Mercurial > repos > blastem
changeset 753:cee1275f5d08
Lame placeholder support for floating bus bits of IO hardware. Needs to be replaced with prefetch based values
author | Michael Pavone <pavone@retrodev.com> |
---|---|
date | Thu, 25 Jun 2015 09:02:42 -0700 |
parents | 296ddfcf0d43 |
children | cfa402c6ced8 |
files | blastem.c |
diffstat | 1 files changed, 4 insertions(+), 0 deletions(-) [+] |
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--- a/blastem.c Mon Jun 22 22:00:44 2015 -0700 +++ b/blastem.c Thu Jun 25 09:02:42 2015 -0700 @@ -643,6 +643,8 @@ } else { if (location == 0x1100) { value = z80_enabled ? !z80_get_busack(gen->z80, context->current_cycle) : !gen->z80->busack; + //TODO: actual pre-fetch emulation + value |= 0x4E; dprintf("Byte read of BUSREQ returned %d @ %d (reset: %d)\n", value, context->current_cycle, gen->z80->reset); } else if (location == 0x1200) { value = !gen->z80->reset; @@ -662,6 +664,8 @@ value = value | (value << 8); } else { value <<= 8; + //TODO: actual pre-fetch emulation + value |= 0x73; } return value; }