RE: Weird problem writing buffer 1 of a 8250 drive

ruud.baltissen_at_apg.nl
Date: 2008-09-05 11:51:36

Hallo Anders,
 

>> OK. So far we know that m-w and m-e don't work as it should on a
8250.
>
> Did you try several units,....

Yesterdays conclusions were based on tests in VICE at work and were
confirmed by my 8296-D unit at home last evening. On the other hand one
thing didn't run as expected: the drive didn't reset after the U3
command; at least I didn't notice anything visual and I didn't see a
delay between the two listings. So I decided this morning to run the PRG
on VICE once more and surprise.... no delay either! So instead jumping
to the reset routine I wrote a little ML that should cause a delay of a
few seconds:

.eq Buffer2	= $1300

.ba Buffer2
L1		
		dex
		bne	L1
		
		dey
		bne	l1
		
		dec	Temp
		bne	L1
		
		rts
		
Temp	.by	10
.en

That ran as expected. Now I have to test this at home again.


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