Stuttgart HP Meeting 2024 (replacement Allschwil)
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10-21-2024, 04:06 PM
Post: #42
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RE: Stuttgart HP Meeting 2024 (replacement Allschwil)
(10-21-2024 03:33 PM)Dave Frederickson Wrote: Then there's type C, like HP, who identified the Finance ROM as an IRAM and not a ROM. How should this ROM image be archived? To add to the confusion, the HP and CMT checksums are not the same ! HP was using a checksum byte for each 16k block, because they used 16k ROM chips and it was a way to know which chip was bad in a module. Because the CMT modules were based on a 32k or 64k single-chip EPROM, the CMT tools associated with the CMT-71-P01 EPROM programmer were using a single checksum byte for the entire module: Quote:PTGENC$ Of course, it was possible NOT to use PTGENC$ and rely on ROMCOPY or EPRMCPY instead for the checksum byte(s). J-F |
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