Let's develop an open-source media archive standard

From: Steve Thatcher <melamy_at_earthlink.net>
Date: Thu Aug 12 16:56:18 2004

I seem to recall that my slow old N* Horizon was doing dd at 4mhz with no dma - in fact it was polled I/O because their wait for I/O available kept locking up so I modified it.

best regards, Steve Thatcher

-----Original Message-----
From: Fred Cisin <cisin_at_xenosoft.com>
Sent: Aug 12, 2004 5:12 PM
To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk_at_classiccmp.org>
Subject: Re: Let's develop an open-source media archive standard

On Thu, 12 Aug 2004, Dwight K. Elvey wrote:
> Hi Jules
> Here is what I've found. It is a disk drive emulator.
> Unless a PC is DMA driven, bit banging a floppy is not practical.

Disk I/O without DMA is not practical. But it IS possible.
Consider the PCJr and Tandy 1000, both of which do disk I/O
without DMA on 4.77MHz? machines.
Received on Thu Aug 12 2004 - 16:56:18 BST