[Techtoolslist] Fluke 9010a 68000 Pod Eprom Testing onOutrun- help please !!

[Colin Davies]

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 at btopenworld.com>
To: <ayeckley at sierralobo.com>; "Technical Tools Mail List" 
<techtoolslist at 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 at sierralobo.com>

> To: "'Technical Tools Mail List'" <techtoolslist at 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 at elektronforge.com

>> www.elektronforge.com

>>

>>

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