diff options
Diffstat (limited to '')
| -rw-r--r-- | sw/z80_test/crt0.s | 103 | ||||
| -rw-r--r-- | sw/z80_test/makefile | 54 |
2 files changed, 157 insertions, 0 deletions
diff --git a/sw/z80_test/crt0.s b/sw/z80_test/crt0.s new file mode 100644 index 0000000..00c7da1 --- /dev/null +++ b/sw/z80_test/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 _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 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: + + .area _GSFINAL + ret + diff --git a/sw/z80_test/makefile b/sw/z80_test/makefile new file mode 100644 index 0000000..c709d61 --- /dev/null +++ b/sw/z80_test/makefile @@ -0,0 +1,54 @@ +#### +# source code settings +# +OSNAME := helvetiOS_test + +CSOURCES := $(wildcard kernel/*.c) \ + $(wildcard kernel/drivers/*.c) \ + $(wildcard libc/*.c) + +OBJECTS := $(patsubst %.c,build/%.rel,$(CSOURCES)) +HEXFILE := build/$(OSNAME).hex +BINARY := build/$(OSNAME).bin + +### +# compiler settings + +CC := sdcc + +CFLAGS := -mz80 \ + -I kernel/include \ + -I kernel/include/drivers \ + -I libc/include \ + -DDEBUG + +LDFLAGS := -mz80 --no-std-crt0 crt0.rel \ + --std-c89 -pedantic \ + --code-loc 0x0800 --data-loc 0x8000 + +.PHONY: dirs dis clean +all: $(BINARY) + +# build binary +$(BINARY): $(OBJECTS) dirs + $(CC) $(LDFLAGS) $(OBJECTS) -o $(HEXFILE) + @# xxd -r -p $(HEXFILE) $(BINARY) + makebin -s 16384 $(HEXFILE) $(BINARY) + +$(OBJECTS): build/%.rel : %.c $(CSOURCES) dirs crt0.rel + @printf "\n" + $(CC) $(CFLAGS) -c $< -o $@ + +crt0.rel: crt0.s + sdasz80 -o $< + +dirs: + mkdir -p build build/kernel build/libc + +dis: $(BINARY) + @# z80dasm -a -l -g 0h $< -o build/$(OSNAME).s + dz80 -b -n $< + +clean: + - rm -rd build/* + - rm crt0.rel |