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https://github.com/elliotnunn/NetBoot.git
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c6731715db
The floppy enables network boot in PRAM. This allows us to remove most of the ROM patches.
44 lines
1.2 KiB
Python
Executable File
44 lines
1.2 KiB
Python
Executable File
#!/usr/bin/env python3
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import sys
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import struct
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# Awful hack to run code through vasm
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def assemble(the_code):
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with open('/tmp/vasm.elliot', 'w') as f:
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f.write(the_code)
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import os
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from os import path
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assembler = path.join(path.dirname(path.abspath(__file__)), 'vasm-1/vasmm68k_std')
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os.system(f'{assembler} -quiet -Fbin -pic -o /tmp/vasm.elliot.bin /tmp/vasm.elliot')
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with open('/tmp/vasm.elliot.bin', 'rb') as f:
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return f.read()
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def write_asm(f, asm):
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f.write(assemble(f' .org {hex(f.tell())} \n rom: \n {asm}'))
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with open(sys.argv[1], 'r+b') as f:
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# I have implemented Snefru, so this is no longer needed:
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# Do the dodgy... cancel signature validation!
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# f.seek(0x21A84)
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# while f.tell() < 0x21A98:
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# f.write(b'Nq') # nop
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# Work around Mini vMac's cutesy many-drives hack (it steals out preferred drivenum of 4 from us)
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f.seek(0x1DF51) # AddMyDrive: moveq #4,d9
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f.write(b'\x10')
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f.seek(0x1DFDF) # myExtFSFilter: cmp.w #4,d0
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f.write(b'\x10')
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# Enable this to make a SysError, for rudimentaly debug output
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# for x in '218DA'.split():
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# x = eval('0x' + x)
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# f.seek(x)
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# f.write(assemble(f' move.l #{x},D0 \n .2byte 0xA9C9'))
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