Re: 1571/1581 (RE: Commodore 16)

From: Anders Carlsson (
Date: 2003-09-23 19:32:59

On Tue, 23 Sep 2003, Christian Johansson wrote:

> I also noticed that when sending UI- to a 1571 drive in 1571 mode,

I think it has been discussed elsewhere (in comp.sys.cbm?) whether
the UI- mode/command is properly implemented on 1571 or not. But
even if it is missing, a VIC-20 to my knowledge doesn't automatically
force the unit into that mode and it should not be the reason why
it doesn't work.

(disclaimer: I've never owned a 1571 or 1581, so I couldn't test myself
 with my VIC, but I have a vague memory of at least one success story
 involving the 1581 and VIC-20 ?)

> This program is particularly useful with 64HDD since it gives a speed
> increase of about 28 % when loading a program with 64HDD

Hm. The manual says 25%, and I have only been able to measure 15-20%
on VIC-20 tests using 1541-II. Does the 64HDD solution speed up more
than expected?

Anders Carlsson

"Please not to close to the hair, finger, clothes to run about the
 inside's vehicle, in order to prevent quilt involvement." -- Bit Racer

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