I got the polynomial from the HP documents on Spies http://www.spies.com/arcade/TE/HPJMay77.pdf page 8. Thanks for calling our attention to that BASIC utility, perhaps it now can be loaded into either ROMIDENT (and output Sigs) or ROMSUM (Bill Ung's utility - he said if anyone worked it out he'd be happy to add it in) John :-#)# At 11:08 PM 06/05/2002 +0100, Phillip Eaton wrote:
I wrote one of these a few years back. It's part of my Atari Cat Box signature analysis write-up which is held at http://www.gamearchive.com/video/manufacturer/atari/vector/signatures/
It includes a very simple program source code (to aid understanding) to do what you mentioned in MS DOS QBasic for the Cat Box.
You could quite easily use it as a base to write your own, or simply change the polynomial in mine and it'd do what you need.
How did you work out the ploynomial?
Cheers, Phillip Eaton
-----Original Message----- From: owner-techtoolslist@www.flippers.com [mailto:owner-techtoolslist@www.flippers.com]On Behalf Of John Robertson Sent: 06 May 2002 22:03 To: TechToolsList@flippers.com Subject: Re: Gottlieb / Q*bert scripts for the 9010A/9100
What we need is for some bright person to write a simple utility that converts data files to signatures. The signature formula is fairly simple and if combined with Bill Ung's ROMSUM would be a nice tool for our package. If you don't know ROMSUM it is a dos utility that will give a checksum listing plus the ROM size for a single or group of files...
The Signature process is a CRC process that uses the following feedback equation: X(to the 16th) + X(to the 12th) + X(to the 9th) +X(to the 7th) + 1 or P(X) = X(15th) + X(9th) + X(7th) +X(4th) + 1
So who wants to make a simple (not for me!) binary program that allows one to input a file and outputs it's signature?
John :-#)#
At 09:11 AM 06/05/2002 -0400, Kev wrote:
Anyone written any test scripts for these or at the very least have some checksum signatures?
Thanks, Kev