Apple-2-Tools/AppleWin
1
0
Fork 0
mirror of https://github.com/AppleWin/AppleWin.git synced 2025-08-15 02:27:45 +00:00
Code Issues Projects Releases Wiki Activity

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

Browse Source 
. 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
Download Patch File Download Diff File Expand all files Collapse all files

2
source/Memory.cpp
View File

@@ -913,6 +913,7 @@ static void UpdatePaging(BOOL initialize)
for (loop = 0xC0; loop < 0xC8; loop++) for (loop = 0xC0; loop < 0xC8; loop++)
{ {
memdirty[loop] = 0; // ROM can't be dirty
const UINT uSlotOffset = (loop & 0x0f) * 0x100; const UINT uSlotOffset = (loop & 0x0f) * 0x100;
if (loop == 0xC3) if (loop == 0xC3)
memshadow[loop] = (SW_SLOTC3ROM && SW_SLOTCXROM) ? pCxRomPeripheral+uSlotOffset // C300..C3FF - Slot 3 ROM (all 0x00's) 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++) 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; const UINT uRomOffset = (loop & 0x0f) * 0x100;
memshadow[loop] = (SW_SLOTCXROM && !INTC8ROM) ? pCxRomPeripheral+uRomOffset // C800..CFFF - Peripheral ROM (GH#486) memshadow[loop] = (SW_SLOTCXROM && !INTC8ROM) ? pCxRomPeripheral+uRomOffset // C800..CFFF - Peripheral ROM (GH#486)
: pCxRomInternal+uRomOffset; // C800..CFFF - Internal ROM : pCxRomInternal+uRomOffset; // C800..CFFF - Internal ROM