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Fix sprite address check.

This commit is contained in:
Andrew Alderwick 2022-03-06 20:39:21 +00:00
parent 3b3386b544
commit 1d694c43ea
1 changed files with 1 additions and 1 deletions
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2
src/devices/screen.c
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@ -166,7 +166,7 @@ screen_deo(Device *d, Uint8 port)
n = d->dat[0x6] >> 4; n = d->dat[0x6] >> 4;
dx = (d->dat[0x6] & 0x01) << 3; dx = (d->dat[0x6] & 0x01) << 3;
dy = (d->dat[0x6] & 0x02) << 2; dy = (d->dat[0x6] & 0x02) << 2;
if(addr > 0xfff8 - twobpp * 8 * (n + 1)) if(addr > 0x10000 - ((n + 1) << (3 + twobpp)))
return; return;
for(i = 0; i <= n; i++) { for(i = 0; i <= n; i++) {
screen_blit(&uxn_screen, layer, x + dy * i, y + dx * i, &d->u->ram[addr], d->dat[0xf] & 0xf, d->dat[0xf] & 0x10, d->dat[0xf] & 0x20, twobpp); screen_blit(&uxn_screen, layer, x + dy * i, y + dx * i, &d->u->ram[addr], d->dat[0xf] & 0xf, d->dat[0xf] & 0x10, d->dat[0xf] & 0x20, twobpp);