RFC: DiscFerret configuration files

On 05/02/11 14:22, Steven Hirsch wrote: libdiscferret (the C API) relies on bit-twiddling. The Lua scripts are used by the application software (specifically: discferret-read-disc) to handle conversion between a drive 'name' (e.g. 'pc35a-80t') and the lines which need to be made active in order to select the drive (e.g. MOTEN, DS0, ...) and pick the correct head (SIDESEL, DS1, DS2, DS3 or whatever the assignment is). The pindefs generally vary depending on how the drive has been connected. The Winchester adapter board wires HEAD_2^3 to DS3, for instance. This is why there's a script to handle drive selection: I don't want to end up recompiling loads of C code just to change a pindef! The script doesn't talk to hardware directly. Libdiscferret provides the hardware interface layer, in the form of bit-twiddling (actually register POKEs and PEEKs). The Lua script takes a parameter set from the application (current head, track and sector, etc.) and converts these into a pin state. The disc script tells the application what needs to be done to read the disc. That is: - Acquisition mode -- index-locked, MFM-locked, hard-sector mark, ... - Min/max track number - Min/max head number - Disc class (must match the drive's Disc Class; mainly used to stop Winchester profiles from being used with 80tk floppy drives). Does this make it any clearer? Thanks, -- Phil. classiccmp at philpem.me.uk http://www.philpem.me.uk/