RE: CBM 1541 (fwd)

From: Marko Mäkelä (
Date: 2000-11-16 08:54:32

On Thu, 16 Nov 2000, COPLIN, Nicholas. wrote:

> Interestingly you can use the faster speed with UI- if you blank the screen
> on the C64/128 before doing the disk I/O.

You should also remember to disable the sprites.  And even the longer
timeout is insufficient if all sprites are enabled on a PAL C64.  In this
case, almost all CPU cycles will be stolen on a bad line, stopping the C64
almost completely for 64 microseconds.  That's why programs that show
sprites on the screen and use KERNAL routines for disk I/O turn sprites
off while loading.


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