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Add IBM signature in EGA video BIOS for compatibility. Fixes EGA detection in 221 B Baker Street. Also include trailing space in signature in case it is checked with word values.

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@4204
This commit is contained in:
ripsaw8080 2019-04-08 21:13:00 +00:00
parent c03a6f497c
commit 8688dc9702
1 changed files with 4 additions and 6 deletions
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10
src/ints/int10_memory.cpp
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@ -133,12 +133,10 @@ void INT10_SetupRomMemory(void) {
// set up the start of the ROM
phys_writew(rom_base+0,0xaa55);
phys_writeb(rom_base+2,0x40); // Size of ROM: 64 512-blocks = 32KB
if (IS_VGA_ARCH) {
phys_writeb(rom_base+0x1e,0x49); // IBM string
phys_writeb(rom_base+0x1f,0x42);
phys_writeb(rom_base+0x20,0x4d);
phys_writeb(rom_base+0x21,0x00);
}
phys_writeb(rom_base+0x1e,0x49); // IBM string
phys_writeb(rom_base+0x1f,0x42);
phys_writeb(rom_base+0x20,0x4d);
phys_writeb(rom_base+0x21,0x20);
int10.rom.used=0x100;
}