mirror/86Box
1
0
Fork 0
mirror of https://github.com/86Box/86Box.git synced 2026-02-28 01:44:22 -07:00
Code Issues Packages Projects Releases Activity

CS423x: Always enable OPL3 on CS4232/4236 during context switch as they lack X registers

Browse Source
This commit is contained in:
win2kgamer
2025-10-21 20:38:21 -05:00
parent 71fe92daed
commit 755e25285b
1 changed files with 5 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
src/sound/snd_cs423x.c
View File

@@ -568,7 +568,11 @@ cs423x_ctxswitch_write(uint16_t addr, UNUSED(uint8_t val), void *priv)
{
cs423x_t *dev = (cs423x_t *) priv;
uint8_t ctx = (dev->regs[7] & 0x80);
uint8_t enable_opl = (dev->ad1848.xregs[4] & 0x10) && !(dev->indirect_regs[2] & 0x85);
uint8_t enable_opl = (dev->ad1848.xregs[4] & 0x10) && !(dev->indirect_regs[2] & 0x85); /* CS4236B+ */
/* CS4232/4236 (non-B) doesn't have an IFM bit, always enable the OPL on these chips */
if (dev->type <= CRYSTAL_CS4236)
enable_opl = 1;
/* Check if a context switch (WSS=1 <-> SBPro=0) occurred through the address being written. */
if ((dev->regs[7] & 0x80) ? ((addr & 0xfff0) == dev->sb_base) : ((addr & 0xfffc) == dev->wss_base)) {