TechTools Archives: Re: Fluke 9010a 68000 Pod Eprom Testing onOu

From: James Bright <james_at_quarterarcade.com>
Date: Wed Jun 09 2010 - 16:21:05 EDT

The generated signatures probably aren't correctly for anything more than 8
bit systems. Or at least I don't guarantee it :-).

----------------------------------------

From: "Colin Davies" <colin.w.davies@btopenworld.com>
Sent: Wednesday, June 09, 2010 4:11 PM
To: "Technical Tools Mail List" <techtoolslist@flippers.com>
Subject: Re: [Techtoolslist] Fluke 9010a 68000 Pod Eprom Testing
onOutrun- help please !!

I think the *main* thing that I need to get my head around when using the
68000 pod is that....

If I read 0 > xxxx I get the low (or high ?) 8 bits of the 16 bit data
bus.. (0 > xxxx)
and
If I read 1 > xxxx +1 , I get the other 8 bits of the 16 bit data bus.. ( 0

> xxxx)

Is that right ? - am I understanding this correctly ? or do I need to
double
the xxxx value to take care of the step of 2 ? (or am I just generally
going
nuts ?)

Cheers, Colin

----- Original Message -----
From: "Colin Davies" <colin.w.davies@btopenworld.com>
To: <ayeckley@sierralobo.com>; "Technical Tools Mail List"
<techtoolslist@flippers.com>
Sent: Wednesday, June 09, 2010 8:42 PM
Subject: Re: [Techtoolslist] Fluke 9010a 68000 Pod Eprom Testing onOutrun-

help please !!

> I'll look into the checksums... there was a tool to generate ' FLUKE'
> style checksums , that I used a couple of years ago on and it worked... I

> assume QA has ran them through this algorithm..
>
> I'm 99% sure it's the correct rom revision/s (as its printed on the
> Label/s) but I could pull and read in.....
>
> Outrun is not protected (Turbo Outrun is with an encrypted cpu) , but
> there is a custom chip that sits on the CPU bus's that handles a few
> things, However the address and data bus to the rams and roms come
> straight from the CPU....... Maybe I've chosen something tricky to
> start with ?
>
> I'm just hoping that its noob finger trouble and lack of understanding
> thats the isssue here, lol !!
>
> Regards, Colin
>
>
> ----- Original Message -----
> From: "Alex Yeckley" <ayeckley@sierralobo.com>
> To: "'Technical Tools Mail List'" <techtoolslist@flippers.com>
> Sent: Wednesday, June 09, 2010 8:06 PM
> Subject: Re: [Techtoolslist] Fluke 9010a 68000 Pod Eprom Testing on
> Outrun- help please !!
>
>
>> >Now these are 64k Roms x 8 bits each...... but I'm unable to run ROM
>> >tests
>>>here..... It fails on checksum....!!!!!!!!!!
>>
>> Initial thoughts: Are QuarterArcade's checksum values verified?
>> Different
>> ROM rev perhaps? Any copy protection used on OutRun?
>>
>> Alex
>> ----
>> ayeckley@elektronforge.com
>> www.elektronforge.com
>>
>>
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Re: Fluke 9010a 68000 Pod Eprom Testing onOutrun- help please !!