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cheapocabra: revised mirroring in Software ID mode

This commit is contained in:
rainwarrior 2016-09-05 21:03:11 +00:00
parent 4edd578c27
commit 90044bba62
1 changed files with 11 additions and 3 deletions
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14
trunk/src/boards/cheapocabra.cpp
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@ -86,9 +86,17 @@ static DECLFW(M111Write) {
static DECLFR(M111FlashID)
{
uint32 a0 = A & 1;
if (a0 == 0) return 0xBF;
else return 0xB7;
// Software ID mode is undefined by the datasheet for all but the lowest 2 addressable bytes,
// but some tests of the chip currently being used found it repeats in 512-byte patterns.
// http://forums.nesdev.com/viewtopic.php?p=178728#p178728
uint32 aid = A & 0x1FF;
switch (aid)
{
case 0: return 0xBF;
case 1: return 0xB7;
default: return 0xFF;
}
}
void M111FlashIDEnter()