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implement 8bit writes to DISPCNT/BGCNT/BGPOS 

fixes #98
This commit is contained in:
StapleButter 2017-07-23 01:39:21 +02:00
parent 0df3a29374
commit f869975a51
1 changed files with 35 additions and 6 deletions
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41
src/GPU2D.cpp
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@ -74,6 +74,8 @@
// mosaic: // mosaic:
// * mosaic grid starts at 0,0 regardless of the BG/sprite position // * mosaic grid starts at 0,0 regardless of the BG/sprite position
// TODO: find which parts of DISPCNT are latched. for example, not possible to change video mode midframe.
GPU2D::GPU2D(u32 num) GPU2D::GPU2D(u32 num)
{ {
@ -190,6 +192,37 @@ void GPU2D::Write8(u32 addr, u8 val)
{ {
switch (addr & 0x00000FFF) switch (addr & 0x00000FFF)
{ {
case 0x000: DispCnt = (DispCnt & 0xFFFFFF00) | val; return;
case 0x001: DispCnt = (DispCnt & 0xFFFF00FF) | (val << 8); return;
case 0x002: DispCnt = (DispCnt & 0xFF00FFFF) | (val << 16); return;
case 0x003: DispCnt = (DispCnt & 0x00FFFFFF) | (val << 24); return;
case 0x008: BGCnt[0] = (BGCnt[0] & 0xFF00) | val; return;
case 0x009: BGCnt[0] = (BGCnt[0] & 0x00FF) | (val << 8); return;
case 0x00A: BGCnt[1] = (BGCnt[1] & 0xFF00) | val; return;
case 0x00B: BGCnt[1] = (BGCnt[1] & 0x00FF) | (val << 8); return;
case 0x00C: BGCnt[2] = (BGCnt[2] & 0xFF00) | val; return;
case 0x00D: BGCnt[2] = (BGCnt[2] & 0x00FF) | (val << 8); return;
case 0x00E: BGCnt[3] = (BGCnt[3] & 0xFF00) | val; return;
case 0x00F: BGCnt[3] = (BGCnt[3] & 0x00FF) | (val << 8); return;
case 0x010: BGXPos[0] = (BGXPos[0] & 0xFF00) | val; return;
case 0x011: BGXPos[0] = (BGXPos[0] & 0x00FF) | (val << 8); return;
case 0x012: BGYPos[0] = (BGYPos[0] & 0xFF00) | val; return;
case 0x013: BGYPos[0] = (BGYPos[0] & 0x00FF) | (val << 8); return;
case 0x014: BGXPos[1] = (BGXPos[1] & 0xFF00) | val; return;
case 0x015: BGXPos[1] = (BGXPos[1] & 0x00FF) | (val << 8); return;
case 0x016: BGYPos[1] = (BGYPos[1] & 0xFF00) | val; return;
case 0x017: BGYPos[1] = (BGYPos[1] & 0x00FF) | (val << 8); return;
case 0x018: BGXPos[2] = (BGXPos[2] & 0xFF00) | val; return;
case 0x019: BGXPos[2] = (BGXPos[2] & 0x00FF) | (val << 8); return;
case 0x01A: BGYPos[2] = (BGYPos[2] & 0xFF00) | val; return;
case 0x01B: BGYPos[2] = (BGYPos[2] & 0x00FF) | (val << 8); return;
case 0x01C: BGXPos[3] = (BGXPos[3] & 0xFF00) | val; return;
case 0x01D: BGXPos[3] = (BGXPos[3] & 0x00FF) | (val << 8); return;
case 0x01E: BGYPos[3] = (BGYPos[3] & 0xFF00) | val; return;
case 0x01F: BGYPos[3] = (BGYPos[3] & 0x00FF) | (val << 8); return;
case 0x040: Win0Coords[1] = val; return; case 0x040: Win0Coords[1] = val; return;
case 0x041: Win0Coords[0] = val; return; case 0x041: Win0Coords[0] = val; return;
case 0x042: Win1Coords[1] = val; return; case 0x042: Win1Coords[1] = val; return;
@ -230,12 +263,8 @@ void GPU2D::Write16(u32 addr, u16 val)
{ {
switch (addr & 0x00000FFF) switch (addr & 0x00000FFF)
{ {
case 0x000: case 0x000: DispCnt = (DispCnt & 0xFFFF0000) | val; return;
DispCnt = (DispCnt & 0xFFFF0000) | val; case 0x002: DispCnt = (DispCnt & 0x0000FFFF) | (val << 16); return;
return;
case 0x002:
DispCnt = (DispCnt & 0x0000FFFF) | (val << 16);
return;
case 0x008: BGCnt[0] = val; return; case 0x008: BGCnt[0] = val; return;
case 0x00A: BGCnt[1] = val; return; case 0x00A: BGCnt[1] = val; return;