I use an "older" JDR MOD EMUP hooked up to a 386 DX40. It does all the things John mentioned TTL/CMOS testing, RAMs, some Micro Controllers, Bipolar PROMs, PALs, GALs etc.. It does not do the ancient 2708 tri voltage stuff. There is/was some sortta speed issue with computers & controllers. They don't recommend hooking the EMUP into machines faster than 50 Mhz (it has a ISA card). The newer series connects to either serial or parallel port but most of these units are $800+. Think about how you intend to use this device. I use mine to sort thru loose RAM chips and to verify ROM chips but I don't use it much as a troubleshooting tool because... 99% of the RAMs you suspect to be the problem are soldered in and ROM chip may checksum fine but may breakdown under actual operation. I also agree with John on the Xeltek, I had a super pro & ended up returning it after it blew up burning 2532's. Kev mowerman@erols.com
Some of the universal eprom programmers also test many devices. I have a Xeltek (II don't recommend it) that will test 74XX, CMOS and a few different RAM as well as burn proms, eproms, gals, pals,,,,,
John :-#)#
At 02:34 PM 3/19/2000 -0500, Magiera, Joe (AIT) wrote:
Sorry for the beginner's question.
What specific device would people recommend for a RAM/ROM (and other chip) tester?
Joe
joe.magiera@ameritech.com
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