Defining Disk Image Dump Standard

From: Sellam Ismail <>
Date: Thu Jun 1 16:03:04 2000

On 1 Jun 2000, Eric Smith wrote:

> After all, everyone knows that a 1 MHz 6502 isn't fast enough to do disk
> control in software at all! :-) Woz's design is a classic example of
> "thinking outside the box". IIRC, he was quoted somewhere as saying
> that he didn't previously have any knowledge of the design of disk
> controllers, so he just designed what he thought would be necessary.

But can you dedcode 6&2 encoded bytes in realtime on a 6502? Something
tells me it's not fast enough to do this.

> Once the Intel 8271, WD 1771, and similar FDC chips became available,
> any idiot could "design a disk controller". But if you compare Woz's
> design with other pre-FDC-chip designs, Woz's has 1/10 as many chips
> as some of them.

6 to be exact.

Sellam International Man of Intrigue and Danger
Looking for a six in a pile of nines...

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Received on Thu Jun 01 2000 - 16:03:04 BST

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