March 2008 - TechToolsList - listserv.classicarcade.com

Keyboard adapter update
by martin＠guddler.co.uk 09 Mar '08

09 Mar '08

Hi all, Last post from me on this subject, I won't keep spamming the list, especially since my site has an RSS feed :) Just thought I'd mention that I just posted a version of the code and a new circuit to go with it that has a USA keyboard layout and I also made a couple of minor modifications so that if you're that way inclined, hooking up an in-circuit debugger / programmer won't do nasty things to your 9100 (usual disclaimer applies but it works for me!) http://guddler.co.uk Enjoy. Martin. _______________________________________________ Techtoolslist mailing list Techtoolslist(a)flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist

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Strange e-prom question
by Brian 09 Mar '08

09 Mar '08

I need to read a M27C4002 part however my e-prom burner can only handle chips up to 32 pins (up to 8mb). I would expect that there would be some way to read the low 2MB and then read the high 2MB's. I have looked at the data sheets for M27C4002, 4001 and 2001, but I just can't figure how to (safely) do it. Any advice would be greatly appreciated, Brian _______________________________________________ Techtoolslist mailing list Techtoolslist(a)flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist

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Example code for Calculating CRC32 on the Fluke 9100
by Andy Welburn 05 Mar '08

05 Mar '08

hi all. Well, after running into this on more than one occasion, i decided to do something about it, you know when you have soldered-in roms on a game pcb and you don't have any 'good' signatures for that rom in particular? Don't want to have to desolder the rom? Don't have a reader capable of reading that funky rom? Still want to check the roms contents with a known good dump? I'm working on an Atari Sprint 2 pcb right now with just such a problem, after building an adapter to replace the 2k*8 PROM soldered-in with a 2716, i could then verify that i did have a bad prom there, and subsequently managed to verify all other roms by burning a bunch of 2716's with mame code and verifying sigs taken from the real roms in place against the known good 2716... However, while doing this, i pestered a few peopel into trying to crack the fluke 9100 signature calculation routine so that i could run it on mame roms and verify on the fluke itself. This is no easy task and i've been asking around for this for a while now... so i gave up, and thought to myself it would be great if i could calculate a reliable signature on the 9100 that is easily calculated on the pc on mame roms... Well then CRC32 is an answer to this, MAME carries CRC32's of all the roms it uses in all its game drivers, an excellent source of known-good sigs! With the help of Chris Hardy - who found this small CRC calculator code online - it looked like it could be converted for TL/1 use: http://www.di-mgt.com.au/crypto.html#CRC My C programming skills are very rusty, and it saved me a lot of time talking to Chris to just check on the meanings of the C statements in this CRC calculator code... Once Chris explained some of it to me in English, it helped me to translate it to what i know of TL/1... and here's the result of equivalent code : http://www.andysarcade.net/pix/DSC_2380.JPG (full program code omitted, but if you know TL/1 you know the meat and potatoes is in the middle bit - so long as you declare numeric crc=$FFFFFFFF, numeric temp, numeric j, numeric octets at the top) I'm no rocket-scientist, but i stuck this in my PROGLIB and it'll now be available to all my other UUT programs :) Its not tidy code, its not the quickest or most efficient, but it works... If you can suggest a better way of doing it, then please do expand on this if you can! I'm interested to hear who is actually actively programming on the 9100, is it just me all on my own?? I know a few people who own the 9100 units, but i'm the only one amongst them that seems to be using the editing suite... Whats the situation with you lot here on the list? A show of hands would be nice to see... Maybe we can pool resources and swap code snippets? I have hundreds of rom sigs and a growing collection of programs i have written, I understand anyones reluctance to give this info up for free (i have certainly put in a considerable amount of time on the fluke) so i'm looking to trade info with other people if anyone needs it? Personally i'm not after much info myself, but i'm always keen to add to my own knowledge base, and i don't mind helping others out with programming, and advice on the pitfalls of bugs in TL/1 etc.. :-) Of course, I could be delusional and I really am the only one doing any programming with it... so speak up! Andy Welburn http://www.andys-arcade.com _______________________________________________ Techtoolslist mailing list Techtoolslist(a)flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist

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