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UpdatePaging(): Clear memdirty flag for $Cx pages (#495)

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. STA $CFFF will set memdirty[0xCF] flag
. The loop at the end of UpdatePaging() would copy a page of zeros over pCxRomInternal[0xF00] (ie. $CF00-CFFF)
This commit is contained in:
tomcw 2017-10-17 14:46:55 -07:00
parent ba6a38d325
commit 1cb5c6868d
1 changed files with 2 additions and 0 deletions
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2
source/Memory.cpp
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@ -913,6 +913,7 @@ static void UpdatePaging(BOOL initialize)
for (loop = 0xC0; loop < 0xC8; loop++)
{
memdirty[loop] = 0; // ROM can't be dirty
const UINT uSlotOffset = (loop & 0x0f) * 0x100;
if (loop == 0xC3)
memshadow[loop] = (SW_SLOTC3ROM && SW_SLOTCXROM) ? pCxRomPeripheral+uSlotOffset // C300..C3FF - Slot 3 ROM (all 0x00's)
@ -924,6 +925,7 @@ static void UpdatePaging(BOOL initialize)
for (loop = 0xC8; loop < 0xD0; loop++)
{
memdirty[loop] = 0; // ROM can't be dirty (but STA $CFFF will set the dirty flag)
const UINT uRomOffset = (loop & 0x0f) * 0x100;
memshadow[loop] = (SW_SLOTCXROM && !INTC8ROM) ? pCxRomPeripheral+uRomOffset // C800..CFFF - Peripheral ROM (GH#486)
: pCxRomInternal+uRomOffset; // C800..CFFF - Internal ROM