Feature drv1541parallel#21

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ytmytm wants to merge 27 commits intomist64:masterfrom

ytmytm:feature-drv1541parallel

Commits on Mar 25, 2024

1541 ROM calls documented using All About Your 1541 http://unusedino.de/ec64/technical/aay/c1541/index.htm
Maciej Witkowiak
committed
1541 disk driver with serial communication replaced by parallel (standard: VIA pins 2-9,18,39) cable
Maciej Witkowiak
committed
optimizations
Maciej Witkowiak
committed
maximum drive code size is -bash400 (-bash300--bash6ff), calculate on the fly number of 32-byte (0) chunks needed to be sent via memory-write
Maciej Witkowiak
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more macros and comments
Maciej Witkowiak
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improve parallelism a bit
Maciej Witkowiak
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fix Drv_SendByte_0 to send exactly two bytes as status: length (1) and content (value from -bash0)
Maciej Witkowiak
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optimized drive->host transfer procedure from 35 cycles down to 27/28
Maciej Witkowiak
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remarks and optimal interleave setting
Maciej Witkowiak
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updated with drv1541parallel mentions
Maciej Witkowiak
committed

Commits on Mar 30, 2024

found that 6 is the optimum interleave value
Maciej Witkowiak
committed

Commits on Apr 4, 2024

parallel version with otf-gcr decoding but will crash on write
Maciej Witkowiak
committed
optimal interleave
Maciej Witkowiak
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working read/write version, buffer at 0x700 cached at 0x200 reloaded if needed, same with ZP code
Maciej Witkowiak
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more comments, remove dead locations and code
Maciej Witkowiak
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faster turnaround for WriteBlock
Maciej Witkowiak
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more general memory recieve routine
Maciej Witkowiak
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faster code upload (forced after every ExitTurbo), make ExitTurbo reset, we are at the size limit
Maciej Witkowiak
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simplify ExitTurbo (reset only), used gained space to check for missing block header error
Maciej Witkowiak
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corrected Enter/Exit/PurgeTurbo to correctly handle each case
Maciej Witkowiak
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scan for 1541s on the bus and send M-W command to set port A as input
Maciej Witkowiak
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more corrections for uploading code to drive, handle ReadBlock without prior NewDisk (caused by Configure)
Maciej Witkowiak
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remove all code related to disk cache, no space for that
Maciej Witkowiak
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correct ExitTurbo to preserve device number
Maciej Witkowiak
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don't send page 07xx twice, move ExitTurbo to the end to fit whole WriteSector under 0x700
Maciej Witkowiak
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reorder drivecode to send fewer bytes via slow M-W
Maciej Witkowiak
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docs
Maciej Witkowiak
committed