Hi, I've got a noob question regarding ram testing and using the 9010. I'm trying to build a script to do some basic testing on Return of the Jedi using a known working board as a benchmark. So far I'm just concentrating on the main CPU, not the sound CPU and I've got the ROM test all working, now I'm moving on to the RAM. The schematics for Jedi list a ram area at 2400-27FF as Scrolling Playfield(high) and this appears to me to only have 4 data bits. If you run the built in RAM test on the Fluke for this area it fails, and from what I've managed to glean from the reading I've done this is as it should be as only 4 bits of data area are returned (a nibble?), whereas I assume the RAM test algorithm uses a whole 8 bits (byte). I've written the following script to exercise this (and other similar RAM areas). Can you tell me if I'm on the right lines? So far I've never done anything other than the built in 9010 tests so forgive me if this is a stupid question; REG1 = 2400 1: !LABEL 1 IF REG1 = 2800 GOTO 3 WRITE @ REG1 = FF WRITE @ REG1 = AA READ @ REG1 IF REGE = FA GOTO 2 dpy Failed Response = $1 = $E aux Failed Response = $1 = $E GOTO 3 2: !LABEL 2 aux Success Response = $1 = $E INC REG1 GOTO 1 3: !LABEL 3 dpy TEST COMPLETE aux TEST COMPLETE Cheers, Dan -- I am using the free version of SPAMfighter. We are a community of 6 million users fighting spam. SPAMfighter has removed 25777 of my spam emails to date. Get the free SPAMfighter here: http://www.spamfighter.com/len The Professional version does not have this message _______________________________________________ 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/