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-rw-r--r--vdp.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/vdp.c b/vdp.c
index 961968a..3af6bc6 100644
--- a/vdp.c
+++ b/vdp.c
@@ -411,7 +411,7 @@ void read_map_scroll(uint16_t column, uint16_t vsram_off, uint32_t line, uint16_
switch(context->regs[REG_SCROLL] & 0x3)
{
case 0:
- hscroll_mask = 0xF0;
+ hscroll_mask = 0x1F;
v_mul = 64;
break;
case 0x1:
@@ -424,7 +424,7 @@ void read_map_scroll(uint16_t column, uint16_t vsram_off, uint32_t line, uint16_
v_mul = 0;
break;
case 0x3:
- hscroll_mask = 0x3F0;
+ hscroll_mask = 0x7F;
v_mul = 256;
break;
}