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zyonee / opencbm

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xum1541 on a promicro, 1571 and SRQ nibbling #3

Open ghost opened 6 years ago

ghost commented 6 years ago

Hello,

First, if this is not the place to ask those questions, sorry for the noise and please advise on where to post. The opencbm mailing list seems to be for software questions only, so I do not know of a better place.

I built a pro-micro based adapter for connecting to a 1571 drive using the standard IEC cable, and succeeded and reading and writing D64 files. All of that is only possible because of the opencbm project and more specifically this fork, so thanks !

I am now interested in using the SRQ nibbling protocol with the 1571 and an IEC cable, without adding a parallel bus to the drive. I understand that I need the 7406 variant of the hardware for that. Is that correct ?

If so, I would need some help making sense of the diagram and README notes I found in the repository. If not using the parallel cable, do the lines labelled D0, D3, D4, D6, C7 in the schematic correspond to CLK_OUT, DATA_OUT, SRQ_OUT, RST_OUT, ATN_OUT ? And are the D1, D2, D5, D7, C6 lines the corresponding *_IN ? Or is this the opposite ?

Thanks for your time. Regards,

ghost commented 6 years ago

It turns out the nibtools actually work fine with the simple schematic (without the 7406). The second question (about the schematics) still stand, though.