RaySollium99/picodrive
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scroll size improvement

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This commit is contained in:
notaz 2017-09-27 02:59:50 +03:00
parent b71cbbf705
commit eced019098
2 changed files with 8 additions and 3 deletions
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7
pico/draw.c
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@ -394,8 +394,11 @@ static void DrawLayer(int plane_sh, int *hcache, int cellskip, int maxcells,
ts.xmask=(1<<shift[width])-1; // X Mask in tiles (0x1f-0x7f)
ymask=(height<<8)|0xff; // Y Mask in pixels
if(width == 1) ymask&=0x1ff;
else if(width>1) ymask =0x0ff;
switch (width) {
case 1: ymask &= 0x1ff; break;
case 2: ymask = 0x007; break;
case 3: ymask = 0x0ff; break;
}
// Find name table:
if (plane_sh&1) ts.nametab=(pvid->reg[4]&0x07)<<12; // B

4
pico/draw_arm.S
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@ -303,7 +303,9 @@ DrawLayer:
cmp r10, #1
biclt r1, r1, #0xfc00
biceq r1, r1, #0xfe00
bicgt r1, r1, #0xff00 @ r1=ymask=(height<<8)|0xff; ...; // Y Mask in pixels
cmp r10, #2
moveq r1, #0x0007
movgt r1, #0x00ff @ r1=ymask=(height<<8)|0xff; ...; // Y Mask in pixels
add r10, r10, #5
cmp r10, #7