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-rw-r--r--sw/z80/crt0.s103
-rw-r--r--sw/z80/crt0.s.old43
-rw-r--r--sw/z80/kernel.c7
-rw-r--r--sw/z80/kernel/include/types.h (renamed from sw/z80/types.h)2
-rw-r--r--sw/z80/kernel/kernel.c10
-rw-r--r--sw/z80/libc/mem.c7
-rw-r--r--sw/z80/loader.asm18
-rw-r--r--sw/z80/makefile42
-rw-r--r--sw/z80/serial.h15
-rw-r--r--sw/z80/zcc_opt.def6
10 files changed, 152 insertions, 101 deletions
diff --git a/sw/z80/crt0.s b/sw/z80/crt0.s
new file mode 100644
index 0000000..7701ca6
--- /dev/null
+++ b/sw/z80/crt0.s
@@ -0,0 +1,103 @@
+;--------------------------------------------------------------------------
+; 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 _main
+
+ .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 pointer directly above top of memory.
+ ld sp,#0xFFFF
+
+ ;; Initialise global variables
+ call gsinit
+ call _main
+ 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:
+
+ .area _GSFINAL
+ ret
+
diff --git a/sw/z80/crt0.s.old b/sw/z80/crt0.s.old
deleted file mode 100644
index f3bf8e8..0000000
--- a/sw/z80/crt0.s.old
+++ /dev/null
@@ -1,43 +0,0 @@
- .module crt0
- .globl _main
-
- .area _HEADER (ABS)
-;; reset vector
- .org 0x0000
- jp init
-
- .org 0x0100
-
-init:
-;; Stack at the top of memory.
- ld sp,#0xffff
-
- ;; initialise global variables
- call gsinit
- call _main
- jp _exit
-
- ;; Ordering of segments for the linker.
- .area _HOME
- .area _CODE
- .area _GSINIT
- .area _GSFINAL
-
- .area _DATA
- .area _BSS
- .area _HEAP
-
- .area _CODE
-__clock::
- ret
-
-_exit::
- ret
-
- .area _GSINIT
-
-gsinit::
-
-.area _GSFINAL
- ret
-
diff --git a/sw/z80/kernel.c b/sw/z80/kernel.c
deleted file mode 100644
index 172eee1..0000000
--- a/sw/z80/kernel.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include "types.h"
-
-
-void main(void)
-{
-
-}
diff --git a/sw/z80/types.h b/sw/z80/kernel/include/types.h
index adde214..c24b311 100644
--- a/sw/z80/types.h
+++ b/sw/z80/kernel/include/types.h
@@ -6,4 +6,6 @@
#define int16_t int
#define uint16_t unsigned int
+#define size_t uint16_t
+
#endif
diff --git a/sw/z80/kernel/kernel.c b/sw/z80/kernel/kernel.c
new file mode 100644
index 0000000..fe87c3d
--- /dev/null
+++ b/sw/z80/kernel/kernel.c
@@ -0,0 +1,10 @@
+#include "types.h"
+
+
+void main(void)
+{
+ int i, j = 20;
+ for (i = 0; i < 10; i++) {
+ j--;
+ }
+}
diff --git a/sw/z80/libc/mem.c b/sw/z80/libc/mem.c
new file mode 100644
index 0000000..667a752
--- /dev/null
+++ b/sw/z80/libc/mem.c
@@ -0,0 +1,7 @@
+#include "types.h"
+#include "mem.h"
+
+void *malloc(size_t size)
+{
+ :
+}
diff --git a/sw/z80/loader.asm b/sw/z80/loader.asm
deleted file mode 100644
index 85f5abe..0000000
--- a/sw/z80/loader.asm
+++ /dev/null
@@ -1,18 +0,0 @@
-; C crt0 loader
-;
- module crt0
-
-; general scope declarations
- extern _main ; C code
-
-; startup code
- org 0000h ; reset vector
- jp _start
-
-_start:
- ld sp, 0xffff
- call _main
- jp _exit
-
-_exit:
- ret
diff --git a/sw/z80/makefile b/sw/z80/makefile
index 94646a9..3d682ca 100644
--- a/sw/z80/makefile
+++ b/sw/z80/makefile
@@ -2,26 +2,44 @@
# source code settings
#
OSNAME := helvetiOS
-
-CSOURCES := $(wildcard *.c)
-BINARY := $(OSNAME).bin
+
+CSOURCES := $(wildcard kernel/*.c) $(wildcard libc/*.c)
+OBJECTS := $(patsubst %.c,build/%.rel,$(CSOURCES))
+HEXFILE := build/$(OSNAME).hex
+BINARY := build/$(OSNAME).bin
###
# compiler settings
-#
-CC := zcc
-CARGS := -Wall -I . -DDEBUG -crt0 loader -asm z80asm -nostdlib
+CC := sdcc
+
+CFLAGS := -mz80 \
+ -I kernel/include -I libc/include -DDEBUG
+
+LDFLAGS := -mz80 --no-std-crt0 crt0.rel \
+ --code-loc 0x0800 --data-loc 0x8000
+
+.PHONY: dirs dis clean
all: $(BINARY)
# build binary
-$(BINARY): $(CSOURCES)
- cp loader.asm loader.opt
- $(CC) $(CARGS) $(CSOURCES) -o $@
+$(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 $<
+ z80dasm -a -g 0h $< -o $(OSNAME).s
clean:
- - rm $(BINARY)
- - rm loader.opt
+ - rm -rd build/*
+ - rm $(OSNAME).s
+ - rm crt0.rel
diff --git a/sw/z80/serial.h b/sw/z80/serial.h
deleted file mode 100644
index 3dc9b18..0000000
--- a/sw/z80/serial.h
+++ /dev/null
@@ -1,15 +0,0 @@
-#ifndef __SERIAL_H__
-#define __SERIAL_H__
-
-#include "types.h"
-
-// define all
-#define USART_BAUD_9600
-#define USART_BAUD_115200
-
-uint8_t usart_registers[8];
-usart_registers = 0x80FF; // TODO: set real address
-
-void usart_init(int16_t baudprescale);
-
-#endif
diff --git a/sw/z80/zcc_opt.def b/sw/z80/zcc_opt.def
deleted file mode 100644
index de830a9..0000000
--- a/sw/z80/zcc_opt.def
+++ /dev/null
@@ -1,6 +0,0 @@
-
-IF !DEFINED_startup
- defc DEFINED_startup = 1
- defc startup = 1
-ENDIF
-