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If user provided IBM ROM BASIC, then INT 18h should jump to it

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Jonathan Campbell
2021-11-04 05:38:34 -07:00
parent cd33d1d666
commit 5512f97cf9
1 changed files with 11 additions and 4 deletions
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7
src/ints/bios.cpp
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@@ -6744,9 +6744,16 @@ static Bitu IRQ15_Dummy(void) {
void On_Software_CPU_Reset(); void On_Software_CPU_Reset();
static Bitu INT18_Handler(void) { static Bitu INT18_Handler(void) {
if (ibm_rom_basic_size != 0) {
/* jump to BASIC (usually F600:0000 for IBM 5150 ROM BASIC) */
SegSet16(cs, ibm_rom_basic_base >> 4);
reg_eip = 0;
}
else {
LOG_MSG("Restart by INT 18h requested\n"); LOG_MSG("Restart by INT 18h requested\n");
On_Software_CPU_Reset(); On_Software_CPU_Reset();
/* does not return */ /* does not return */
}
return CBRET_NONE; return CBRET_NONE;
} }