Re: Commodore PLC TIB DD-001 / Drive 2001

From: smf <smf_at_null.net>
Date: Thu, 24 May 2018 13:17:50 +0100
Message-ID: <8ed32e73-0350-bbd7-9e46-2003ca2a5399@null.net>
On 24/05/2018 00:59, Mia Magnusson wrote:
> But not worth the effort with a mechanical disk, as even only using
> half the capacity will be enough for any disk you'll find in the junk
> box.

No good for data transfer though & supporting 16 bit transfers is pretty 
trivial hardware wise.

> You will not gain anything by using the various "DMA" modes on an
> IDE/CF disk with a 1MHz 6502 system as the disk is faster than the
> computer even in the disks slowest mode.

You would gain quite a bit. A 6502 copy loop will take something like 14 
cycles per byte to copy, while using DMA you should be able to average 1 
cycle per byte.

The fastest possible system would use another CPU for handling the file 
system and just DMA the data into and out of RAM.
Received on 2018-05-24 15:01:54

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