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SubjectRe: NeoGeo bios z80 check Reply to this message
Posted bymasterzog
Posted on09/21/07 02:48 PM



Yeah that's how you trick the 68k into thinking the Z80 is there.

I'm trying to put the Z80 in for real now =)


> Hi,
>
> As far as I remember you need to return 1 when read from address 0x320000. I
> think thats how removed the "Z80 Error" message.
>
> stay safe,
>
> AamirM
>
> > To answer my own question for anyone who's curious:
> >
> > The bios will be happy with just the Z80. No ym2610 is needed.
> >
> > > The neogeo bios does a test of the Z80, and hangs with an error message if
> the
> > > Z80 behaves improperly.
> > >
> > > How much of the Z80 needs to be emulated to pass this test? Will the Z80
> pass
> > > on its own (with the ym2610 stubbed out), or does it need parts of the
> ym2610
> > as
> > > well?
> > >
> >
>




-
Entire Thread
Subject  Posted byPosted On
*NeoGeo bios z80 check  masterzog09/19/07 06:33 PM
.*Re: NeoGeo bios z80 check  masterzog09/20/07 01:41 PM
..*Re: NeoGeo bios z80 check  AamirM_Nugen09/21/07 00:02 AM
....Re: NeoGeo bios z80 check  masterzog09/21/07 02:48 PM