aboutsummaryrefslogtreecommitdiff
path: root/source/c4emu.c
diff options
context:
space:
mode:
Diffstat (limited to 'source/c4emu.c')
-rw-r--r--source/c4emu.c106
1 files changed, 53 insertions, 53 deletions
diff --git a/source/c4emu.c b/source/c4emu.c
index 300e421..f38c897 100644
--- a/source/c4emu.c
+++ b/source/c4emu.c
@@ -44,7 +44,7 @@ static void C4ConvOAM()
uint8_t* i;
uint8_t* OAMptr = Memory.C4RAM + (Memory.C4RAM[0x626] << 2);
for (i = Memory.C4RAM + 0x1fd; i > OAMptr; i -= 4)
- *i = 0xe0; // Clear OAM-to-be
+ *i = 0xe0; /* Clear OAM-to-be */
globalX = READ_WORD(Memory.C4RAM + 0x0621);
globalY = READ_WORD(Memory.C4RAM + 0x0623);
@@ -67,7 +67,7 @@ static void C4ConvOAM()
SprX = READ_WORD(srcptr) - globalX;
SprY = READ_WORD(srcptr + 2) - globalY;
SprName = srcptr[5];
- SprAttr = srcptr[4] | srcptr[0x06]; // XXX: mask bits?
+ SprAttr = srcptr[4] | srcptr[0x06]; /* XXX: mask bits? */
sprptr = S9xGetMemPointer(READ_3WORD(srcptr + 7));
if (*sprptr != 0)
{
@@ -76,7 +76,7 @@ static void C4ConvOAM()
for (SprCnt = *sprptr++; SprCnt > 0 && SprCount > 0; SprCnt--, sprptr += 4)
{
X = (int8_t)sprptr[1];
- if (SprAttr & 0x40) // flip X
+ if (SprAttr & 0x40) /* flip X */
X = -X - ((sprptr[0] & 0x20) ? 16 : 8);
X += SprX;
if (X >= -16 && X <= 272)
@@ -90,7 +90,7 @@ static void C4ConvOAM()
OAMptr[0] = X & 0xff;
OAMptr[1] = (uint8_t)Y;
OAMptr[2] = SprName + sprptr[3];
- OAMptr[3] = SprAttr ^ (sprptr[0] & 0xc0); // XXX: Carry from SprName addition?
+ OAMptr[3] = SprAttr ^ (sprptr[0] & 0xc0); /* XXX: Carry from SprName addition? */
*OAMptr2 &= ~(3 << offset);
if (X & 0x100)
*OAMptr2 |= 1 << offset;
@@ -140,7 +140,7 @@ static void C4DoScaleRotate(int32_t row_padding)
int32_t x, y;
uint8_t bit = 0x80;
- // Calculate matrix
+ /* Calculate matrix */
int32_t XScale = READ_WORD(Memory.C4RAM + 0x1f8f);
if (XScale & 0x8000)
XScale = 0x7fff;
@@ -150,33 +150,33 @@ static void C4DoScaleRotate(int32_t row_padding)
if (READ_WORD(Memory.C4RAM + 0x1f80) == 0)
{
- // no rotation
- // XXX: only do this for C and D?
- // XXX: and then only when YScale is 0x1000?
+ /* no rotation
+ * XXX: only do this for C and D?
+ * XXX: and then only when YScale is 0x1000? */
A = (int16_t)XScale;
B = 0;
C = 0;
D = (int16_t)YScale;
}
- else if (READ_WORD(Memory.C4RAM + 0x1f80) == 128) // 90 degree rotation
+ else if (READ_WORD(Memory.C4RAM + 0x1f80) == 128) /* 90 degree rotation */
{
- // XXX: Really do this?
+ /* XXX: Really do this? */
A = 0;
B = (int16_t)(-YScale);
C = (int16_t)XScale;
D = 0;
}
- else if (READ_WORD(Memory.C4RAM + 0x1f80) == 256) // 180 degree rotation
+ else if (READ_WORD(Memory.C4RAM + 0x1f80) == 256) /* 180 degree rotation */
{
- // XXX: Really do this?
+ /* XXX: Really do this? */
A = (int16_t)(-XScale);
B = 0;
C = 0;
D = (int16_t)(-YScale);
}
- else if (READ_WORD(Memory.C4RAM + 0x1f80) == 384) // 270 degree rotation
+ else if (READ_WORD(Memory.C4RAM + 0x1f80) == 384) /* 270 degree rotation */
{
- // XXX: Really do this?
+ /* XXX: Really do this? */
A = 0;
B = (int16_t)YScale;
C = (int16_t)(-XScale);
@@ -190,24 +190,24 @@ static void C4DoScaleRotate(int32_t row_padding)
D = (int16_t) SAR16(C4CosTable[READ_WORD(Memory.C4RAM + 0x1f80) & 0x1ff] * YScale, 15);
}
- // Calculate Pixel Resolution
+ /* Calculate Pixel Resolution */
w = Memory.C4RAM[0x1f89] & ~7;
h = Memory.C4RAM[0x1f8c] & ~7;
- // Clear the output RAM
+ /* Clear the output RAM */
memset(Memory.C4RAM, 0, (w + row_padding / 4)*h / 2);
Cx = (int16_t)READ_WORD(Memory.C4RAM + 0x1f83);
Cy = (int16_t)READ_WORD(Memory.C4RAM + 0x1f86);
- // Calculate start position (i.e. (Ox, Oy) = (0, 0))
- // The low 12 bits are fractional, so (Cx<<12) gives us the Cx we want in
- // the function. We do Cx*A etc normally because the matrix parameters
- // already have the fractional parts.
+ /* Calculate start position (i.e. (Ox, Oy) = (0, 0))
+ * The low 12 bits are fractional, so (Cx<<12) gives us the Cx we want in
+ * the function. We do Cx*A etc normally because the matrix parameters
+ * already have the fractional parts. */
LineX = (Cx << 12) - Cx * A - Cx * B;
LineY = (Cy << 12) - Cy * C - Cy * D;
- // Start loop
+ /* Start loop */
for (y = 0; y < h; y++)
{
X = LineX;
@@ -224,7 +224,7 @@ static void C4DoScaleRotate(int32_t row_padding)
byte >>= 4;
}
- // De-bitplanify
+ /* De-bitplanify */
if (byte & 1)
Memory.C4RAM[outidx] |= bit;
if (byte & 2)
@@ -241,7 +241,7 @@ static void C4DoScaleRotate(int32_t row_padding)
outidx += 32;
}
- X += A; // Add 1 to output x => add an A and a C
+ X += A; /* Add 1 to output x => add an A and a C */
Y += C;
}
outidx += 2 + row_padding;
@@ -249,7 +249,7 @@ static void C4DoScaleRotate(int32_t row_padding)
outidx &= ~0x10;
else
outidx -= w * 4 + row_padding;
- LineX += B; // Add 1 to output y => add a B and a D
+ LineX += B; /* Add 1 to output y => add a B and a D */
LineY += D;
}
}
@@ -258,7 +258,7 @@ static void C4DrawLine(int32_t X1, int32_t Y1, int16_t Z1, int32_t X2, int32_t Y
{
int32_t i;
- // Transform coordinates
+ /* Transform coordinates */
C4WFXVal = (int16_t)X1;
C4WFYVal = (int16_t)Y1;
C4WFZVal = Z1;
@@ -277,7 +277,7 @@ static void C4DrawLine(int32_t X1, int32_t Y1, int16_t Z1, int32_t X2, int32_t Y
X2 = (C4WFXVal + 48) << 8;
Y2 = (C4WFYVal + 48) << 8;
- // get line info
+ /* get line info */
C4WFXVal = (int16_t)(X1 >> 8);
C4WFYVal = (int16_t)(Y1 >> 8);
C4WFX2Val = (int16_t)(X2 >> 8);
@@ -286,10 +286,10 @@ static void C4DrawLine(int32_t X1, int32_t Y1, int16_t Z1, int32_t X2, int32_t Y
X2 = (int16_t)C4WFXVal;
Y2 = (int16_t)C4WFYVal;
- // render line
+ /* render line */
for (i = C4WFDist ? C4WFDist : 1; i > 0; i--)
{
- //.loop
+ /*.loop */
if (X1 > 0xff && Y1 > 0xff && X1 < 0x6000 && Y1 < 0x6000)
{
uint16_t addr = (((Y1 >> 8) >> 3) << 8) - (((Y1 >> 8) >> 3) << 6) + (((X1 >> 8) >> 3) << 4) + ((Y1 >> 8) & 7) * 2;
@@ -348,7 +348,7 @@ static void C4TransformLines()
C4WFDist = Memory.C4RAM[0x1f89];
C4WFScale = Memory.C4RAM[0x1f8c];
- // transform vertices
+ /* transform vertices */
ptr = Memory.C4RAM;
for (i = READ_WORD(Memory.C4RAM + 0x1f80); i > 0; i--, ptr += 0x10)
@@ -358,7 +358,7 @@ static void C4TransformLines()
C4WFZVal = READ_WORD(ptr + 9);
C4TransfWireFrame();
- // displace
+ /* displace */
WRITE_WORD(ptr + 1, C4WFXVal + 0x80);
WRITE_WORD(ptr + 5, C4WFYVal + 0x50);
}
@@ -491,25 +491,25 @@ static void S9xC4ProcessSprites()
{
switch (Memory.C4RAM[0x1f4d])
{
- case 0x00: // Build OAM
+ case 0x00: /* Build OAM */
C4ConvOAM();
break;
- case 0x03: // Scale/Rotate
+ case 0x03: /* Scale/Rotate */
C4DoScaleRotate(0);
break;
- case 0x05: // Transform Lines
+ case 0x05: /* Transform Lines */
C4TransformLines();
break;
- case 0x07: // Scale/Rotate
+ case 0x07: /* Scale/Rotate */
C4DoScaleRotate(64);
break;
- case 0x08: // Draw wireframe
+ case 0x08: /* Draw wireframe */
C4DrawWireFrame();
break;
- case 0x0b: // Disintegrate
+ case 0x0b: /* Disintegrate */
C4SprDisintegrate();
break;
- case 0x0c: // Wave
+ case 0x0c: /* Wave */
C4BitPlaneWave();
break;
default:
@@ -529,14 +529,14 @@ void S9xSetC4(uint8_t byte, uint16_t Address)
{
switch (byte)
{
- case 0x00: // Sprite
+ case 0x00: /* Sprite */
S9xC4ProcessSprites();
break;
- case 0x01: // Draw wireframe
+ case 0x01: /* Draw wireframe */
memset(Memory.C4RAM + 0x300, 0, 16 * 12 * 3 * 4);
C4DrawWireFrame();
break;
- case 0x05: // Propulsion (?)
+ case 0x05: /* Propulsion (?) */
{
int32_t tmp = 0x10000;
if (READ_WORD(Memory.C4RAM + 0x1f83))
@@ -544,7 +544,7 @@ void S9xSetC4(uint8_t byte, uint16_t Address)
WRITE_WORD(Memory.C4RAM + 0x1f80, (uint16_t)tmp);
break;
}
- case 0x0d: // Set vector length
+ case 0x0d: /* Set vector length */
C41FXVal = READ_WORD(Memory.C4RAM + 0x1f80);
C41FYVal = READ_WORD(Memory.C4RAM + 0x1f83);
C41FDistVal = READ_WORD(Memory.C4RAM + 0x1f86);
@@ -554,7 +554,7 @@ void S9xSetC4(uint8_t byte, uint16_t Address)
WRITE_WORD(Memory.C4RAM + 0x1f89, C41FXVal);
WRITE_WORD(Memory.C4RAM + 0x1f8c, C41FYVal);
break;
- case 0x10: // Polar to rectangluar
+ case 0x10: /* Polar to rectangular */
{
int32_t tmp = SAR32((int32_t)READ_WORD(Memory.C4RAM + 0x1f83) * C4CosTable[READ_WORD(Memory.C4RAM + 0x1f80) & 0x1ff] * 2, 16);
WRITE_3WORD(Memory.C4RAM + 0x1f86, tmp);
@@ -562,7 +562,7 @@ void S9xSetC4(uint8_t byte, uint16_t Address)
WRITE_3WORD(Memory.C4RAM + 0x1f89, (tmp - SAR32(tmp, 6)));
break;
}
- case 0x13: // Polar to rectangluar
+ case 0x13: /* Polar to rectangular */
{
int32_t tmp = SAR32((int32_t)READ_WORD(Memory.C4RAM + 0x1f83) * C4CosTable[READ_WORD(Memory.C4RAM + 0x1f80) & 0x1ff] * 2, 8);
WRITE_3WORD(Memory.C4RAM + 0x1f86, tmp);
@@ -570,13 +570,13 @@ void S9xSetC4(uint8_t byte, uint16_t Address)
WRITE_3WORD(Memory.C4RAM + 0x1f89, tmp);
break;
}
- case 0x15: // Pythagorean
+ case 0x15: /* Pythagorean */
C41FXVal = READ_WORD(Memory.C4RAM + 0x1f80);
C41FYVal = READ_WORD(Memory.C4RAM + 0x1f83);
C41FDist = (int16_t)_isqrt((int32_t) C41FXVal * C41FXVal + (int32_t) C41FYVal * C41FYVal);
WRITE_WORD(Memory.C4RAM + 0x1f80, C41FDist);
break;
- case 0x1f: // atan
+ case 0x1f: /* atan */
C41FXVal = READ_WORD(Memory.C4RAM + 0x1f80);
C41FYVal = READ_WORD(Memory.C4RAM + 0x1f83);
if (C41FXVal == 0)
@@ -595,7 +595,7 @@ void S9xSetC4(uint8_t byte, uint16_t Address)
}
WRITE_WORD(Memory.C4RAM + 0x1f86, C41FAngleRes);
break;
- case 0x22: // Trapezoid
+ case 0x22: /* Trapezoid */
{
int16_t angle1 = READ_WORD(Memory.C4RAM + 0x1f8c) & 0x1ff;
int16_t angle2 = READ_WORD(Memory.C4RAM + 0x1f8f) & 0x1ff;
@@ -641,7 +641,7 @@ void S9xSetC4(uint8_t byte, uint16_t Address)
}
break;
}
- case 0x25: // Multiply
+ case 0x25: /* Multiply */
{
int32_t foo = READ_3WORD(Memory.C4RAM + 0x1f80);
int32_t bar = READ_3WORD(Memory.C4RAM + 0x1f83);
@@ -649,7 +649,7 @@ void S9xSetC4(uint8_t byte, uint16_t Address)
WRITE_3WORD(Memory.C4RAM + 0x1f80, foo);
break;
}
- case 0x2d: // Transform Coords
+ case 0x2d: /* Transform Coords */
C4WFXVal = READ_WORD(Memory.C4RAM + 0x1f81);
C4WFYVal = READ_WORD(Memory.C4RAM + 0x1f84);
C4WFZVal = READ_WORD(Memory.C4RAM + 0x1f87);
@@ -661,7 +661,7 @@ void S9xSetC4(uint8_t byte, uint16_t Address)
WRITE_WORD(Memory.C4RAM + 0x1f80, C4WFXVal);
WRITE_WORD(Memory.C4RAM + 0x1f83, C4WFYVal);
break;
- case 0x40: // Sum
+ case 0x40: /* Sum */
{
int32_t i;
uint16_t sum = 0;
@@ -669,7 +669,7 @@ void S9xSetC4(uint8_t byte, uint16_t Address)
WRITE_WORD(Memory.C4RAM + 0x1f80, sum);
break;
}
- case 0x54: // Square
+ case 0x54: /* Square */
{
int64_t a = SAR64((int64_t)READ_3WORD(Memory.C4RAM + 0x1f80) << 40, 40);
a *= a;
@@ -677,11 +677,11 @@ void S9xSetC4(uint8_t byte, uint16_t Address)
WRITE_3WORD(Memory.C4RAM + 0x1f86, (a >> 24));
break;
}
- case 0x5c: // Immediate Reg
+ case 0x5c: /* Immediate Reg */
for (i = 0; i < 12 * 4; i++)
Memory.C4RAM [i] = C4TestPattern [i];
break;
- case 0x89: // Immediate ROM
+ case 0x89: /* Immediate ROM */
Memory.C4RAM [0x1f80] = 0x36;
Memory.C4RAM [0x1f81] = 0x43;
Memory.C4RAM [0x1f82] = 0x05;
@@ -692,7 +692,7 @@ void S9xSetC4(uint8_t byte, uint16_t Address)
}
}
else if (Address == 0x7f47)
- // memmove required: Can overlap arbitrarily [Neb]
+ /* memmove required: Can overlap arbitrarily [Neb] */
memmove(Memory.C4RAM + (READ_WORD(Memory.C4RAM + 0x1f45) & 0x1fff), S9xGetMemPointer(READ_3WORD(Memory.C4RAM + 0x1f40)), READ_WORD(Memory.C4RAM + 0x1f43));
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-02 01:42:55 +0000