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Correct code present mask when using 16-bit addressing. Fixes graphics issues on Windows 9x with VGA 16-colour driver.

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This commit is contained in:
SarahW 2019-04-10 22:05:26 +01:00
commit c0a7fcb343
1 changed files with 2 additions and 2 deletions
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4
src/codegen.c
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@ -121,7 +121,7 @@ void codegen_check_seg_write(codeblock_t *block, ir_data_t *ir, x86seg *seg)
static x86seg *codegen_generate_ea_16_long(ir_data_t *ir, x86seg *op_ea_seg, uint32_t fetchdat, int op_ssegs, uint32_t *op_pc)
{
uint32_t old_pc = *op_pc;
uint32_t old_pc = (*op_pc) + 1;
// pclog("codegen - mod=%i rm=%i reg=%i fetchdat=%08x\n", cpu_mod, cpu_rm, cpu_reg, fetchdat);
if (!cpu_mod && cpu_rm == 6)
{
@ -182,7 +182,7 @@ static x86seg *codegen_generate_ea_16_long(ir_data_t *ir, x86seg *op_ea_seg, uin
}
}
codegen_mark_code_present(ir->block, cs+old_pc, (*op_pc)-old_pc);
codegen_mark_code_present(ir->block, cs+old_pc, ((*op_pc)+1)-old_pc);
return op_ea_seg;
}