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authorJoão Silva2017-06-18 15:44:33 +0100
committerJoão Silva2017-06-18 15:44:33 +0100
commitd66c2f9506c54aa845e77dc2194f6b3dc3915a00 (patch)
treef9c2247bf5715bef610fe56dc3763144aa5c488a /source
parentab0615abb6fc77e6acdf34ff90d0de9a95b8e2f2 (diff)
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Copied VLDC9 fix from snes9x_3ds.
Diffstat (limited to 'source')
-rw-r--r--source/sa1.c31
1 files changed, 16 insertions, 15 deletions
diff --git a/source/sa1.c b/source/sa1.c
index 54ed836..b19ba11 100644
--- a/source/sa1.c
+++ b/source/sa1.c
@@ -6,8 +6,8 @@
#include "sa1.h"
-static void S9xSA1CharConv2();
-static void S9xSA1DMA();
+static void S9xSA1CharConv2(void);
+static void S9xSA1DMA(void);
static void S9xSA1ReadVariableLengthData(bool inc, bool no_shift);
void S9xSA1Init()
@@ -196,8 +196,6 @@ void S9xSA1SetByte(uint8_t byte, uint32_t address)
*ptr &= ~(15 << ((address & 1) << 2));
*ptr |= (byte & 15) << ((address & 1) << 2);
}
- default:
- return;
}
}
@@ -252,20 +250,25 @@ void S9xSetSA1MemMap(uint32_t which1, uint8_t map)
int32_t i;
int32_t start = which1 * 0x100 + 0xc00;
int32_t start2 = which1 * 0x200;
+ uint8_t* block;
if (which1 >= 2)
start2 += 0x400;
for (c = 0; c < 0x100; c += 16)
{
- uint8_t* block = &Memory.ROM [(map & 7) * 0x100000 + (c << 12)];
+ block = &Memory.ROM [(map & 7) * 0x100000 + (c << 12)];
for (i = c; i < c + 16; i++)
Memory.Map [start + i] = SA1.Map [start + i] = block;
}
for (c = 0; c < 0x200; c += 16)
{
- uint8_t* block = &Memory.ROM [(map & 7) * 0x100000 + (c << 11) - 0x8000];
+ /*Code from Snes9x 1.54.1 - *
+ * This allows Super Mario World VLDC 9 hack to load *
+ * conversion to int is needed here - map is promoted but which1 is not */
+ int32_t offset = (((map & 0x80) ? map : which1) & 7) * 0x100000 + (c << 11) - 0x8000;
+ block = &Memory.ROM [offset];
for (i = c + 8; i < c + 16; i++)
Memory.Map [start2 + i] = SA1.Map [start2 + i] = block;
}
@@ -292,13 +295,13 @@ uint8_t S9xGetSA1(uint32_t address)
case 0x230a:
return ((uint8_t)(SA1.sum >> 32));
case 0x230d:
- {
- uint8_t byte = Memory.FillRAM [0x230d];
+ {
+ uint8_t byte = Memory.FillRAM [0x230d];
- if (Memory.FillRAM [0x2258] & 0x80)
- S9xSA1ReadVariableLengthData(true, false);
- return (byte);
- }
+ if (Memory.FillRAM [0x2258] & 0x80)
+ S9xSA1ReadVariableLengthData(true, false);
+ return (byte);
+ }
}
return (Memory.FillRAM [address]);
@@ -418,9 +421,7 @@ void S9xSetSA1(uint8_t byte, uint32_t address)
case 0x2236:
Memory.FillRAM [address] = byte;
if ((Memory.FillRAM [0x2230] & 0xa4) == 0x80)
- {
S9xSA1DMA(); // Normal DMA to I-RAM
- }
else if ((Memory.FillRAM [0x2230] & 0xb0) == 0xb0)
{
Memory.FillRAM [0x2300] |= 0x20;
@@ -500,7 +501,7 @@ void S9xSetSA1(uint8_t byte, uint32_t address)
S9xSA1ReadVariableLengthData(false, true);
return;
}
-
+
Memory.FillRAM [address] = byte;
}