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(MESS) snes.c: fixed Dezaemon SRAM mappings. [Fabio Priuli]

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This commit is contained in:
Fabio Priuli 2012-10-09 19:30:26 +00:00
parent 34d96fe7ed
commit 4803200d6a
1 changed files with 16 additions and 2 deletions
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18
src/mame/machine/snes.c
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@ -1044,7 +1044,14 @@ READ8_HANDLER( snes_r_bank5 )
}
else if ((state->m_cart[0].mode & 5) && (address < 0x8000)) /* Mode 20 & 22 */
{
if (state->m_cart[0].sram > 0)
if (state->m_cart[0].sram > 0x8000)
{
// In this case, SRAM is mapped in 0x8000 chunks at diff offsets: 0x700000-0x707fff, 0x710000-0x717fff, etc.
int mask = (state->m_cart[0].sram << 1) - 1;
mask &= ~0x8000;
value = snes_ram[0x700000 + (offset & mask)];
}
else if (state->m_cart[0].sram > 0)
{
int mask = state->m_cart[0].sram - 1; /* Limit SRAM size to what's actually present */
value = snes_ram[0x700000 + (offset & mask)];
@ -1320,7 +1327,14 @@ WRITE8_HANDLER( snes_w_bank5 )
snes_ram[0xf00000 + offset] = data;
else if ((state->m_cart[0].mode & 5) && (address < 0x8000)) /* Mode 20 & 22 */
{
if (state->m_cart[0].sram > 0)
if (state->m_cart[0].sram > 0x8000)
{
// In this case, SRAM is mapped in 0x8000 chunks at diff offsets: 0x700000-0x707fff, 0x710000-0x717fff, etc.
int mask = (state->m_cart[0].sram << 1) - 1;
mask &= ~0x8000;
snes_ram[0x700000 + (offset & mask)] = data;
}
else if (state->m_cart[0].sram > 0)
{
int mask = state->m_cart[0].sram - 1; /* Limit SRAM size to what's actually present */
snes_ram[0x700000 + (offset & mask)] = data;