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author angelosa <salese_corp_ltd@email.it>2018-02-23 21:49:28 +0100
committer angelosa <salese_corp_ltd@email.it>2018-02-23 22:04:11 +0100
commit9842fc438ad42cbd3f0d20350a4a951ac97f8be4 (patch)
tree4daa325a42b98e39e3f893eb45f1262c069aba48
parentdf70e74699a887b5aa7c12a9324ac54e83e85d52 (diff)
doa protection was actually good this way, mangled 3d is caused by comms or core bugs (nw)
-rw-r--r--src/mame/machine/315-5838_317-0229_comp.cpp4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/mame/machine/315-5838_317-0229_comp.cpp b/src/mame/machine/315-5838_317-0229_comp.cpp
index 39b4e0ade72..f9f80522ada 100644
--- a/src/mame/machine/315-5838_317-0229_comp.cpp
+++ b/src/mame/machine/315-5838_317-0229_comp.cpp
@@ -331,12 +331,14 @@ READ32_MEMBER(sega_315_5838_comp_device::doa_prot_r)
if (offset == 0x7ff8/4)
{
- retval = m_protram[m_protstate] | m_protram[m_protstate+1]<<8;
+ // PC=2c20
+ retval = m_protram[m_protstate+1] | m_protram[m_protstate]<<8;
m_protstate+=2;
printf("doa_prot_read %08x %08x %08x\n", offset*4, retval, mem_mask);
}
else if (offset == 0x400c/4) // todo, is this actually part of the protection? it's in the address range, but decathlete doesn't have it afaik.
{
+ // this actually looks a busy status flag
m_prot_a = !m_prot_a;
if (m_prot_a)
retval = 0xffff;