merge branch 'atlas' into naopross

17 files changed, 862 insertions, 0 deletions

diff --git a/sw/z80/build/helvetiOS.lk b/sw/z80/build/helvetiOS.lk
new file mode 100644
index 0000000..c16247f
--- /dev/null
+++ b/sw/z80/build/helvetiOS.lk
@@ -0,0 +1,11 @@
+-mjwx
+-i build/helvetiOS.hex
+-b _CODE = 0x0800
+-b _DATA = 0x8000
+-k /usr/bin/../share/sdcc/lib/z80
+-k /usr/share/sdcc/lib/z80
+-l z80
+crt0.rel
+build/kernel/kernel.rel
+
+-e
diff --git a/sw/z80/build/helvetiOS.map b/sw/z80/build/helvetiOS.map
new file mode 100644
index 0000000..98210c7
--- /dev/null
+++ b/sw/z80/build/helvetiOS.map
@@ -0,0 +1,182 @@
+ASxxxx Linker V03.00 + NoICE + sdld,  page 1.
+Hexadecimal  [32-Bits]
+
+Area                                    Addr        Size        Decimal Bytes (Attributes)
+--------------------------------        ----        ----        ------- ----- ------------
+.  .ABS.                            00000000    00000000 =           0. bytes (ABS,CON)
+
+      Value  Global                              Global Defined In Module
+      -----  --------------------------------   ------------------------
+     00000000  .__.ABS.                           kernel
+     00000000  l__BSEG                         
+     00000000  l__BSS                          
+     00000000  l__CABS                         
+     00000000  l__DABS                         
+     00000000  l__DATA                         
+     00000000  l__HEADER                       
+     00000000  l__HEAP                         
+     00000000  l__HOME                         
+     00000000  l__INITIALIZED                  
+     00000000  l__INITIALIZER                  
+     00000000  s__CABS                         
+     00000000  s__DABS                         
+     00000000  s__HEADER                       
+     00000000  s__HEADER0                      
+     00000000  s__HEADER1                      
+     00000000  s__HEADER2                      
+     00000000  s__HEADER3                      
+     00000000  s__HEADER4                      
+     00000000  s__HEADER5                      
+     00000000  s__HEADER6                      
+     00000000  s__HEADER7                      
+     00000000  s__HEADER8                      
+     00000001  l__GSFINAL                      
+     00000002  l__HEADER1                      
+     00000002  l__HEADER2                      
+     00000002  l__HEADER3                      
+     00000002  l__HEADER4                      
+     00000002  l__HEADER5                      
+     00000002  l__HEADER6                      
+     00000002  l__HEADER7                      
+     00000003  l__HEADER0                      
+     00000006  l__GSINIT                       
+     0000000C  l__HEADER8                      
+     00000017  l__CODE                         
+     00000800  s__CODE                         
+     00000817  s__GSINIT                       
+     00000817  s__HOME                         
+     00000817  s__INITIALIZER                  
+     0000081D  s__GSFINAL                      
+     00008000  s__BSEG                         
+     00008000  s__BSS                          
+     00008000  s__DATA                         
+     00008000  s__HEAP                         
+     00008000  s__INITIALIZED                  
+ASxxxx Linker V03.00 + NoICE + sdld,  page 2.
+Hexadecimal  [32-Bits]
+
+Area                                    Addr        Size        Decimal Bytes (Attributes)
+--------------------------------        ----        ----        ------- ----- ------------
+_CODE                               00000800    00000017 =          23. bytes (REL,CON)
+
+      Value  Global                              Global Defined In Module
+      -----  --------------------------------   ------------------------
+     00000800  __clock                            crt0
+     00000804  _exit                              crt0
+     0000080A  _main                              kernel
+ASxxxx Linker V03.00 + NoICE + sdld,  page 3.
+Hexadecimal  [32-Bits]
+
+Area                                    Addr        Size        Decimal Bytes (Attributes)
+--------------------------------        ----        ----        ------- ----- ------------
+_HEADER0                            00000000    00000003 =           3. bytes (ABS,CON)
+
+      Value  Global                              Global Defined In Module
+      -----  --------------------------------   ------------------------
+ASxxxx Linker V03.00 + NoICE + sdld,  page 4.
+Hexadecimal  [32-Bits]
+
+Area                                    Addr        Size        Decimal Bytes (Attributes)
+--------------------------------        ----        ----        ------- ----- ------------
+_HEADER1                            00000000    00000002 =           2. bytes (ABS,CON)
+
+      Value  Global                              Global Defined In Module
+      -----  --------------------------------   ------------------------
+ASxxxx Linker V03.00 + NoICE + sdld,  page 5.
+Hexadecimal  [32-Bits]
+
+Area                                    Addr        Size        Decimal Bytes (Attributes)
+--------------------------------        ----        ----        ------- ----- ------------
+_HEADER2                            00000000    00000002 =           2. bytes (ABS,CON)
+
+      Value  Global                              Global Defined In Module
+      -----  --------------------------------   ------------------------
+ASxxxx Linker V03.00 + NoICE + sdld,  page 6.
+Hexadecimal  [32-Bits]
+
+Area                                    Addr        Size        Decimal Bytes (Attributes)
+--------------------------------        ----        ----        ------- ----- ------------
+_HEADER3                            00000000    00000002 =           2. bytes (ABS,CON)
+
+      Value  Global                              Global Defined In Module
+      -----  --------------------------------   ------------------------
+ASxxxx Linker V03.00 + NoICE + sdld,  page 7.
+Hexadecimal  [32-Bits]
+
+Area                                    Addr        Size        Decimal Bytes (Attributes)
+--------------------------------        ----        ----        ------- ----- ------------
+_HEADER4                            00000000    00000002 =           2. bytes (ABS,CON)
+
+      Value  Global                              Global Defined In Module
+      -----  --------------------------------   ------------------------
+ASxxxx Linker V03.00 + NoICE + sdld,  page 8.
+Hexadecimal  [32-Bits]
+
+Area                                    Addr        Size        Decimal Bytes (Attributes)
+--------------------------------        ----        ----        ------- ----- ------------
+_HEADER5                            00000000    00000002 =           2. bytes (ABS,CON)
+
+      Value  Global                              Global Defined In Module
+      -----  --------------------------------   ------------------------
+ASxxxx Linker V03.00 + NoICE + sdld,  page 9.
+Hexadecimal  [32-Bits]
+
+Area                                    Addr        Size        Decimal Bytes (Attributes)
+--------------------------------        ----        ----        ------- ----- ------------
+_HEADER6                            00000000    00000002 =           2. bytes (ABS,CON)
+
+      Value  Global                              Global Defined In Module
+      -----  --------------------------------   ------------------------
+ASxxxx Linker V03.00 + NoICE + sdld,  page 10.
+Hexadecimal  [32-Bits]
+
+Area                                    Addr        Size        Decimal Bytes (Attributes)
+--------------------------------        ----        ----        ------- ----- ------------
+_HEADER7                            00000000    00000002 =           2. bytes (ABS,CON)
+
+      Value  Global                              Global Defined In Module
+      -----  --------------------------------   ------------------------
+ASxxxx Linker V03.00 + NoICE + sdld,  page 11.
+Hexadecimal  [32-Bits]
+
+Area                                    Addr        Size        Decimal Bytes (Attributes)
+--------------------------------        ----        ----        ------- ----- ------------
+_HEADER8                            00000000    0000000C =          12. bytes (ABS,CON)
+
+      Value  Global                              Global Defined In Module
+      -----  --------------------------------   ------------------------
+ASxxxx Linker V03.00 + NoICE + sdld,  page 12.
+Hexadecimal  [32-Bits]
+
+Area                                    Addr        Size        Decimal Bytes (Attributes)
+--------------------------------        ----        ----        ------- ----- ------------
+_GSINIT                             00000817    00000006 =           6. bytes (REL,CON)
+
+      Value  Global                              Global Defined In Module
+      -----  --------------------------------   ------------------------
+     00000817  gsinit                             crt0
+
+ASxxxx Linker V03.00 + NoICE + sdld,  page 13.
+Hexadecimal  [32-Bits]
+
+Area                                    Addr        Size        Decimal Bytes (Attributes)
+--------------------------------        ----        ----        ------- ----- ------------
+_GSFINAL                            0000081D    00000001 =           1. bytes (REL,CON)
+
+      Value  Global                              Global Defined In Module
+      -----  --------------------------------   ------------------------
+ASxxxx Linker V03.00 + NoICE + sdld,  page 14.
+
+Files Linked                              [ module(s) ]
+
+crt0.rel                                  [ crt0 ]
+build/kernel/kernel.rel                   [ kernel ]
+
+ASxxxx Linker V03.00 + NoICE + sdld,  page 15.
+
+User Base Address Definitions
+
+_CODE = 0x0800
+_DATA = 0x8000
+
+
\ No newline at end of file
diff --git a/sw/z80/build/helvetiOS.noi b/sw/z80/build/helvetiOS.noi
new file mode 100644
index 0000000..1b9c284
--- /dev/null
+++ b/sw/z80/build/helvetiOS.noi
@@ -0,0 +1,50 @@
+DEF .__.ABS. 0x0
+DEF l__BSEG 0x0
+DEF l__BSS 0x0
+DEF l__CABS 0x0
+DEF l__DABS 0x0
+DEF l__DATA 0x0
+DEF l__HEADER 0x0
+DEF l__HEAP 0x0
+DEF l__HOME 0x0
+DEF l__INITIALIZED 0x0
+DEF l__INITIALIZER 0x0
+DEF s__CABS 0x0
+DEF s__DABS 0x0
+DEF s__HEADER 0x0
+DEF s__HEADER0 0x0
+DEF s__HEADER1 0x0
+DEF s__HEADER2 0x0
+DEF s__HEADER3 0x0
+DEF s__HEADER4 0x0
+DEF s__HEADER5 0x0
+DEF s__HEADER6 0x0
+DEF s__HEADER7 0x0
+DEF s__HEADER8 0x0
+DEF l__GSFINAL 0x1
+DEF l__HEADER1 0x2
+DEF l__HEADER2 0x2
+DEF l__HEADER3 0x2
+DEF l__HEADER4 0x2
+DEF l__HEADER5 0x2
+DEF l__HEADER6 0x2
+DEF l__HEADER7 0x2
+DEF l__HEADER0 0x3
+DEF l__GSINIT 0x6
+DEF l__HEADER8 0xC
+DEF l__CODE 0x17
+DEF s__CODE 0x800
+DEF s__GSINIT 0x817
+DEF s__HOME 0x817
+DEF s__INITIALIZER 0x817
+DEF s__GSFINAL 0x81D
+DEF s__BSEG 0x8000
+DEF s__BSS 0x8000
+DEF s__DATA 0x8000
+DEF s__HEAP 0x8000
+DEF s__INITIALIZED 0x8000
+DEF __clock 0x800
+DEF _exit 0x804
+DEF _main 0x80A
+DEF gsinit 0x817
+LOAD build/helvetiOS.ihx
diff --git a/sw/z80/build/kernel/kernel.asm b/sw/z80/build/kernel/kernel.asm
new file mode 100644
index 0000000..a29db4d
--- /dev/null
+++ b/sw/z80/build/kernel/kernel.asm
@@ -0,0 +1,65 @@
+;--------------------------------------------------------
+; File Created by SDCC : free open source ANSI-C Compiler
+; Version 3.5.0 #9253 (Mar 24 2016) (Linux)
+; This file was generated Tue May  2 18:13:35 2017
+;--------------------------------------------------------
+	.module kernel
+	.optsdcc -mz80
+	
+;--------------------------------------------------------
+; Public variables in this module
+;--------------------------------------------------------
+	.globl _main
+;--------------------------------------------------------
+; special function registers
+;--------------------------------------------------------
+;--------------------------------------------------------
+; ram data
+;--------------------------------------------------------
+	.area _DATA
+;--------------------------------------------------------
+; ram data
+;--------------------------------------------------------
+	.area _INITIALIZED
+;--------------------------------------------------------
+; absolute external ram data
+;--------------------------------------------------------
+	.area _DABS (ABS)
+;--------------------------------------------------------
+; global & static initialisations
+;--------------------------------------------------------
+	.area _HOME
+	.area _GSINIT
+	.area _GSFINAL
+	.area _GSINIT
+;--------------------------------------------------------
+; Home
+;--------------------------------------------------------
+	.area _HOME
+	.area _HOME
+;--------------------------------------------------------
+; code
+;--------------------------------------------------------
+	.area _CODE
+;kernel/kernel.c:4: void main(void)
+;	---------------------------------
+; Function main
+; ---------------------------------
+_main::
+;kernel/kernel.c:7: for (i = 0; i < 10; i++) {
+	ld	de,#0x000A
+00104$:
+;kernel/kernel.c:8: j--;
+	ld	c,e
+	ld	b,d
+	dec	bc
+	ld	e, c
+;kernel/kernel.c:7: for (i = 0; i < 10; i++) {
+	ld	a,b
+	ld	d,a
+	or	a,c
+	jr	NZ,00104$
+	ret
+	.area _CODE
+	.area _INITIALIZER
+	.area _CABS (ABS)
diff --git a/sw/z80/build/kernel/kernel.lst b/sw/z80/build/kernel/kernel.lst
new file mode 100644
index 0000000..8ec7438
--- /dev/null
+++ b/sw/z80/build/kernel/kernel.lst
@@ -0,0 +1,65 @@
+                              1 ;--------------------------------------------------------
+                              2 ; File Created by SDCC : free open source ANSI-C Compiler
+                              3 ; Version 3.5.0 #9253 (Mar 24 2016) (Linux)
+                              4 ; This file was generated Tue May  2 18:13:35 2017
+                              5 ;--------------------------------------------------------
+                              6 	.module kernel
+                              7 	.optsdcc -mz80
+                              8 	
+                              9 ;--------------------------------------------------------
+                             10 ; Public variables in this module
+                             11 ;--------------------------------------------------------
+                             12 	.globl _main
+                             13 ;--------------------------------------------------------
+                             14 ; special function registers
+                             15 ;--------------------------------------------------------
+                             16 ;--------------------------------------------------------
+                             17 ; ram data
+                             18 ;--------------------------------------------------------
+                             19 	.area _DATA
+                             20 ;--------------------------------------------------------
+                             21 ; ram data
+                             22 ;--------------------------------------------------------
+                             23 	.area _INITIALIZED
+                             24 ;--------------------------------------------------------
+                             25 ; absolute external ram data
+                             26 ;--------------------------------------------------------
+                             27 	.area _DABS (ABS)
+                             28 ;--------------------------------------------------------
+                             29 ; global & static initialisations
+                             30 ;--------------------------------------------------------
+                             31 	.area _HOME
+                             32 	.area _GSINIT
+                             33 	.area _GSFINAL
+                             34 	.area _GSINIT
+                             35 ;--------------------------------------------------------
+                             36 ; Home
+                             37 ;--------------------------------------------------------
+                             38 	.area _HOME
+                             39 	.area _HOME
+                             40 ;--------------------------------------------------------
+                             41 ; code
+                             42 ;--------------------------------------------------------
+                             43 	.area _CODE
+                             44 ;kernel/kernel.c:4: void main(void)
+                             45 ;	---------------------------------
+                             46 ; Function main
+                             47 ; ---------------------------------
+   0000                      48 _main::
+                             49 ;kernel/kernel.c:7: for (i = 0; i < 10; i++) {
+   0000 11 0A 00      [10]   50 	ld	de,#0x000A
+   0003                      51 00104$:
+                             52 ;kernel/kernel.c:8: j--;
+   0003 4B            [ 4]   53 	ld	c,e
+   0004 42            [ 4]   54 	ld	b,d
+   0005 0B            [ 6]   55 	dec	bc
+   0006 59            [ 4]   56 	ld	e, c
+                             57 ;kernel/kernel.c:7: for (i = 0; i < 10; i++) {
+   0007 78            [ 4]   58 	ld	a,b
+   0008 57            [ 4]   59 	ld	d,a
+   0009 B1            [ 4]   60 	or	a,c
+   000A 20 F7         [12]   61 	jr	NZ,00104$
+   000C C9            [10]   62 	ret
+                             63 	.area _CODE
+                             64 	.area _INITIALIZER
+                             65 	.area _CABS (ABS)
diff --git a/sw/z80/build/kernel/kernel.rel b/sw/z80/build/kernel/kernel.rel
new file mode 100644
index 0000000..1079edc
--- /dev/null
+++ b/sw/z80/build/kernel/kernel.rel
@@ -0,0 +1,23 @@
+XL2
+H 9 areas 2 global symbols
+M kernel
+O -mz80
+S .__.ABS. Def0000
+A _CODE size D flags 0 addr 0
+S _main Def0000
+A _DATA size 0 flags 0 addr 0
+A _INITIALIZED size 0 flags 0 addr 0
+A _DABS size 0 flags 8 addr 0
+A _HOME size 0 flags 0 addr 0
+A _GSINIT size 0 flags 0 addr 0
+A _GSFINAL size 0 flags 0 addr 0
+A _INITIALIZER size 0 flags 0 addr 0
+A _CABS size 0 flags 8 addr 0
+T 00 00
+R 00 00 00 00
+T 00 00 11 0A 00
+R 00 00 00 00
+T 03 00
+R 00 00 00 00
+T 03 00 4B 42 0B 59 78 57 B1 20 F7 C9
+R 00 00 00 00
diff --git a/sw/z80/build/kernel/kernel.sym b/sw/z80/build/kernel/kernel.sym
new file mode 100644
index 0000000..d01735c
--- /dev/null
+++ b/sw/z80/build/kernel/kernel.sym
@@ -0,0 +1,27 @@
+ASxxxx Assembler V02.00 + NoICE + SDCC mods  (Zilog Z80 / Hitachi HD64180), page 1.
+Hexadecimal [16-Bits]
+
+Symbol Table
+
+    .__.$$$.                                                    =  2710 L
+    .__.ABS.                                                    =  0000 G
+    .__.CPU.                                                    =  0000 L
+    .__.H$L.                                                    =  0000 L
+  0 _main                                                          0000 GR
+
+
+ASxxxx Assembler V02.00 + NoICE + SDCC mods  (Zilog Z80 / Hitachi HD64180), page 2.
+Hexadecimal [16-Bits]
+
+Area Table
+
+   0 _CODE                                      size    D   flags    0
+   1 _DATA                                      size    0   flags    0
+   2 _INITIALIZED                               size    0   flags    0
+   3 _DABS                                      size    0   flags    8
+   4 _HOME                                      size    0   flags    0
+   5 _GSINIT                                    size    0   flags    0
+   6 _GSFINAL                                   size    0   flags    0
+   7 _INITIALIZER                               size    0   flags    0
+   8 _CABS                                      size    0   flags    8
+
diff --git a/sw/z80/crt0.rel b/sw/z80/crt0.rel
new file mode 100644
index 0000000..809c0e6
--- /dev/null
+++ b/sw/z80/crt0.rel
@@ -0,0 +1,86 @@
+XL2
+H 14 areas 5 global symbols
+M crt0
+S _main Ref0000
+S .__.ABS. Def0000
+A _CODE size A flags 0 addr 0
+S __clock Def0000
+S _exit Def0004
+A _HEADER size 0 flags 8 addr 0
+A _HEADER0 size 3 flags 8 addr 0
+A _HEADER1 size 2 flags 8 addr 8
+A _HEADER2 size 2 flags 8 addr 10
+A _HEADER3 size 2 flags 8 addr 18
+A _HEADER4 size 2 flags 8 addr 20
+A _HEADER5 size 2 flags 8 addr 28
+A _HEADER6 size 2 flags 8 addr 30
+A _HEADER7 size 2 flags 8 addr 38
+A _HEADER8 size C flags 8 addr 100
+A _HOME size 0 flags 0 addr 0
+A _INITIALIZER size 0 flags 0 addr 0
+A _GSINIT size 6 flags 0 addr 0
+S gsinit Def0000
+A _GSFINAL size 1 flags 0 addr 0
+A _DATA size 0 flags 0 addr 0
+A _INITIALIZED size 0 flags 0 addr 0
+A _BSEG size 0 flags 0 addr 0
+A _BSS size 0 flags 0 addr 0
+A _HEAP size 0 flags 0 addr 0
+T 00 00
+R 00 00 02 00
+T 00 00 C3 00 01
+R 00 00 02 00 00 03 0A 00
+T 08 00
+R 00 00 03 00
+T 08 00 ED 4D
+R 00 00 03 00
+T 10 00
+R 00 00 04 00
+T 10 00 ED 4D
+R 00 00 04 00
+T 18 00
+R 00 00 05 00
+T 18 00 ED 4D
+R 00 00 05 00
+T 20 00
+R 00 00 06 00
+T 20 00 ED 4D
+R 00 00 06 00
+T 28 00
+R 00 00 07 00
+T 28 00 ED 4D
+R 00 00 07 00
+T 30 00
+R 00 00 08 00
+T 30 00 ED 4D
+R 00 00 08 00
+T 38 00
+R 00 00 09 00
+T 38 00 ED 4D
+R 00 00 09 00
+T 00 01
+R 00 00 0A 00
+T 00 01
+R 00 00 0A 00
+T 00 01 31 FF FF CD 00 00 CD 00 00 C3 04 00
+R 00 00 0A 00 00 06 0D 00 02 09 00 00 00 0C 00 00
+T 00 00
+R 00 00 00 00
+T 00 00 3E 02 CF C9
+R 00 00 00 00
+T 04 00
+R 00 00 00 00
+T 04 00 3E 00 CF
+R 00 00 00 00
+T 07 00
+R 00 00 00 00
+T 07 00 76 18 FD
+R 00 00 00 00
+T 00 00
+R 00 00 0D 00
+T 00 00 78 B1 28 02 ED B0
+R 00 00 0D 00
+T 06 00
+R 00 00 0D 00
+T 00 00 C9
+R 00 00 0E 00
diff --git a/sw/z80/kernel/include/login.h b/sw/z80/kernel/include/login.h
new file mode 100644
index 0000000..5fa4b5e
--- /dev/null
+++ b/sw/z80/kernel/include/login.h
@@ -0,0 +1,23 @@
+#ifndef LOGIN_H
+#define LOGIN_H
+
+#include "types.h"
+
+#define LOGIN_PC    // TODO find an address in ROM, to perform jumps
+
+#define PWD_ADDR // TODO find an address in ROM, password
+#define PWD_SIZE 8
+
+/*
+*   It returns 1 if succeded, otherwise 0
+*/
+
+int8_t authenticate(const char *pwd);
+
+/*
+*   It sets the password in the ROM space, maximum 8 characters
+*/
+
+void set_pwd(const char *pwd);
+
+#endif
\ No newline at end of file
diff --git a/sw/z80/kernel/include/progman.h b/sw/z80/kernel/include/progman.h
new file mode 100644
index 0000000..b59e14a
--- /dev/null
+++ b/sw/z80/kernel/include/progman.h
@@ -0,0 +1,109 @@
+#ifndef PROGRAM_MAN
+#define PROGRAM_MAN
+
+#include "types.h"
+
+#define PROG_0 0x0
+#define PROG_1 0x1
+
+#define PROG_VSTART 0x1000
+#define PROG_0_PREFIX 0xA000
+#define PROG_1_PREFIX 0xC000
+
+#define PROG_0_INFO     // TODO
+#define PROG_1_INFO     // TODO find a space in the ram
+
+struct prog_status {
+
+    // The program is in execution
+
+    uint8_t running:1;
+
+    // The program is executing its quit callback
+
+    uint8_t exiting:1;
+
+    uint8_t unused:6;  // TODO, find a usage for these bits
+}:
+
+struct prog_data {
+
+    struct prog_status status;
+
+    /*
+    *   The following addresses are needed to map 
+    *   map the usable memory for dynamic allocations
+    */
+
+    // Virtual address of the heap
+
+    uint8_t heap_addr:12;
+
+    // Virtual address of the stack limit
+
+    uint8_t stack_limit:12;
+
+    /*
+    *   Function called when the program exits normally
+    */
+
+    void (*quit_cb)(void);   // 16
+};
+
+/*
+*   Initialize the program manager system
+*/
+
+void progman_init();
+
+/*  
+*   Check if it can start a new program
+*   If it succedes, the program id is returned,
+*   otherwise it is returned an error number
+*
+*   ! Disable virtual addresses when this function is called
+*/
+
+#define PROG_REQ_FULL -1
+
+int8_t prog_req();
+
+/*
+*   It allocates a program in the RAM
+*   To obtain the right id call prog_req() first
+*   Basic informations must be allocated and referenced by a program_base struct
+*
+*   ! Disable virtual addresses when this function is called
+*/
+
+struct prog_space {
+
+    void * inst_set;    // pointer to the instructions set
+    size_t inst_size;   // size of the instructions set
+    void * bss_data;    // pointer to the bss/data space
+    size_t data_size;   // size of the bss/data space
+};
+
+void prog_alloc(int8_t id, struct prog_data *data, const struct prog_space *space);
+
+/*
+*   It jumps the program counter to the given one
+*/
+
+void prog_exec(int8_t id, struct prog_data *data);
+
+/*
+*   It sets a quit callback
+*/
+
+void prog_0_set_qcb(void (*callback)(void));
+void prog_1_set_qcb(void (*callback)(void));
+
+/*
+*   It quits a program, if a callback is set, it will be called
+*/
+
+void prog_0_quit(uint8_t force);
+void prog_1_quit(uint8_t force);
+
+#endif
\ No newline at end of file
diff --git a/sw/z80/kernel/include/syscall.h b/sw/z80/kernel/include/syscall.h
new file mode 100644
index 0000000..9641f25
--- /dev/null
+++ b/sw/z80/kernel/include/syscall.h
@@ -0,0 +1,20 @@
+#ifndef SYS_CALL
+#define SYS_CALL
+
+/*
+*   Enable / disable virtual address traslation
+*/
+
+extern void v_addr(uint8_t flag);
+
+/*
+*   Programs execution
+*/
+
+extern void prog_exec_0(void);
+extern void prog_exec_1(void);
+
+extern void prog_stop_0(void);
+extern void prog_stop_1(void);
+
+#endif
\ No newline at end of file
diff --git a/sw/z80/kernel/include/sysexe.h b/sw/z80/kernel/include/sysexe.h
new file mode 100644
index 0000000..9c13c09
--- /dev/null
+++ b/sw/z80/kernel/include/sysexe.h
@@ -0,0 +1,55 @@
+#ifndef SYS_EXE
+#define SYS_EXE
+
+#define SYS_EXEC_ADDR // TODO find an address in Kernel space
+
+struct sys_progman {
+
+    // program 0 enabled
+
+    uint8_t prog_0_enabled:1;
+
+    // program 1 enabled
+
+    /*
+    *   Obs: A program is enabled when its space is allocated 
+    *        and its virtual program counter is stored in 
+    *        the hardware or in the silent_pc.
+    *        An enabled program is not necessarly running, it 
+    *        could be paused too.
+    */
+
+    uint8_t prog_1_enabled:1;
+
+    // running's program id
+
+    uint8_t prog_running:1;
+};
+
+struct sys_exec {
+
+    /*
+    *   Virtual addresses are activated
+    */
+
+    uint8_t virtual_addr:1;
+
+    struct sys_progman progman;
+
+    /*
+    *   The silent_pc is the place designed to store the 
+    *   program counter of the program that's not running
+    */
+
+    uint8_t silent_pc:12;
+};
+
+/*
+*   Function to access informations
+*/
+
+uint8_t vaddr_enabled();
+
+struct sys_progman * sys_prog_data(struct sys_progman *data);
+
+#endif
\ No newline at end of file
diff --git a/sw/z80/kernel/login.c b/sw/z80/kernel/login.c
new file mode 100644
index 0000000..5e100bf
--- /dev/null
+++ b/sw/z80/kernel/login.c
@@ -0,0 +1,12 @@
+#include "login.h"
+#include "string.h"
+
+int8_t authenticate(const char *pwd) {
+
+    return !memcmp(PWD_ADDR, pwd, PWD_SIZE);
+}
+
+void set_pwd(const char *pwd) {
+
+    memcpy(PWD_ADDR, pwd, PWD_SIZE);
+}
\ No newline at end of file
diff --git a/sw/z80/kernel/progman.c b/sw/z80/kernel/progman.c
new file mode 100644
index 0000000..44888f8
--- /dev/null
+++ b/sw/z80/kernel/progman.c
@@ -0,0 +1,90 @@
+#include "progman.h"
+#include "string.h"
+#include "syscall.h"
+#include "sysexe.h"
+
+#define EMPTY_PROG_INFO 0x0
+
+volatile struct prog_data *prog_0 = PROG_0_INFO,
+                    *prog_1 = PROG_1_INFO;
+
+void progman_init() {
+
+    *prog_0 = EMPTY_PROG_INFO;
+    *prog_1 = EMPTY_PROG_INFO;
+
+    // TODO other stuff
+}
+
+int8_t prog_req() {
+
+    struct sys_progman data;
+
+    sys_prog_data(&data);
+
+    if (data.prog_0_enabled)
+        return PROG_0;
+    else if (data.prog_1_enabled)
+        return PROG_1;
+
+    return PROG_REQ_FULL;
+}
+
+void prog_alloc(int8_t id, struct prog_data *data, const struct prog_space *space) {
+
+    void *addr = (id ? PROG_1_PREFIX : PROG_0_PREFIX) + PROG_VSTART;
+
+    memcpy(addr, base->inst_set, base->inst_size);
+
+    addr += base->inst_size;
+
+    memcpy(addr, base->bss_data, base->data_size);
+
+    addr += base->data_size;
+
+    // TODO, empty heap and stack
+}
+
+void prog_exec(int8_t id, struct prog_data *data) {
+
+    if (id)
+        prog_exec_1();  // system call
+    else
+        prog_exec_0();  // system call
+}
+
+void prog_0_set_qcb(void (*callback)(void)) {
+
+    prog_0->quit_cb = callback;
+}
+
+void prog_1_set_qcb(void (*callback)(void)) {
+
+    prog_1->quit_cb = callback;
+}
+
+void prog_0_quit(uint8_t force) {
+    
+    if (!prog_0->enabled || prog_0->exiting)
+        return;
+
+    if (!force && prog_0->quit_cb)
+        prog_0->quit_cb();
+
+    *prog_0 = EMPTY_PROG_INFO;
+
+    prog_stop_0();  // system call
+}
+
+void prog_1_quit(uint8_t force) {
+    
+    if (!prog_1->enabled || prog_1->exiting)
+        return;
+
+    if (!force && prog_1->quit_cb)
+        prog_1->quit_cb();
+
+    *prog_1 = EMPTY_PROG_INFO;
+
+    prog_stop_1();  // system call
+}
\ No newline at end of file
diff --git a/sw/z80/kernel/sysexe.c b/sw/z80/kernel/sysexe.c
new file mode 100644
index 0000000..f020b88
--- /dev/null
+++ b/sw/z80/kernel/sysexe.c
@@ -0,0 +1,14 @@
+#include "sysexe.h"
+
+volatile struct sys_exec *exec_data = SYS_EXEC_ADDR;
+
+uint8_t vaddr_enabled() {
+
+    return exec_data->virtual_addr;
+}
+
+struct sys_progman * sys_prog_data(struct sys_progman *data) {
+
+    *data = exec_data->sys_progman;
+    return data;
+}
\ No newline at end of file
diff --git a/sw/z80/libc/include/string.h b/sw/z80/libc/include/string.h
index f224c87..9c002e3 100644
--- a/sw/z80/libc/include/string.h
+++ b/sw/z80/libc/include/string.h
@@ -3,6 +3,10 @@
 
 #include "types.h"
 
+void * memset(void *dest, const int8_t src, size_t n);
+
 void *memcpy(void *dest, const void *src, size_t n);
 
+int8_t memcmp(const void *s1, const void *s2, size_t n);
+
 #endif
diff --git a/sw/z80/libc/string.c b/sw/z80/libc/string.c
index fd6a7ff..9dd56cc 100644
--- a/sw/z80/libc/string.c
+++ b/sw/z80/libc/string.c
@@ -1,5 +1,15 @@
 #include "string.h"
 
+void * memset(void *dest, const int8_t src, size_t n) {
+
+    void *dp = dest;
+
+    while (n--)
+        *dp++ = src;
+
+    return dest;
+}
+
 void *memcpy(void *dest, void *src, size_t n)
 {
     char *dp = dest;
@@ -11,3 +21,19 @@ void *memcpy(void *dest, void *src, size_t n)
 
     return dest;
 }
+
+int8_t memcmp(const void *s1, const void *s2, size_t n) {
+
+    uint8_t u1, u2;
+
+    for ( ; n--; s1++, s2++) {
+
+        u1 = *s1;
+        u2 = *s2;
+
+        if (u1 != u2)
+            return u1 - u2;
+    }
+
+    return 0;
+}
\ No newline at end of file