add test ROM for simulation, removing some costly delays

This commit is contained in:
Romain Dolbeau 2025-10-05 16:28:44 +02:00
parent 7dde915779
commit ea26e3afc3
4 changed files with 51 additions and 0 deletions

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RETRO68=/home/dolbeau/Retro68/build/toolchain
AS=${RETRO68}/bin/m68k-apple-macos-as
CC=${RETRO68}/bin/m68k-apple-macos-gcc
LD=${RETRO68}/bin/m68k-apple-macos-ld
STRIP=${RETRO68}/bin/m68k-apple-macos-strip
OBJCOPY=${RETRO68}/bin/m68k-apple-macos-objcopy
NM=${RETRO68}/bin/m68k-apple-macos-nm
HOSTCC=gcc
HOSTCFLAGS=-O2
ARCHFLAGS=-march=68020 -mcpu=68020
CFLAGS=-O2 -mpcrel
GENLINK=../patcher/genlink
PATCHER=../patcher/patcher
all: sun3_60_v1.9.bin
show: rompatch.elf
$(NM) $< | sort
sun3_60_v1.9.bin: ../ rompatch.raw input.txt
/bin/cp ../Sun3_60NoParity/sun3_60_v1.9.bin sun3_60_v1.9.bin
${PATCHER} -i rompatch.raw -p sun3_60_v1.9.bin -d input.txt
linker.ld: input.txt rompatch.s
${GENLINK} -d $< >| $@
echo $(shell for X in `grep .section rompatch.s | awk '{ print $$2 }' `; do grep -q $$X linker.ld || echo " $$X has no entry in linker.ld" && /bin/false; done)
rompatch.o: rompatch.s
${AS} ${ARCHFLAGS} $< -o $@ -a > rompatch.l
rompatch.elf: linker.ld rompatch.o ${CSRC:.c=.o} # linker script must be first
${LD} -o $@ -T $^
rompatch.raw: rompatch.elf
${OBJCOPY} $^ $@ --input-target=elf32-m68k --output-target=binary
clean:
rm -f res.inc ${CSRC_ASM} *.o rompatch.srec rompatch.raw rompatch.dir rompatch.l linker.ld rompatch.elf

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Patches to the V1.9 ROM of the Sun3/60, that cuts down on some waoting time to speed-up simulation. Based on the NoParity version, so simulation don't need to implement all of the parity stuff, either.

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0x01e4e, 2, loweritercount
0x02d5c, 2, loweritercount2

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.section .text.loweritercount
loweritercount:
.short 2
.section .text.loweritercount2
loweritercount2:
.short 2