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-rw-r--r--sw/cpld/ADDRESS_DECODER.STY4
-rw-r--r--sw/cpld/ADDRESS_DECODER.lci107
-rw-r--r--sw/cpld/ADDRESS_DECODER.lct107
-rw-r--r--sw/cpld/ADDRESS_DECODER.naf22
-rw-r--r--sw/cpld/ADDRESS_DECODER.syn11
-rw-r--r--sw/cpld/ADDRESS_DECODER.tcl270
-rw-r--r--sw/cpld/ADDRESS_DECODER_tcl.ini5
-rw-r--r--sw/cpld/address_decoder.jhd3
-rw-r--r--sw/cpld/address_decoder.jid1
-rw-r--r--sw/cpld/address_decoder.rev3
-rw-r--r--sw/cpld/address_decoder.vhd37
-rw-r--r--sw/cpld/automake.log10
-rw-r--r--sw/cpld/syndos.env41
-rw-r--r--sw/pld/ADDRESS_DECODER.absbin1481 -> 0 bytes
-rw-r--r--sw/pld/ADDRESS_DECODER.jed28
-rw-r--r--sw/pld/ADDRESS_DECODER.pdf169
-rw-r--r--sw/pld/ADDRESS_DECODER.sim50
-rw-r--r--sw/pld/__Previews/ADDRESS DECODER.PLDPreview14
-rw-r--r--sw/pld/address_decoder.PLD35
-rw-r--r--sw/z80/coding_rules.txt120
-rw-r--r--sw/z80/crt0.s125
-rw-r--r--sw/z80/kernel/include/devices.h13
-rw-r--r--sw/z80/kernel/include/pio.h35
-rw-r--r--sw/z80/kernel/include/types.h4
-rw-r--r--sw/z80/kernel/include/usart.h149
-rw-r--r--sw/z80/kernel/kernel.c9
-rw-r--r--sw/z80/kernel/pio.c18
-rw-r--r--sw/z80/kernel/usart.c91
-rw-r--r--sw/z80/libc/include/stdio.h11
-rw-r--r--sw/z80/libc/include/string.h8
-rw-r--r--sw/z80/libc/include/sysio.h55
-rw-r--r--sw/z80/libc/stdio.c12
-rw-r--r--sw/z80/libc/string.c13
-rw-r--r--sw/z80/makefile20
34 files changed, 1266 insertions, 334 deletions
diff --git a/sw/cpld/ADDRESS_DECODER.STY b/sw/cpld/ADDRESS_DECODER.STY
new file mode 100644
index 0000000..afd24c5
--- /dev/null
+++ b/sw/cpld/ADDRESS_DECODER.STY
@@ -0,0 +1,4 @@
+[STRATEGY-LIST]
+Normal=True, 1491209776
+[synthesis-type]
+tool=Synplify
diff --git a/sw/cpld/ADDRESS_DECODER.lci b/sw/cpld/ADDRESS_DECODER.lci
new file mode 100644
index 0000000..47875d5
--- /dev/null
+++ b/sw/cpld/ADDRESS_DECODER.lci
@@ -0,0 +1,107 @@
+
+[Device]
+Family = M4A3;
+PartNumber = M4A3-32/32-10JC;
+Package = 44PLCC;
+PartType = M4A3-32/32;
+Speed = -10;
+Operating_condition = COM;
+Status = Production;
+
+[Revision]
+Parent = m4a332.lci;
+DATE = 2002;
+TIME = 0:00:00;
+Source_Format = Pure_VHDL;
+Synthesis = Synplify;
+
+[Ignore Assignments]
+
+[Clear Assignments]
+
+[Backannotate Assignments]
+
+[Global Constraints]
+
+[Location Assignments]
+layer = OFF;
+
+[Group Assignments]
+layer = OFF;
+
+[Resource Reservations]
+layer = OFF;
+
+[Fitter Report Format]
+
+[Power]
+
+[Source Constraint Option]
+
+[Fast Bypass]
+
+[OSM Bypass]
+
+[Input Registers]
+
+[Netlist/Delay Format]
+NetList = VHDL;
+
+[IO Types]
+layer = OFF;
+
+[Pullup]
+
+[Slewrate]
+
+[Region]
+
+[Timing Constraints]
+
+[HSI Attributes]
+
+[Input Delay]
+
+[opt global constraints list]
+
+[Explorer User Settings]
+
+[Pin attributes list]
+
+[global constraints list]
+
+[Global Constraints Process Update]
+
+[pin lock limitation]
+
+[LOCATION ASSIGNMENTS LIST]
+
+[RESOURCE RESERVATIONS LIST]
+
+[individual constraints list]
+
+[Attributes list setting]
+
+[Timing Analyzer]
+
+[PLL Assignments]
+
+[Dual Function Macrocell]
+
+[Explorer Results]
+
+[VHDL synplify constraints]
+
+[VHDL spectrum constraints]
+
+[verilog synplify constraints]
+
+[verilog spectrum constraints]
+
+[VHDL synplify constraints list]
+
+[VHDL spectrum constraints list]
+
+[verilog synplify constraints list]
+
+[verilog spectrum constraints list]
diff --git a/sw/cpld/ADDRESS_DECODER.lct b/sw/cpld/ADDRESS_DECODER.lct
new file mode 100644
index 0000000..47875d5
--- /dev/null
+++ b/sw/cpld/ADDRESS_DECODER.lct
@@ -0,0 +1,107 @@
+
+[Device]
+Family = M4A3;
+PartNumber = M4A3-32/32-10JC;
+Package = 44PLCC;
+PartType = M4A3-32/32;
+Speed = -10;
+Operating_condition = COM;
+Status = Production;
+
+[Revision]
+Parent = m4a332.lci;
+DATE = 2002;
+TIME = 0:00:00;
+Source_Format = Pure_VHDL;
+Synthesis = Synplify;
+
+[Ignore Assignments]
+
+[Clear Assignments]
+
+[Backannotate Assignments]
+
+[Global Constraints]
+
+[Location Assignments]
+layer = OFF;
+
+[Group Assignments]
+layer = OFF;
+
+[Resource Reservations]
+layer = OFF;
+
+[Fitter Report Format]
+
+[Power]
+
+[Source Constraint Option]
+
+[Fast Bypass]
+
+[OSM Bypass]
+
+[Input Registers]
+
+[Netlist/Delay Format]
+NetList = VHDL;
+
+[IO Types]
+layer = OFF;
+
+[Pullup]
+
+[Slewrate]
+
+[Region]
+
+[Timing Constraints]
+
+[HSI Attributes]
+
+[Input Delay]
+
+[opt global constraints list]
+
+[Explorer User Settings]
+
+[Pin attributes list]
+
+[global constraints list]
+
+[Global Constraints Process Update]
+
+[pin lock limitation]
+
+[LOCATION ASSIGNMENTS LIST]
+
+[RESOURCE RESERVATIONS LIST]
+
+[individual constraints list]
+
+[Attributes list setting]
+
+[Timing Analyzer]
+
+[PLL Assignments]
+
+[Dual Function Macrocell]
+
+[Explorer Results]
+
+[VHDL synplify constraints]
+
+[VHDL spectrum constraints]
+
+[verilog synplify constraints]
+
+[verilog spectrum constraints]
+
+[VHDL synplify constraints list]
+
+[VHDL spectrum constraints list]
+
+[verilog synplify constraints list]
+
+[verilog spectrum constraints list]
diff --git a/sw/cpld/ADDRESS_DECODER.naf b/sw/cpld/ADDRESS_DECODER.naf
new file mode 100644
index 0000000..fe52855
--- /dev/null
+++ b/sw/cpld/ADDRESS_DECODER.naf
@@ -0,0 +1,22 @@
+PA[15] i
+PA[14] i
+PA[13] i
+PA[12] i
+PA[11] i
+PA[10] i
+PA[9] i
+PA[8] i
+PA[7] i
+PA[6] i
+PA[5] i
+PA[4] i
+PA[3] i
+PA[2] i
+PA[1] i
+PA[0] i
+CSROMH o
+CSROML o
+CSRAM o
+CSUART o
+CSCTC o
+CSPIO o
diff --git a/sw/cpld/ADDRESS_DECODER.syn b/sw/cpld/ADDRESS_DECODER.syn
new file mode 100644
index 0000000..419b6ba
--- /dev/null
+++ b/sw/cpld/ADDRESS_DECODER.syn
@@ -0,0 +1,11 @@
+JDF B
+// Created by Version 2.0
+PROJECT ADDRESS_DECODER
+DESIGN address_decoder Normal
+DEVKIT M4A3-32/32-10JC
+ENTRY Pure VHDL
+MODULE address_decoder.vhd
+MODSTYLE ADDRESS_DECODER Normal
+SYNTHESIS_TOOL Synplify
+SIMULATOR_TOOL ActiveHDL
+TOPMODULE ADDRESS_DECODER
diff --git a/sw/cpld/ADDRESS_DECODER.tcl b/sw/cpld/ADDRESS_DECODER.tcl
new file mode 100644
index 0000000..4c9fe3f
--- /dev/null
+++ b/sw/cpld/ADDRESS_DECODER.tcl
@@ -0,0 +1,270 @@
+
+########## Tcl recorder starts at 04/03/17 14:05:56 ##########
+
+set version "2.0"
+set proj_dir "//nas001/account_PIF/_prossn/SAMB_3/lab3/projects/z80uPC/sw/cpld"
+cd $proj_dir
+
+# Get directory paths
+set pver $version
+regsub -all {\.} $pver {_} pver
+set lscfile "lsc_"
+append lscfile $pver ".ini"
+set lsvini_dir [lindex [array get env LSC_INI_PATH] 1]
+set lsvini_path [file join $lsvini_dir $lscfile]
+if {[catch {set fid [open $lsvini_path]} msg]} {
+ puts "File Open Error: $lsvini_path"
+ return false
+} else {set data [read $fid]; close $fid }
+foreach line [split $data '\n'] {
+ set lline [string tolower $line]
+ set lline [string trim $lline]
+ if {[string compare $lline "\[paths\]"] == 0} { set path 1; continue}
+ if {$path && [regexp {^\[} $lline]} {set path 0; break}
+ if {$path && [regexp {^bin} $lline]} {set cpld_bin $line; continue}
+ if {$path && [regexp {^fpgapath} $lline]} {set fpga_dir $line; continue}
+ if {$path && [regexp {^fpgabinpath} $lline]} {set fpga_bin $line}}
+
+set cpld_bin [string range $cpld_bin [expr [string first "=" $cpld_bin]+1] end]
+regsub -all "\"" $cpld_bin "" cpld_bin
+set cpld_bin [file join $cpld_bin]
+set install_dir [string range $cpld_bin 0 [expr [string first "ispcpld" $cpld_bin]-2]]
+regsub -all "\"" $install_dir "" install_dir
+set install_dir [file join $install_dir]
+set fpga_dir [string range $fpga_dir [expr [string first "=" $fpga_dir]+1] end]
+regsub -all "\"" $fpga_dir "" fpga_dir
+set fpga_dir [file join $fpga_dir]
+set fpga_bin [string range $fpga_bin [expr [string first "=" $fpga_bin]+1] end]
+regsub -all "\"" $fpga_bin "" fpga_bin
+set fpga_bin [file join $fpga_bin]
+
+if {[string match "*$fpga_bin;*" $env(PATH)] == 0 } {
+ set env(PATH) "$fpga_bin;$env(PATH)" }
+
+if {[string match "*$cpld_bin;*" $env(PATH)] == 0 } {
+ set env(PATH) "$cpld_bin;$env(PATH)" }
+
+lappend auto_path [file join $install_dir "ispcpld" "tcltk" "lib" "ispwidget" "runproc"]
+package require runcmd
+
+# Commands to make the Process:
+# Hierarchy
+if [runCmd "\"$cpld_bin/vhd2jhd\" address_decoder.vhd -o address_decoder.jhd -m \"$install_dir/ispcpld/generic/lib/vhd/location.map\" -p \"$install_dir/ispcpld/generic/lib\""] {
+ return
+} else {
+ vwait done
+ if [checkResult $done] {
+ return
+ }
+}
+
+########## Tcl recorder end at 04/03/17 14:05:56 ###########
+
+
+########## Tcl recorder starts at 04/03/17 14:07:59 ##########
+
+# Commands to make the Process:
+# Hierarchy
+if [runCmd "\"$cpld_bin/vhd2jhd\" address_decoder.vhd -o address_decoder.jhd -m \"$install_dir/ispcpld/generic/lib/vhd/location.map\" -p \"$install_dir/ispcpld/generic/lib\""] {
+ return
+} else {
+ vwait done
+ if [checkResult $done] {
+ return
+ }
+}
+
+########## Tcl recorder end at 04/03/17 14:07:59 ###########
+
+
+########## Tcl recorder starts at 04/03/17 14:08:48 ##########
+
+# Commands to make the Process:
+# Hierarchy
+if [runCmd "\"$cpld_bin/vhd2jhd\" address_decoder.vhd -o address_decoder.jhd -m \"$install_dir/ispcpld/generic/lib/vhd/location.map\" -p \"$install_dir/ispcpld/generic/lib\""] {
+ return
+} else {
+ vwait done
+ if [checkResult $done] {
+ return
+ }
+}
+
+########## Tcl recorder end at 04/03/17 14:08:48 ###########
+
+
+########## Tcl recorder starts at 04/03/17 14:11:44 ##########
+
+# Commands to make the Process:
+# Hierarchy
+if [runCmd "\"$cpld_bin/vhd2jhd\" address_decoder.vhd -o address_decoder.jhd -m \"$install_dir/ispcpld/generic/lib/vhd/location.map\" -p \"$install_dir/ispcpld/generic/lib\""] {
+ return
+} else {
+ vwait done
+ if [checkResult $done] {
+ return
+ }
+}
+
+########## Tcl recorder end at 04/03/17 14:11:44 ###########
+
+
+########## Tcl recorder starts at 04/03/17 14:22:22 ##########
+
+# Commands to make the Process:
+# Hierarchy
+if [runCmd "\"$cpld_bin/vhd2jhd\" address_decoder.vhd -o address_decoder.jhd -m \"$install_dir/ispcpld/generic/lib/vhd/location.map\" -p \"$install_dir/ispcpld/generic/lib\""] {
+ return
+} else {
+ vwait done
+ if [checkResult $done] {
+ return
+ }
+}
+
+########## Tcl recorder end at 04/03/17 14:22:22 ###########
+
+
+########## Tcl recorder starts at 04/03/17 14:22:30 ##########
+
+# Commands to make the Process:
+# Hierarchy
+if [runCmd "\"$cpld_bin/vhd2jhd\" address_decoder.vhd -o address_decoder.jhd -m \"$install_dir/ispcpld/generic/lib/vhd/location.map\" -p \"$install_dir/ispcpld/generic/lib\""] {
+ return
+} else {
+ vwait done
+ if [checkResult $done] {
+ return
+ }
+}
+
+########## Tcl recorder end at 04/03/17 14:22:31 ###########
+
+
+########## Tcl recorder starts at 04/03/17 14:28:11 ##########
+
+# Commands to make the Process:
+# Hierarchy
+if [runCmd "\"$cpld_bin/vhd2jhd\" address_decoder.vhd -o address_decoder.jhd -m \"$install_dir/ispcpld/generic/lib/vhd/location.map\" -p \"$install_dir/ispcpld/generic/lib\""] {
+ return
+} else {
+ vwait done
+ if [checkResult $done] {
+ return
+ }
+}
+
+########## Tcl recorder end at 04/03/17 14:28:11 ###########
+
+
+########## Tcl recorder starts at 04/03/17 14:56:18 ##########
+
+# Commands to make the Process:
+# Hierarchy
+if [runCmd "\"$cpld_bin/vhd2jhd\" address_decoder.vhd -o address_decoder.jhd -m \"$install_dir/ispcpld/generic/lib/vhd/location.map\" -p \"$install_dir/ispcpld/generic/lib\""] {
+ return
+} else {
+ vwait done
+ if [checkResult $done] {
+ return
+ }
+}
+
+########## Tcl recorder end at 04/03/17 14:56:18 ###########
+
+
+########## Tcl recorder starts at 04/03/17 14:56:23 ##########
+
+# Commands to make the Process:
+# Hierarchy
+if [runCmd "\"$cpld_bin/vhd2jhd\" address_decoder.vhd -o address_decoder.jhd -m \"$install_dir/ispcpld/generic/lib/vhd/location.map\" -p \"$install_dir/ispcpld/generic/lib\""] {
+ return
+} else {
+ vwait done
+ if [checkResult $done] {
+ return
+ }
+}
+
+########## Tcl recorder end at 04/03/17 14:56:23 ###########
+
+
+########## Tcl recorder starts at 04/13/17 10:29:16 ##########
+
+# Commands to make the Process:
+# Hierarchy
+if [runCmd "\"$cpld_bin/vhd2jhd\" address_decoder.vhd -o address_decoder.jhd -m \"$install_dir/ispcpld/generic/lib/vhd/location.map\" -p \"$install_dir/ispcpld/generic/lib\""] {
+ return
+} else {
+ vwait done
+ if [checkResult $done] {
+ return
+ }
+}
+
+########## Tcl recorder end at 04/13/17 10:29:16 ###########
+
+
+########## Tcl recorder starts at 04/13/17 10:29:50 ##########
+
+# Commands to make the Process:
+# Hierarchy
+if [runCmd "\"$cpld_bin/vhd2jhd\" address_decoder.vhd -o address_decoder.jhd -m \"$install_dir/ispcpld/generic/lib/vhd/location.map\" -p \"$install_dir/ispcpld/generic/lib\""] {
+ return
+} else {
+ vwait done
+ if [checkResult $done] {
+ return
+ }
+}
+
+########## Tcl recorder end at 04/13/17 10:29:50 ###########
+
+
+########## Tcl recorder starts at 04/13/17 10:33:10 ##########
+
+# Commands to make the Process:
+# Hierarchy
+if [runCmd "\"$cpld_bin/vhd2jhd\" address_decoder.vhd -o address_decoder.jhd -m \"$install_dir/ispcpld/generic/lib/vhd/location.map\" -p \"$install_dir/ispcpld/generic/lib\""] {
+ return
+} else {
+ vwait done
+ if [checkResult $done] {
+ return
+ }
+}
+
+########## Tcl recorder end at 04/13/17 10:33:10 ###########
+
+
+########## Tcl recorder starts at 04/13/17 10:33:11 ##########
+
+# Commands to make the Process:
+# Hierarchy
+if [runCmd "\"$cpld_bin/vhd2jhd\" address_decoder.vhd -o address_decoder.jhd -m \"$install_dir/ispcpld/generic/lib/vhd/location.map\" -p \"$install_dir/ispcpld/generic/lib\""] {
+ return
+} else {
+ vwait done
+ if [checkResult $done] {
+ return
+ }
+}
+
+########## Tcl recorder end at 04/13/17 10:33:11 ###########
+
+
+########## Tcl recorder starts at 04/13/17 10:34:43 ##########
+
+# Commands to make the Process:
+# Hierarchy
+if [runCmd "\"$cpld_bin/vhd2jhd\" address_decoder.vhd -o address_decoder.jhd -m \"$install_dir/ispcpld/generic/lib/vhd/location.map\" -p \"$install_dir/ispcpld/generic/lib\""] {
+ return
+} else {
+ vwait done
+ if [checkResult $done] {
+ return
+ }
+}
+
+########## Tcl recorder end at 04/13/17 10:34:43 ###########
+
diff --git a/sw/cpld/ADDRESS_DECODER_tcl.ini b/sw/cpld/ADDRESS_DECODER_tcl.ini
new file mode 100644
index 0000000..fae7b5f
--- /dev/null
+++ b/sw/cpld/ADDRESS_DECODER_tcl.ini
@@ -0,0 +1,5 @@
+[Tcl]
+Start = Yes;
+Process = YES;
+Append = YES;
+TclFilename = ADDRESS_DECODER.tcl;
diff --git a/sw/cpld/address_decoder.jhd b/sw/cpld/address_decoder.jhd
new file mode 100644
index 0000000..19ef983
--- /dev/null
+++ b/sw/cpld/address_decoder.jhd
@@ -0,0 +1,3 @@
+
+
+MODULE ADDRESS_DECODER
diff --git a/sw/cpld/address_decoder.jid b/sw/cpld/address_decoder.jid
new file mode 100644
index 0000000..f0d5286
--- /dev/null
+++ b/sw/cpld/address_decoder.jid
@@ -0,0 +1 @@
+. ADDRESS_DECODER address_decoder.vhd \\nas001\account_pif\_prossn\samb_3\lab3\projects\z80upc\sw\cpld\address_decoder.vhd
diff --git a/sw/cpld/address_decoder.rev b/sw/cpld/address_decoder.rev
new file mode 100644
index 0000000..e8bfb3d
--- /dev/null
+++ b/sw/cpld/address_decoder.rev
@@ -0,0 +1,3 @@
+<SYNPROJ_Revision_Control>
+<RevisionControl_Info/>
+</SYNPROJ_Revision_Control>
diff --git a/sw/cpld/address_decoder.vhd b/sw/cpld/address_decoder.vhd
new file mode 100644
index 0000000..2c80f86
--- /dev/null
+++ b/sw/cpld/address_decoder.vhd
@@ -0,0 +1,37 @@
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.std_logic_arith.all;
+use ieee.std_logic_unsigned.all;
+
+entity ADDRESS_DECODER is
+
+port(
+ -- address input
+ PA: in unsigned(15 downto 0);
+
+ -- chip selects output
+ -- memory
+ CSROMH: out std_logic;
+ CSROML: out std_logic;
+ CSRAM : out std_logic;
+ -- io chips
+ CSUART: out std_logic;
+ CSCTC : out std_logic;
+ CSPIO : out std_logic
+);
+
+end;
+
+architecture Behavioral of ADDRESS_DECODER is
+begin
+ -- memory
+ CSROMH <= 0 when ((PA >= x"0000") and (PA < x"2000"));
+ CSROML <= 0 when ((PA >= x"4000") and (PA < x"4000"));
+ CSRAM <= 0 when (PA >= x"D000");
+ -- io chips
+ CSUART <= 0 when ((PA >= x"4000") and (PA < x"4008"));
+ -- CSCTC
+ -- CSPIO
+
+end Behavioral;
+
diff --git a/sw/cpld/automake.log b/sw/cpld/automake.log
new file mode 100644
index 0000000..f24e14f
--- /dev/null
+++ b/sw/cpld/automake.log
@@ -0,0 +1,10 @@
+ispLEVER Auto-Make Log File
+---------------------------
+
+Updating: Hierarchy
+Start to record tcl script...
+Finished recording TCL script.
+
+Starting: 'C:\ispLEVER_Classic2\ispcpld\bin\vhd2jhd.exe address_decoder.vhd -o address_decoder.jhd -m "C:\ispLEVER_Classic2\ispcpld/generic/lib/vhd/location.map" -p "C:\ispLEVER_Classic2\ispcpld/generic/lib"'
+
+Done: completed successfully.
diff --git a/sw/cpld/syndos.env b/sw/cpld/syndos.env
new file mode 100644
index 0000000..16036da
--- /dev/null
+++ b/sw/cpld/syndos.env
@@ -0,0 +1,41 @@
+ABEL5DEV=C:\ispLEVER_Classic2\ispcpld\lib5
+DIOEDA_ABEL5DEV=C:\ispLEVER_Classic2\ispcpld\lib5
+DIOEDA_ActiveHDL=C:\ispLEVER_Classic2\active-hdl\BIN
+DIOEDA_ActiveHDLPath=C:\ispLEVER_Classic2\active-hdl\BIN
+DIOEDA_AppNotes=C:\ispLEVER_Classic2\ispcpld\bin
+DIOEDA_Bin=C:\ispLEVER_Classic2\ispcpld\bin
+DIOEDA_Config=C:\ispLEVER_Classic2\ispcpld\config
+DIOEDA_CONTEXT=ispLEVER CLASSIC
+DIOEDA_DSPPATH=C:\ispLEVER_Classic2\ispLeverDSP
+DIOEDA_EPICPATH=C:\ispLEVER_Classic2\ispfpga\bin\nt
+DIOEDA_Examples=C:\ispLEVER_Classic2\examples
+DIOEDA_FPGABinPath=C:\ispLEVER_Classic2\ispfpga\bin\nt
+DIOEDA_FPGAPath=C:\ispLEVER_Classic2\ispfpga
+DIOEDA_HDLExplorer=C:\ispLEVER_Classic2\hdle\win32
+DIOEDA_INI=C:\lsc_env
+DIOEDA_ispVM=C:\ispLEVER_Classic2\ispvmsystem
+DIOEDA_ispVMSystem=C:\ispLEVER_Classic2\ispvmsystem
+DIOEDA_License=C:\ispLEVER_Classic2\license
+DIOEDA_LSEPath=C:\ispLEVER_Classic2\lse
+DIOEDA_MachPath=C:\ispLEVER_Classic2\ispcpld\bin
+DIOEDA_Manuals=C:\ispLEVER_Classic2\ispcpld\manuals
+DIOEDA_ModelSim=C:\ispLEVER_Classic2\modelsim\win32loem
+DIOEDA_ModelsimPath=C:\ispLEVER_Classic2\modelsim\win32loem
+DIOEDA_PDSPath=C:\ispLEVER_Classic2\ispcomp
+DIOEDA_Precision=C:\isptools\precision
+DIOEDA_PrecisionPath=C:\isptools\precision
+DIOEDA_ProductName=ispLEVER
+DIOEDA_ProductPrefix=SYN
+DIOEDA_ProductTitle=ispLEVER
+DIOEDA_ProductType=2.0.00.17.20.15_LS_HDL_BASE_PC_N
+DIOEDA_ProductVersion=2.0.00.17
+DIOEDA_ProgramFolder=ispLEVER Classic 2.0
+DIOEDA_Root=C:\ispLEVER_Classic2\ispcpld
+DIOEDA_Spectrum=C:\isptools\spectrum
+DIOEDA_SpectrumPath=C:\isptools\spectrum
+DIOEDA_Synplify=C:\ispLEVER_Classic2\synpbase
+DIOEDA_SynplifyPath=C:\ispLEVER_Classic2\synpbase
+DIOEDA_Synthesis=C:\ispLEVER_Classic2\lse\bin\nt
+DIOEDA_Tutorial=C:\ispLEVER_Classic2\ispcpld\tutorial
+DIOPRODUCT=ispLEVER
+PATH=C:\ispLEVER_Classic2\ispcpld\bin
diff --git a/sw/pld/ADDRESS_DECODER.abs b/sw/pld/ADDRESS_DECODER.abs
deleted file mode 100644
index ab6deb9..0000000
--- a/sw/pld/ADDRESS_DECODER.abs
+++ /dev/null
Binary files differ
diff --git a/sw/pld/ADDRESS_DECODER.jed b/sw/pld/ADDRESS_DECODER.jed
deleted file mode 100644
index 0525a9d..0000000
--- a/sw/pld/ADDRESS_DECODER.jed
+++ /dev/null
@@ -1,28 +0,0 @@
-
-CUPL(WM) 5.0a Serial# 60008009
-Device g16v8as Library DLIB-h-40-2
-Created Fri Mar 17 15:18:30 2017
-Name ADDRESS_DECODER
-Partno 00
-Revision 01
-Date 17.03.2017
-Designer Engineer
-Company SAM Bellinzona
-Assembly None
-Location
-*QP20
-*QF2194
-*G0
-*F0
-*L00512 01110111101110111011011110111011
-*L00768 10110111101110111011011110111011
-*L01024 10111011101110111011011110111011
-*L01280 11111111111111111111111111111011
-*L01536 11111111111111111111011110111011
-*L01792 11111111111111111111101110111011
-*L02048 00000100001100000011000000100000
-*L02112 00000000110000001111111111111111
-*L02144 11111111111111111111111111111111
-*L02176 111111111111111110
-*C1E45
-*A086 \ No newline at end of file
diff --git a/sw/pld/ADDRESS_DECODER.pdf b/sw/pld/ADDRESS_DECODER.pdf
deleted file mode 100644
index 2a0c7dc..0000000
--- a/sw/pld/ADDRESS_DECODER.pdf
+++ /dev/null
@@ -1,169 +0,0 @@
-{COMPONENT F:\SCHOOL\LAB3\PROJECTS\Z80UPC\SW\PLD\ADDRESS_DECODER.SYM
-
- {ENVIRONMENT
- {PDIFvrev 3.00}
- {Program "CUPL(WM) Version 5.0a"}
- {DBtype "Schematic"}
- {DBvrev 1.01}
- {DBtime "Fri Mar 17 15:18:30 2017 "}
- {DBunit "MIL"}
- {DBgrid 10}
- {Lyrstr "WIRES" 1 "BUS" 1 "GATE" 2 "IEEE" 2 "PINFUN" 3 "PINNUM" 1
- "PINNAM" 6 "PINCON" 4 "REFDES" 2 "ATTR" 6 "SDOT" 1
- "DEVICE" 5 "OUTLIN" 5 "ATTR2" 6 "NOTES" 6 "NETNAM" 4
- "CMPNAM" 5 "BORDER" 5}
- }
-
- {USER
- {VIEW
- {Mode SYMB}
- {Nlst OPEN}
- {Vw 0 0 2}
- {Lv 12 2 2 2 0 0 2 2 2 2 0 0 2 1 2 0 0 0 0}
- {Gs 10 10}
- }
- }
-
- {DISPLAY
- [Ly "PINNUM"]
- [Ls "SOLID"][Wd 0]
- [Ts 15][Tj "LC"][Tr 0][Tm "N"]
- }
-
- {SYMBOL
- {PIN_DEF
- [Ly "PINCON"]
- {P A8 {Pt "INPUT"}{Lq 0}{Ploc 100 160}}
- {P A9 {Pt "INPUT"}{Lq 0}{Ploc 100 140}}
- {P A10 {Pt "INPUT"}{Lq 0}{Ploc 100 120}}
- {P A11 {Pt "INPUT"}{Lq 0}{Ploc 100 100}}
- {P A12 {Pt "INPUT"}{Lq 0}{Ploc 100 80}}
- {P A13 {Pt "INPUT"}{Lq 0}{Ploc 100 60}}
- {P A14 {Pt "INPUT"}{Lq 0}{Ploc 100 40}}
- {P A15 {Pt "INPUT"}{Lq 0}{Ploc 100 20}}
- {P CSROML {Pt "I/O"}{Lq 0}{Ploc 290 20}}
- {P CSROMH {Pt "I/O"}{Lq 0}{Ploc 290 40}}
- {P CSRAM {Pt "I/O"}{Lq 0}{Ploc 290 60}}
- {P CSUART {Pt "I/O"}{Lq 0}{Ploc 290 80}}
- {P CSCTC {Pt "I/O"}{Lq 0}{Ploc 290 100}}
- {P CSPIO {Pt "I/O"}{Lq 0}{Ploc 290 120}}
- }
-
- {PKG
- [Ly "REFDES"]
- [Ts 25][Tj "CB"][Tr 0][Tm "N"]
- {Rdl 195 190}
-
- [Ly "PINNUM"]
- [Ts 15][Tj "RC"]
- {Pnl 120 170}
- {Pnl 120 150}
- {Pnl 120 130}
- {Pnl 120 110}
- {Pnl 120 90}
- {Pnl 120 70}
- {Pnl 120 50}
- {Pnl 120 30}
- [Ts 15][Tj "LC"]
- {Pnl 270 30}
- {Pnl 270 50}
- {Pnl 270 70}
- {Pnl 270 90}
- {Pnl 270 110}
- {Pnl 270 130}
-
- {Sd A 2 3 4 5 6 7 8 9 12 13 14 15 16 17}
- }
-
- {PIC
- [Ly "GATE"]
- [Ts 15][Tj "LC"][Tr 0][Tm "N"]
- {R 130 180 260 0}
- {L 130 160 100 160}
- {L 130 140 100 140}
- {L 130 120 100 120}
- {L 130 100 100 100}
- {L 130 80 100 80}
- {L 130 60 100 60}
- {L 130 40 100 40}
- {L 130 20 100 20}
- {L 260 20 290 20}
- {L 260 40 290 40}
- {L 260 60 290 60}
- {L 260 80 290 80}
- {L 260 100 290 100}
- {L 260 120 290 120}
- [Ly "PINNAM"]
- [Tj "LC"]
- {T "A8" 140 160}
- {T "A9" 140 140}
- {T "A10" 140 120}
- {T "A11" 140 100}
- {T "A12" 140 80}
- {T "A13" 140 60}
- {T "A14" 140 40}
- {T "A15" 140 20}
- [Tj "RC"]
- {T "CSROML" 250 20}
- {T "CSROMH" 250 40}
- {T "CSRAM" 250 60}
- {T "CSUART" 250 80}
- {T "CSCTC" 250 100}
- {T "CSPIO" 250 120}
- [Ly "DEVICE"]
- [Tj "CT"]
- {T "G16V8AS" 195 -10}
- }
-
- {ATR
- {IN
- {Org 100 20}
- {Ty 255}
- }
- {EX
- [Ly "ATTR2"]
- [Ts 12][Tj "CT"][Tr 0][Tm "N"]
- {At PLD F:\SCHOOL\LAB3\PROJECTS\Z80UPC\SW\PLD\ADDRESS_DECODER 195 180}
- }
- }
- }
-
- {DETAIL
- {ANNOTATE
- }
-
- {NET_DEF
- {N A8
- }
- {N A9
- }
- {N A10
- }
- {N A11
- }
- {N A12
- }
- {N A13
- }
- {N A14
- }
- {N A15
- }
- {N CSROML
- }
- {N CSROMH
- }
- {N CSRAM
- }
- {N CSUART
- }
- {N CSCTC
- }
- {N CSPIO
- }
- }
-
- {SUBCOMP
- }
- }
-}
diff --git a/sw/pld/ADDRESS_DECODER.sim b/sw/pld/ADDRESS_DECODER.sim
deleted file mode 100644
index 05661c0..0000000
--- a/sw/pld/ADDRESS_DECODER.sim
+++ /dev/null
@@ -1,50 +0,0 @@
-%SIGNAL
-PIN 2 = A8
-PIN 3 = A9
-PIN 4 = A10
-PIN 5 = A11
-PIN 6 = A12
-PIN 7 = A13
-PIN 8 = A14
-PIN 9 = A15
-PIN 16 = CSCTC
-PIN 17 = CSPIO
-PIN 14 = CSRAM
-PIN 13 = CSROMH
-PIN 12 = CSROML
-PIN 15 = CSUART
-%END
-
-%FIELD
-%END
-
-%EQUATION
-CSCTC =>
- !A8 & A9 & !A10 & !A11 & !A12 & A13 & !A14 & !A15
-
-CSPIO =>
- A8 & A9 & !A10 & !A11 & !A12 & A13 & !A14 & !A15
-
-CSRAM =>
- !A15
-
-CSROMH =>
- A13 & !A14 & !A15
-
-CSROML =>
- !A13 & !A14 & !A15
-
-CSTIMER =>
- A15
- # A14
- # !A13
- # A12
- # A11
- # A10
- # A9
- # !A8
-
-CSUART =>
- !A8 & !A9 & !A10 & !A11 & !A12 & A13 & !A14 & !A15
-
-%END
diff --git a/sw/pld/__Previews/ADDRESS DECODER.PLDPreview b/sw/pld/__Previews/ADDRESS DECODER.PLDPreview
deleted file mode 100644
index 8b8cb8c..0000000
--- a/sw/pld/__Previews/ADDRESS DECODER.PLDPreview
+++ /dev/null
@@ -1,14 +0,0 @@
-[Preview]
-LargeImageOriginalSize=708000
-LargeImageWidth=354
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-
diff --git a/sw/pld/address_decoder.PLD b/sw/pld/address_decoder.PLD
deleted file mode 100644
index 1cc9e22..0000000
--- a/sw/pld/address_decoder.PLD
+++ /dev/null
@@ -1,35 +0,0 @@
-Name ADDRESS_DECODER ;
-PartNo 00 ;
-Date 17.03.2017 ;
-Revision 01 ;
-Designer Engineer ;
-Company SAM Bellinzona ;
-Assembly None ;
-Location ;
-Device g16v8a;
-
-/* *************** INPUT PINS *********************/
-PIN 2 = A8 ;
-PIN 3 = A9 ;
-PIN 4 = A10 ;
-PIN 5 = A11 ;
-PIN 6 = A12 ;
-PIN 7 = A13 ;
-PIN 8 = A14 ;
-PIN 9 = A15 ;
-
-/* *************** OUTPUT PINS *********************/
-PIN 12 = CSROML ;
-PIN 13 = CSROMH ;
-PIN 14 = CSRAM ;
-PIN 15 = CSUART ;
-PIN 16 = CSCTC ;
-PIN 17 = CSPIO ;
-
-CSRAM = !A15 ;
-CSROML = !(!A15 & !A14 & !A13) ;
-CSROMH = !(!A15 & !A14 & A13) ;
-CSUART = !(!A15 & !A14 & A13 & !A12 & !A11 & !A10 & !A9 & !A8) ;
-CSTIMER = !(!A15 & !A14 & A13 & !A12 & !A11 & !A10 & !A9 & A8) ;
-CSCTC = !(!A15 & !A14 & A13 & !A12 & !A11 & !A10 & A9 & !A8) ;
-CSPIO = !(!A15 & !A14 & A13 & !A12 & !A11 & !A10 & A9 & A8) ;
diff --git a/sw/z80/coding_rules.txt b/sw/z80/coding_rules.txt
new file mode 100644
index 0000000..e5c11f0
--- /dev/null
+++ b/sw/z80/coding_rules.txt
@@ -0,0 +1,120 @@
+CODING STYLE FOR THIS PROJECT
+=============================
+
+In order to have a consistent codebase, there are the following rules on
+writing code in C (and assembly). For the most part they are similar to the
+Linux kernel coding rules by Torvalds.
+
+PROGRAM LOGIC
+-------------
+I expect a certain level of common sense from people so I won't mention the
+super-basic stuff. But I would like to point out a few thing I WON'T accept
+(unless there is a valid reason and an explanation of why). First, I believe
+that code has to be aesthetically pleasing to watch and with a clear logic
+flow so:
+
+ - Avoid deeply nested code and recursive black magic
+
+ - No special cases: generally the code of a function should behave the
+ same with any argument. Avoid horrible exceptions for magic values
+
+ - No extreme modularization: do not write code that is extremely
+ encapsulated with dozens of helper functions to control every signal
+ that runs through the damn motherboard
+
+EDITOR (SPACES > TABS)
+----------------------
+You can use your favourite editor but spaces are better than tabs, no
+discussion. For this project every source file must have an indent of 4
+spaces. Since 80 characters is the standard terminal width, the code has to be
+hard wrapped at 80, 78 or 72 characters. Also there shouldn't be any markup on
+the source code for your editor, not even in the comments; just the code.
+
+ - use spaces, 1 indent - 4 spaces
+ - hard wrap at 80 / 78 / 72 characters
+ - no markup for folds or any other editor specific feature
+
+
+C CODE INDENT AND BRACES
+------------------------
+I personally prefer the K&R coding style because it was used in 'The C
+Programming Language' book from Dennis Ritchie which is the 'standard' for
+learning C. But I also like Linus' kernel coding rules, so sometimes I might
+use some of his rules. Anyway, you can look them up if you want to or just
+look at the following example that sums most of the important stuff.
+
+ - K&R braces and function prototypes
+ - snake_case for variables and function names
+ - pointer asterisk in front of the variable ( ex: int *p; )
+
+Here's a short example that uses most of the stuff:
+
+ #include <stdio.h>
+ #include <stdlib.h>
+
+ #define MY_DEVICE_MEMORY_ADDR 0x5020
+
+ #define MY_DEVICE_FLAG_RDY 1
+ #define MY_DEVICE_FLAG_ERR 2
+
+ // same for unions
+ struct my_device
+ {
+ volatile uint8_t buffer;
+ volatile uint8_t flags;
+ } *_my_dev = (struct my_device *) MY_DEVICE_MEMORY_ADDR;
+
+
+ int my_device_write(uint8_t *data, size_t size);
+
+ /* This is the main function
+ * and this is a multiline comment to explain something if needed
+ */
+ int main(int argc, char *argv[])
+ {
+ int i;
+ int j = 0;
+ uint8_t data[2] = { 0xFF, 0xAB };
+ const char *string = "My magic string";
+
+ while (j < 100) {
+ j++;
+ }
+
+ printf("%s\n", string);
+
+ if (some_condition) {
+ // inline comment
+ } else {
+ my_device_write(data, 2);
+ }
+
+ switch (i) {
+ case 0:
+ some_function();
+ break;
+
+ case 1:
+ // ...
+ break;
+
+ default:
+ // ...
+ }
+ }
+
+ int my_device_write(uint8_t *data, size_t size)
+ {
+ int i;
+
+ for (i = 0; i < size; i++) {
+ _my_dev.buffer = data;
+ while (!(_my_dev.flags & (1<<MY_DEVICE_FLAG_RDY)));
+
+ if (_my_dev.flags & (1<<MY_DEVICE_FLAG_ERR)) {
+ return -1;
+ }
+ }
+
+ return i;
+ }
diff --git a/sw/z80/crt0.s b/sw/z80/crt0.s
index d0ae3ca..00c7da1 100644
--- a/sw/z80/crt0.s
+++ b/sw/z80/crt0.s
@@ -1,30 +1,103 @@
- .area _HEADER (ABS)
- ;; reset vector
- .org 0
- jp init
-
- .org 0x08
- reti
- .org 0x10
- reti
- .org 0x18
- reti
- .org 0x20
- reti
- .org 0x28
- reti
- .org 0x30
- reti
- .org 0x38
- reti
-
- .org 0x100
+;--------------------------------------------------------------------------
+; crt0.s - Generic crt0.s for a Z80
+;
+; Copyright (C) 2000, Michael Hope
+;
+; This library is free software; you can redistribute it and/or modify it
+; under the terms of the GNU General Public License as published by the
+; Free Software Foundation; either version 2, or (at your option) any
+; later version.
+;
+; This library is distributed in the hope that it will be useful,
+; but WITHOUT ANY WARRANTY; without even the implied warranty of
+; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+; GNU General Public License for more details.
+;
+; You should have received a copy of the GNU General Public License
+; along with this library; see the file COPYING. If not, write to the
+; Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
+; MA 02110-1301, USA.
+;
+; As a special exception, if you link this library with other files,
+; some of which are compiled with SDCC, to produce an executable,
+; this library does not by itself cause the resulting executable to
+; be covered by the GNU General Public License. This exception does
+; not however invalidate any other reasons why the executable file
+; might be covered by the GNU General Public License.
+;--------------------------------------------------------------------------
+ .module crt0
+ .globl _kmain
+
+ .area _HEADER (ABS)
+ ;; Reset vector
+ .org 0
+ jp init
+
+ .org 0x08
+ reti
+ .org 0x10
+ reti
+ .org 0x18
+ reti
+ .org 0x20
+ reti
+ .org 0x28
+ reti
+ .org 0x30
+ reti
+ .org 0x38
+ reti
+
+ .org 0x100
init:
- ;; set stack
- ld sp,#0xFFFF
+ ;; Set stack pointer directly above top of memory.
+ ld sp,#0xFFFF
+
+ ;; Initialise global variables
+ call gsinit
+ call _kmain
+ jp _exit
+
+ ;; Ordering of segments for the linker.
+ .area _HOME
+ .area _CODE
+ .area _INITIALIZER
+ .area _GSINIT
+ .area _GSFINAL
+
+ .area _DATA
+ .area _INITIALIZED
+ .area _BSEG
+ .area _BSS
+ .area _HEAP
+
+ .area _CODE
+
+__clock::
+ ld a,#2
+ rst 0x08
+ ret
+
+_exit::
+ ;; Exit - special code to the emulator
+ ld a,#0
+ rst 0x08
+1$:
+ halt
+ jr 1$
+
+ .area _GSINIT
+gsinit::
+ ; ld bc, #l__INITIALIZER
+ ld a, b
+ or a, c
+ jr Z, gsinit_next
+ ; ld de, #s__INITIALIZED
+ ; ld hl, #s__INITIALIZER
+ ldir
+gsinit_next:
- ;; call C main function
- call _main
+ .area _GSFINAL
+ ret
-.globl _main
diff --git a/sw/z80/kernel/include/devices.h b/sw/z80/kernel/include/devices.h
new file mode 100644
index 0000000..e8c183f
--- /dev/null
+++ b/sw/z80/kernel/include/devices.h
@@ -0,0 +1,13 @@
+#ifndef __DEVICES_H__
+#define __DEVICES_H__
+
+#define ADDR_DEV_ROM_L 0x0000
+#define ADDR_DEV_ROM_H 0x2000
+
+#define ADDR_DEV_USART 0x4000
+#define ADDR_DEV_CTC 0x4100
+#define ADDR_DEV_PIO 0x4200
+
+#define ADDR_DEV_RAM 0x8000
+
+#endif
diff --git a/sw/z80/kernel/include/pio.h b/sw/z80/kernel/include/pio.h
new file mode 100644
index 0000000..5d289ca
--- /dev/null
+++ b/sw/z80/kernel/include/pio.h
@@ -0,0 +1,35 @@
+#ifndef __PIO_H__
+#define __PIO_H__
+
+#include "devices.h"
+#include "types.h"
+
+#define PIO_A 0
+#define PIO_B 1
+
+#define PIO_MODE_0 0
+#define PIO_MODE_1 1
+#define PIO_MODE_2 2
+#define PIO_MODE_3 3
+
+#define PIO_INT_ACTIVE_HIGH (1<<5)
+#define PIO_INT_AND_MODE (1<<6)
+#define PIO_INT_ENABLE (1<<7)
+
+
+void _pio_data(int port, uint8_t data);
+void _pio_command(int port, uint8_t cmd);
+
+void pio_set_mode(int port, int mode);
+void pio_set_interrupts(int port, int control);
+void pio_set_interrupts_mask(int port, uint8_t mask);
+void pio_set_io(int port, uint8_t io);
+
+// uint8_t pio_read_data(int port);
+
+inline int pio_read_pin(int port, uint8_t pin);
+inline void pio_write_pin(int port, uint8_t pin);
+
+// TODO: implement mode (in/out/both) and interrupt vector
+
+#endif // __PIO_H__
diff --git a/sw/z80/kernel/include/types.h b/sw/z80/kernel/include/types.h
index adde214..552b7e9 100644
--- a/sw/z80/kernel/include/types.h
+++ b/sw/z80/kernel/include/types.h
@@ -1,9 +1,13 @@
#ifndef __TYPES_H__
#define __TYPES_H__
+#define register_t volatile unsigned char
+
#define int8_t char
#define uint8_t unsigned char
#define int16_t int
#define uint16_t unsigned int
+#define size_t uint16_t
+
#endif
diff --git a/sw/z80/kernel/include/usart.h b/sw/z80/kernel/include/usart.h
new file mode 100644
index 0000000..3e5c070
--- /dev/null
+++ b/sw/z80/kernel/include/usart.h
@@ -0,0 +1,149 @@
+#ifndef __USART_H__
+#define __USART_H__
+
+#include "types.h"
+#include "devices.h"
+
+#include "string.h"
+
+// baudrate clock divisors
+// values from TL16C550C datasheet (table 9 for 1.8432 MHz crystal)
+#define USART_BAUDRATE_50 2304
+#define USART_BAUDRATE_75 1536
+#define USART_BAUDRATE_110 1047
+#define USART_BAUDRATE_134_5 857
+#define USART_BAUDRATE_150 768
+#define USART_BAUDRATE_300 384
+#define USART_BAUDRATE_600 192
+#define USART_BAUDRATE_1200 96
+#define USART_BAUDRATE_1800 64
+#define USART_BAUDRATE_2000 58
+#define USART_BAUDRATE_2400 48
+#define USART_BAUDRATE_3600 32
+#define USART_BAUDRATE_4800 24
+#define USART_BAUDRATE_7200 16
+#define USART_BAUDRATE_9600 12
+#define USART_BAUDRATE_19200 6
+#define USART_BAUDRATE_38400 3
+#define USART_BAUDRATE_56000 3
+
+// parity
+#define USART_PARITY_NONE 0
+#define USART_PARITY_EVEN 1
+#define USART_PARITY_ODD 2
+
+// stop bits
+#define USART_STOP_BITS_1 10
+#define USART_STOP_BITS_15 15
+#define USART_STOP_BITS_2 20
+
+// word lenght
+#define USART_WORD_LENGTH_5 0
+#define USART_WORD_LENGTH_6 1
+#define USART_WORD_LENGTH_7 2
+#define USART_WORD_LENGTH_8 3
+
+// autoflow
+#define USART_AUTOFLOW_ALL 3
+#define USART_AUTOFLOW_CTS 2
+#define USART_AUTOFLOW_OFF 0
+
+
+/* this structure is only for internal usage */
+struct _usart_device
+{
+ register_t buffer; // also used as LSB for divisor latch
+
+ struct IER
+ {
+ volatile int received_data_interrupt :1;
+ volatile int transmitter_empty_interrupt :1;
+ volatile int receiver_line_status_interrupt :1;
+ volatile int modem_status_interrupt :1;
+ volatile int reserved :4;
+ } IER;
+
+ struct IIR
+ {
+ volatile int interrupt_pending :1;
+ volatile int interrupt_id :3;
+ volatile int reserved :2;
+ volatile int fifos :2;
+ } IIR;
+
+ struct FCR
+ {
+ volatile int fifo_enable :1;
+ volatile int receiver_fifo_rst :1;
+ volatile int trasmitter_fifo_rst :1;
+ volatile int dma_mode_select :1;
+ volatile int reserved :1;
+ volatile int receiver_trigger :2;
+ } FCR;
+
+ struct LCR
+ {
+ volatile int word_length :2;
+ volatile int stop_bits :1;
+ volatile int parity :1;
+ volatile int even_parity :1;
+ volatile int stick_parity :1;
+ volatile int break_control :1;
+ volatile int divisor_latch_access :1;
+ } LCR;
+
+ struct MCR
+ {
+ volatile int data_terminal_ready :1;
+ volatile int request_to_send :1;
+ volatile int out1;
+ volatile int out2;
+ volatile int loop;
+ volatile int autoflow :1;
+ volatile int reserved :2;
+ } MCR;
+
+ struct LSR
+ {
+ volatile int data_ready :1;
+ volatile int overrun_error :1;
+ volatile int parity_error :1;
+ volatile int framing_error :1;
+ volatile int break_interrupt :1;
+ volatile int transmitter_holder_empty :1;
+ volatile int transmitter_empty :1;
+ volatile int fifo_recv_error :1;
+ } LSR;
+
+ struct MSR
+ {
+ volatile int delta_cts :1;
+ volatile int delta_data_set_ready :1;
+ volatile int trailing_edge_ring_indicator :1;
+ volatile int delta_data_carrier_detect :1;
+ volatile int clear_to_send :1;
+ volatile int data_set_ready :1;
+ volatile int ring_indicator :1;
+ volatile int data_carrier_detect :1;
+ } MSR;
+
+ register_t scratch;
+};
+
+
+// setup functions (wrappers)
+void usart_set_baudrate(uint16_t baudrate);
+void usart_set_parity(int mode);
+void usart_set_stop_bits(int count);
+void usart_set_word_length(int length);
+void usart_set_autoflow(int mode);
+
+inline void usart_init(uint16_t baudrate, int parity, int stop_bits);
+
+void usart_transmit(uint8_t data);
+uint8_t usart_receive();
+
+int usart_write(uint8_t *data, size_t size);
+int usart_read(uint8_t *buffer, size_t count);
+
+#endif // __USART__H__
diff --git a/sw/z80/kernel/kernel.c b/sw/z80/kernel/kernel.c
index fe87c3d..3d5aeb6 100644
--- a/sw/z80/kernel/kernel.c
+++ b/sw/z80/kernel/kernel.c
@@ -1,10 +1,7 @@
#include "types.h"
+#include "usart.h"
-
-void main(void)
+void kmain(void)
{
- int i, j = 20;
- for (i = 0; i < 10; i++) {
- j--;
- }
+ usart_init(USART_BAUDRATE_9600, USART_PARITY_EVEN, USART_STOP_BITS_1);
}
diff --git a/sw/z80/kernel/pio.c b/sw/z80/kernel/pio.c
new file mode 100644
index 0000000..4b9caee
--- /dev/null
+++ b/sw/z80/kernel/pio.c
@@ -0,0 +1,18 @@
+#include "pio.h"
+
+static uint8_t *pio_port = (uint8_t *) ADDR_DEV_PIO;
+static uint8_t *pio_ctrl = (uint8_t *) (ADDR_DEV_PIO + 2);
+
+void _pio_data(int port, uint8_t data)
+{
+ *(pio_port + port) = data;
+}
+
+void _pio_command(int port, uint8_t cmd)
+{
+ *(pio_ctrl + port) = cmd;
+}
+
+void pio_set_mode(int port, int mode)
+{
+}
diff --git a/sw/z80/kernel/usart.c b/sw/z80/kernel/usart.c
new file mode 100644
index 0000000..9ec6dbd
--- /dev/null
+++ b/sw/z80/kernel/usart.c
@@ -0,0 +1,91 @@
+#include "usart.h"
+
+static struct _usart_device *_usart = (struct _usart_device *) ADDR_DEV_USART;
+
+void usart_set_baudrate(uint16_t baudrate)
+{
+ // enable latch access
+ _usart->LCR.divisor_latch_access = 1;
+ _usart->buffer = 0x00FF & baudrate; // LSBs
+ memcpy(&_usart->IER, &(baudrate >>8), 1);
+ // _usart->IER = 0x00FF & (baudrate >> 8); // MSBs
+ _usart->LCR.divisor_latch_access = 0;
+}
+
+void usart_set_parity(int mode)
+{
+ if (mode == USART_PARITY_EVEN) {
+ _usart->LCR.even_parity = 1;
+ }
+ else if (mode == USART_PARITY_ODD) {
+ _usart->LCR.even_parity = 0;
+ }
+
+ _usart->LCR.parity = (mode == USART_PARITY_NONE) ? 0 : 1;
+}
+
+void usart_set_stop_bits(int count)
+{
+ _usart->LCR.stop_bits = (count == USART_STOP_BITS_1) ? 0 : 1;
+}
+
+void usart_word_length(int length)
+{
+ _usart->LCR.word_length = length;
+}
+
+void usart_set_autoflow(int mode)
+{
+ _usart->MCR.autoflow = (mode == USART_AUTOFLOW_OFF) ? 0 : 1;
+ _usart->MCR.data_terminal_ready = (mode == USART_AUTOFLOW_ALL);
+}
+
+inline void usart_init(uint16_t baudrate, int parity, int stop_bits)
+{
+ usart_set_baudrate(baudrate);
+ usart_set_parity(parity);
+ usart_set_stop_bits(stop_bits);
+ usart_set_autoflow(USART_AUTOFLOW_OFF);
+}
+
+void usart_transmit(uint8_t data)
+{
+ _usart->buffer = data;
+ while (_usart->LSR.transmitter_holder_empty == 0); // wait
+}
+
+uint8_t usart_receive()
+{
+ return _usart->buffer;
+}
+
+int usart_write(uint8_t *data, size_t size)
+{
+ uint8_t *dp = data;
+
+ while (size--) {
+ _usart->buffer = *(dp++);
+ while (_usart->LSR.transmitter_empty);
+ }
+
+ // TODO: do something that actually counts for sent bytes
+ return size;
+}
+
+int usart_read(uint8_t *buffer, size_t count)
+{
+ uint8_t *bp = buffer;
+ size_t read_count = 0;
+
+ while (count--) {
+ *(bp++) = _usart->buffer;
+ // check for errors
+ if (_usart->LSR.framing_error || _usart->LSR.parity_error) {
+ bp--; // delete last byte (?)
+ } else {
+ read_count++;
+ }
+ }
+
+ return read_count;
+}
diff --git a/sw/z80/libc/include/stdio.h b/sw/z80/libc/include/stdio.h
new file mode 100644
index 0000000..b31cdfd
--- /dev/null
+++ b/sw/z80/libc/include/stdio.h
@@ -0,0 +1,11 @@
+#ifndef __STDIO_H__
+#define __STDIO_H__
+
+#include "types.h"
+
+extern uint8_t *stdout, stderr;
+
+void putc(char ch, uint8_t *buffer);
+int printf(const char *fmt, ...);
+
+#endif
diff --git a/sw/z80/libc/include/string.h b/sw/z80/libc/include/string.h
new file mode 100644
index 0000000..f224c87
--- /dev/null
+++ b/sw/z80/libc/include/string.h
@@ -0,0 +1,8 @@
+#ifndef __STRING_H__
+#define __STRING_H__
+
+#include "types.h"
+
+void *memcpy(void *dest, const void *src, size_t n);
+
+#endif
diff --git a/sw/z80/libc/include/sysio.h b/sw/z80/libc/include/sysio.h
new file mode 100644
index 0000000..5d1f5ae
--- /dev/null
+++ b/sw/z80/libc/include/sysio.h
@@ -0,0 +1,55 @@
+#ifndef __SYSIO_H__
+#define __SYSIO_H__
+
+#include "types.h"
+
+/*
+* Memory management
+*/
+
+void * malloc(uint16_t size);
+uint16_t malloc_size(void * address);
+void free(void * address);
+
+/*
+* File management
+*/
+
+#define F_WRITE "w"
+#define F_READ "r"
+#define F_BIN_WRITE "wb"
+#define F_BIN_READ "rb"
+
+#define F_READ_CODE 0x0
+#define F_WRITE_CODE 0x1
+#define F_BIN_READ_CODE 0x2
+#define F_BIN_WRITE_CODE 0x3
+
+#define F_PERM_READ 0x0
+#define F_PERM_WRITE 0x1
+#define F_PERM_RW 0x2
+
+struct file {
+
+ const char * path;
+ unsigned int mode:4;
+ unsigned int permission:4;
+};
+
+#define FILE struct file
+
+FILE * fopen(const char * path, const char * mode);
+uint8_t fclose(FILE * file);
+
+// TODO: other functions
+
+/*
+* Processes management
+*/
+
+#define PID uint16_t
+
+void exit(); // exit this program
+void interrupt(PID)
+
+#endif \ No newline at end of file
diff --git a/sw/z80/libc/stdio.c b/sw/z80/libc/stdio.c
new file mode 100644
index 0000000..c2548d6
--- /dev/null
+++ b/sw/z80/libc/stdio.c
@@ -0,0 +1,12 @@
+#include "stdio.h"
+
+void putc(char ch, uint8_t *buffer)
+{
+ *buffer = ch;
+ *(++buffer) = '\0';
+}
+
+
+int printf(const char *fmt, ...)
+{
+}
diff --git a/sw/z80/libc/string.c b/sw/z80/libc/string.c
new file mode 100644
index 0000000..fd6a7ff
--- /dev/null
+++ b/sw/z80/libc/string.c
@@ -0,0 +1,13 @@
+#include "string.h"
+
+void *memcpy(void *dest, void *src, size_t n)
+{
+ char *dp = dest;
+ char *sp = src;
+
+ while (n--) {
+ *dp++ = *sp++;
+ }
+
+ return dest;
+}
diff --git a/sw/z80/makefile b/sw/z80/makefile
index ecdd9a4..3d682ca 100644
--- a/sw/z80/makefile
+++ b/sw/z80/makefile
@@ -4,6 +4,7 @@
OSNAME := helvetiOS
CSOURCES := $(wildcard kernel/*.c) $(wildcard libc/*.c)
+OBJECTS := $(patsubst %.c,build/%.rel,$(CSOURCES))
HEXFILE := build/$(OSNAME).hex
BINARY := build/$(OSNAME).bin
@@ -12,26 +13,33 @@ BINARY := build/$(OSNAME).bin
CC := sdcc
-CFLAGS := -mz80 --no-std-crt0 crt0.rel \
+CFLAGS := -mz80 \
-I kernel/include -I libc/include -DDEBUG
-LDFLAGS := --code-loc 0x0800 --data-loc 0x8000
+LDFLAGS := -mz80 --no-std-crt0 crt0.rel \
+ --code-loc 0x0800 --data-loc 0x8000
+.PHONY: dirs dis clean
all: $(BINARY)
# build binary
-$(BINARY): $(CSOURCES) crt0.rel
- mkdir -p build
- $(CC) $(CFLAGS) $(LDFLSGS) $(CSOURCES) -o $(HEXFILE)
+$(BINARY): $(OBJECTS) dirs
+ $(CC) $(LDFLAGS) $(OBJECTS) -o $(HEXFILE)
xxd -r -p $(HEXFILE) $(BINARY)
+$(OBJECTS): build/%.rel : %.c $(CSOURCES) dirs crt0.rel
+ $(CC) $(CFLAGS) -c $< -o $@
+
crt0.rel: crt0.s
sdasz80 -o $<
+dirs:
+ mkdir -p build build/kernel build/libc
+
dis: $(BINARY)
z80dasm -a -g 0h $< -o $(OSNAME).s
clean:
- - rm build/*
+ - rm -rd build/*
- rm $(OSNAME).s
- rm crt0.rel