Mercurial > repos > blastem
changeset 1136:52f25c41abdd
Fix horizontal scrolling in Mode 4
| author | Michael Pavone <pavone@retrodev.com> |
|---|---|
| date | Sun, 01 Jan 2017 22:47:23 -0800 |
| parents | 8506b305e0e8 |
| children | 9e0f2ea4a0fc |
| files | vdp.c |
| diffstat | 1 files changed, 1 insertions(+), 1 deletions(-) [+] |
line wrap: on
line diff
--- a/vdp.c Sun Jan 01 21:06:32 2017 -0800 +++ b/vdp.c Sun Jan 01 22:47:23 2017 -0800 @@ -983,7 +983,7 @@ } address += (vscroll >> 3) * 2 * 32; //add column - address += (((column << 3) + context->hscroll_a) >> 3) * 2; + address += ((column - (context->hscroll_a >> 3)) & 31) * 2; //adjust for weird VRAM mapping in Mode 4 address = mode4_address_map[address]; context->col_1 = (context->vdpmem[address] << 8) | context->vdpmem[address+1];