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The IBM/Xebec Variation #3 is what MartyPC emulates. It only supports 10MB and 20MB drives, but I have hardcoded the emulated jumpers into the 20MB position so that's what you have to use for the moment. MFM hard drives didn't get much bigger than that, at some point it makes more sense to implement an XTA/IDE controller like XTIDE |
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would pull requests with a hack way to increase the size of hard drive be accepted if's turnable by the config setting? |
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depends on how ugly of a hack it is. how were you planning it? |
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what would be the good target for implemention? perhaps the controller the is already implemented - IBM/Xebec
which variation of the Xebec adaptor was used? if this one, was did it support any hard drives over 20mb? or its better to implement this one?
from
Click here to see IBM's technical document for this variation of the card (contains matching circuit diagram).
Click here for a cabling information.
Click here for information about low-level formatting.
Click here for information about the controller's power-on diagnostics (POD).
Click here for the code contained in the two ROM's.
here
it says that only 4 geometries were supported. Unable to determine which, seeking for information.
some info that is lacking here (in Russian, includes original disassembly of rom). long forum thread in Russian.
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