Re: A86: Re: new emulator

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Re: A86: Re: new emulator


Oi! That's different! =)

Isn't the processor in the Palm III a Z80? (I thought it was.) If it is, why
are you working on an emulator? All you would need to do is handle the ports
(i.e., lcd, keyboard). Now of course I may be wrong, it may just be the
original Palm Pilot that had a Z80. In any case, how are you testing your
Z80 core on the computer when the computer has an x86? If Palm III has x86,
I wrote a Z80 core in pure asm that you can look at (if nothing else, for
comparison)...

----- Original Message -----
From: Liyang Hu <liyang@liyang.freeserve.co.uk>
To: TI-Emu ML <ti-emulator@lists.ticalc.org>; TI-86 Asm ML
<assembly-86@lists.ticalc.org>
Sent: Tuesday, December 21, 1999 2:07 PM
Subject: RE: A86: Re: new emulator


> Oh well, I might as well tell you about it - I'm writing the emu for my
Palm
> III.
> I think I have most of the core logic bits done (On the PC, that is. It'll
> be ported over to the Palm as soon as I figure out how the keyboard
works),
> but I have problems implementing the keyboard handler - I'm using TI86Emu
> (the one written in C++ builder) as my only debugging tool / reference.
Note
> however that I do not want a cycle-perfect emulation of the core, I want
it
> to be as fast as possible. My problem is this - my Z80 core deviates from
> TI86Emu whenever I'm going through the keyboard code (although that's
kinda
> expected), but the keyboard handling stuff isnt quite working. I'm not
> really sure if it's my handler code or whether I'm misimplementing some
> opcode somewhere... I was hoping for something that will test the Z80
core,
> not my keyboard handler :)
>
> nb: the emu works to the point where I have a flashing cursor sitting
there
> at the home screen... if only the keyboard works...
> --
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