Re: 8250-test/demo diskette

From: Marko Mäkelä (
Date: 1999-01-20 22:08:54

On Wed, 20 Jan 1999, Ruud Baltissen wrote:

> Marko, my idea is to copy the file to my 4040 and make a D64-image of it and 
> send that to you by email.

Please send it both as a 8250 disk image (created e.g. with the prdisk
program of my prlink package) and as individual files or as a 4040 disk
image.  It may be that there currently isn't any software that supports
8250 disk images, but having an original 8250 disk image helps one to
develop such tools.  There could also be some interesting stuff on the
unused blocks of the disk, e.g. deleted files.

> I also can make a physical copy and send that by post. Please let me
> know what you prefer (or even both). 

I don't have a 8250 compatible disk drive, so this is not of much use for 

> I never have used the SW method with a 1541 so I have to look this up as
> well in case this way can be used with the IEEE-drives as well. 

There are two or three variables on the zero page that hold the device
number.  I don't remember the details, but I think on the 1541 one M-W
command is enough, since the addresses (both for listen and for talk,
maybe also as raw number 0-15) are stored in consecutive addresses.

> Andre, I repaired my EPROMMER and I hope I'm able to read out the
> CHARROM of my German 8032-SK as you asked me a looooooooong time ago. 

I'm also eager to get more PET firmware.


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