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Z80 NMOS Int Status Bug, Issue #620

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Add a config setting to enable code that works around the Z80 interrupt status (LD A,I) bug.

Currently enabled only for MSX platform.
This commit is contained in:
Wayne Warthen
2025-10-10 11:18:18 -07:00
parent 6684a3e039
commit f164ffdc76
28 changed files with 83 additions and 30 deletions
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Source/HBIOS/cfg_EPITX.asm
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@@ -51,6 +51,7 @@
;
PLATFORM .SET PLT_EPITX ; PLT_[SBC|ZETA|ZETA2|N8|MK4|UNA|RCZ80|RCEZ80|RCZ180|EZZ80|SCZ180|GMZ180|DYNO|RCZ280|MBC|RPH|Z80RETRO|S100|DUO|HEATH|EPITX|MON|STDZ180|NABU|SZ80]
CPUFAM .SET CPU_Z180 ; CPU FAMILY: CPU_[Z80|Z180|Z280|EZ80]
NMOSCPU .SET FALSE ; NMOS CPU (ENABLES INT STATUS BUG WORKAROUND)
BIOS .SET BIOS_WBW ; HARDWARE BIOS: BIOS_[WBW|UNA]
BATCOND .SET FALSE ; ENABLE LOW BATTERY WARNING MESSAGE
HBIOS_MUTEX .SET FALSE ; ENABLE REENTRANT CALLS TO HBIOS (ADDS OVERHEAD)