The generated signatures probably aren't correctly for anything more than 8 bit systems. Or at least I don't guarantee it :-). JB ---------------------------------------- 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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_______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ftp.flippers.com/TTL/TestEquipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/ _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ftp.flippers.com/TTL/TestEquipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/