From 4802e603569557fbc0e8086703d562ffa52236c7 Mon Sep 17 00:00:00 2001 From: Michael Pavone Date: Thu, 25 Jun 2015 09:02:42 -0700 Subject: Lame placeholder support for floating bus bits of IO hardware. Needs to be replaced with prefetch based values --- blastem.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'blastem.c') diff --git a/blastem.c b/blastem.c index c3d1bd4..fcbcd52 100644 --- a/blastem.c +++ b/blastem.c @@ -643,6 +643,8 @@ uint8_t io_read(uint32_t location, m68k_context * context) } 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 @@ uint16_t io_read_w(uint32_t location, m68k_context * context) value = value | (value << 8); } else { value <<= 8; + //TODO: actual pre-fetch emulation + value |= 0x73; } return value; } -- cgit v1.2.3