Found these inside a non-working 71B
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03-13-2018, 10:22 PM
Post: #71
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RE: Found these inside a non-working 71B
(03-13-2018 09:58 PM)Paul Berger (Canada) Wrote: All of the HHP modules I have use a chip 1LJ4 and if this is the chip that HHP has always used it would be capable of supporting 64K of RAM. Maybe if I play around with the pins that appear to be for configuration and then observe what it reports, I can learn more about it. All my HHP modules have interface IC with erased labels. I took the 1LQ4 reference from this HP part number list. But yes, a 1LJ4 can be seen in a picture in Sylvain's compendium. May did 2 versions exist (like the 1LB3 and 1LR4 HP-IL chips)? J-F |
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