RE: Fast GCR decoding?

From: MagerValp (MagerValp_at_cling.gu.se)
Date: 2005-11-08 10:40:14

>>>>> "RB" == Baltissen, GJPAA (Ruud) <ruud.baltissen@abp.nl> writes:

ST> This scheme is also used with the "warp" routines of
ST> SC/cbm4linux/cbm4win.

RB> Correct. But here is a much much more powerfull CPU crunching the
RB> data.

But on the C64 you have enough space for a table based decoder, which
is much faster than a 1541 bitshifter. The C64 side of the LÍ/MM/KM
irq loader typically spends half the time just waiting for the 1541 to
read and decode a new sector, so it makes sense to move more work over
to the C64.

-- 
    ___          .     .  .         .       . +  .         .      o   
  _|___|_   +   .  +     .     +         .  Per Olofsson, arkadspelare
    o-o    .      .     .   o         +          MagerValp@cling.gu.se
     -       +            +    .     http://www.cling.gu.se/~cl3polof/


       Message was sent through the cbm-hackers mailing list

Archive generated by hypermail pre-2.1.8.