Vastly improve the ALi M1409 emulation (all of shadow RAM now work, as does bus speed and external cache setting), and fix the "Writing unimplemented Cyrix register FF" error as well.

2025-05-29 09:45:49 +02:00
parent 0e972400b4
commit 25f0a26ea1
2 changed files with 210 additions and 64 deletions
--- a/src/cpu/cpu.c
+++ b/src/cpu/cpu.c
@@ -4264,7 +4264,7 @@ cpu_write(uint16_t addr, uint8_t val, UNUSED(void *priv))
        cyrix_addr = val;
    else if (addr < 0xf1)  switch (cyrix_addr) {
        default:
-            if (cyrix_addr >= 0xc0)
+            if ((cyrix_addr >= 0xc0) && (cyrix_addr != 0xff))
                fatal("Writing unimplemented Cyrix register %02X\n", cyrix_addr);
            break;