claunia/86Box
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

JVGA: Read CRTC registers from VGA rather than EGA, fixes Wolfenstein 3D.

Browse Source
This commit is contained in:
OBattler
2025-03-28 06:42:11 +01:00
parent 63222b70db
commit 47febdf196
1 changed files with 9 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
src/video/vid_jega.c
View File

@@ -29,6 +29,7 @@
#include <86box/pic.h>
#include <86box/pit.h>
#include <86box/plat.h>
#include <86box/plat_fallthrough.h>
#include <86box/mem.h>
#include <86box/rom.h>
#include <86box/device.h>
@@ -592,12 +593,18 @@ jega_in(uint16_t addr, void *priv)
break;
}
jega_log("JEGA In %04X(%02X) %02X %04X:%04X\n", addr, jega->regs_index, ret, cs >> 4, cpu_state.pc);
} else if (jega->regs[RMOD1] & 0x0C) /* Accessing to Slave EGA is redirected to Master in AX-1. */
ret = ega_in(addr, &jega->ega);
} else if (jega->regs[RMOD1] & 0x0c) {
/* Accessing to Slave EGA is redirected to Master in AX-1. */
if (jega->is_vga)
ret = vga_in(addr, &jega->vga);
else
ret = ega_in(addr, &jega->ega);
}
break;
case 0x3ba:
case 0x3da:
jega->attrff = 0;
fallthrough;
default:
/* Accessing to Slave is redirected to Master in AX-1. */
if (jega->regs[RMOD1] & 0x0c) {