[Techtoolslist] Fluke & Midway 8080 boards...(8080 Pod problem)

[John Robertson]

Turns out the 8080 pod has some problem that doesn't show up in the self 
test.

So, the word is - don't trust the self test if you get odd results! Try 
a second pod (if you can).

For anyone working on a Sea Wolf you can test the lamp drivers using 
address 10009h for the hit lights and 1000Ah for the Torpedo lights. 
With the KK kit using the LEDs you can turn either all of them on/off 
with FF/00 or you can turn them on individually with poking around in 
the code. 55/AA alternates the outputs for example...

John :-#)#

On 06/27/2014 4:40 PM, David Shoemaker wrote:
> I have a space invaders deluxe I will be trying tonight.  Will let you 
> know what I find.
>
> David  :-)=
> ------------------------------------------------------------------------
> From: John Robertson <mailto:jrr at flippers.com>
> Sent: ‎6/‎27/‎2014 3:18 PM
> To: techtoolslist at flippers.com <mailto:techtoolslist at flippers.com>
> Subject: Re: [Techtoolslist] Fluke & Midway 8080 boards...
>
> On 06/27/2014 2:31 PM, Rodger Boots wrote:
> >
> > Is there
> > On Jun 27, 2014 1:59 PM, "John Robertson" <jrr at flippers.com
> > <mailto:jrr at flippers.com>> wrote:
> > >
> > > Hi Andrew,
> > >
> > > Well, I'm not sure where the problem is at the moment, I don't
> > recall this happening in the past so indeed it could be my 8080 pod
> > that is part of the problem...
> > >
> > > I did find one cute trick - I have the Kurz Kash fixture and cards
> > for Sea Wolf and while it does allow you to test all the functions the
> > LED lights are difficult to get to light up to make sure that all the
> > driver transistors work. So I put the 8080 pod into Learn mode for
> > 10000h - 1000FFh which is the I/O port for the 8080 and the lights all
> > turn on - at least the lights for the transistors that work...Cute.
> > Otherwise you have to load the the I/O data with 0F or F0 at the
> > correct !/O port address which I haven't gotten around to figuring out
> > yet.
> > >
> > > Still can't get the high end FFs at addresses FF0h to FFFh to be
> > stable though...
> >
> > Is there ROM at high addresses? On an 8080 the ROM should be from 0000.
> >
> By high address I meant 0FFFh, not FFFFh. It was the high end of the ROM
> space which is 0 - 0FFFh in Sea Wolf. The RAM test (2000h - 3FFFh) works
> just fine.
>
> Annoying.
>
> John :-#)#
-- 
How to subscribe or unsubscribe from TTL 
http://seven.pairlist.net/mailman/listinfo/techtoolslist