Mercurial > repos > blastem
changeset 24:30ae73f96267
Partially fix BG plane B
| author | Mike Pavone <pavone@retrodev.com> |
|---|---|
| date | Sat, 08 Dec 2012 16:09:43 -0800 |
| parents | 3e924bb56560 |
| children | 4d0c20ad815a |
| files | vdp.c |
| diffstat | 1 files changed, 3 insertions(+), 4 deletions(-) [+] |
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--- a/vdp.c Sat Dec 08 16:02:17 2012 -0800 +++ b/vdp.c Sat Dec 08 16:09:43 2012 -0800 @@ -129,9 +129,8 @@ //TODO: Implement me } -void read_map_scroll(uint16_t column, uint32_t line, uint32_t scroll_reg, uint16_t hscroll_val, vdp_context * context) +void read_map_scroll(uint16_t column, uint32_t line, uint16_t address, uint16_t hscroll_val, vdp_context * context) { - uint16_t address = (context->regs[scroll_reg] & 0x38) << 10; uint16_t vscroll; switch(context->regs[REG_SCROLL] & 0x30) { @@ -186,12 +185,12 @@ void read_map_scroll_a(uint16_t column, uint32_t line, vdp_context * context) { - read_map_scroll(column, line, REG_SCROLL_A, context->hscroll_a, context); + read_map_scroll(column, line, (context->regs[REG_SCROLL_A] & 0x38) << 10, context->hscroll_a, context); } void read_map_scroll_b(uint16_t column, uint32_t line, vdp_context * context) { - read_map_scroll(column, line, REG_SCROLL_B, context->hscroll_b, context); + read_map_scroll(column, line, (context->regs[REG_SCROLL_B] & 0x7) << 13, context->hscroll_b, context); } void render_map(uint16_t col, uint8_t * tmp_buf, vdp_context * context)