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Title: Replacing the Z80A Post by: dfiorucci on June 16, 2018, 05:07:07 PM Hi,
I bought two used Z80A 4mhz chips to replace the ones in my EII IC21 & IC66 since it won't boot. Was just wondering do these need to be programmed prior to replacing them or is it just a direct swap. I tried the direct swap already and things where worse no display at all. Possibly these are bad chips what do you expect from ebay sometimes. So any ideas EII powers up I get Emulator 2 Boot in Progress and two clicks from the drive then nothing more. I've verified all of the memory using the debugger though I get one error for the drive when testing them Both drives result the same T D 1 1 CRC: CR1: WT: WT1: XFR: 0000 807F 0000 0000 0000 |