Re: Two 1541-II drives with problems

From: Spiro Trikaliotis <*ml-cbmhackers_at_trikaliotis.net*> Date: Mon, 21 Apr 2014 22:04:08 +0200 Message-ID: <20140421200407.GA26146@hermes.local.trikaliotis.net> · ml-cbmhackers_at_trikaliotis.net

Hello,

* On Sun, Apr 20, 2014 at 11:52:55AM +0200 silverdr@wfmh.org.pl wrote:
> Right, good point! Checking the error channel can give a good hint too!

Exactly.

First try: Try to speak with the drive without and disk interaction:

1. RESET the drive & the computer (i.e. by switching everything off and
   on)

2. Type the following program:
   10 OPEN 1,8,15
   20 GET#1,A$:PRINT A$;:IF ST<>64 GOTO 20
   30 CLOSE 1

3. RUN it.

4. Do you get any output (if yes: What?)
   Or does your drive hang?

   If you get any output, the IEC connection works, and you have problem
   with the drive itself. (For example, the S.O. bit on the 6502, or
   the DC VIA). If your drive (or computer) hangs, then you have a
   problem with the IEC bus (the 7406 drive, the BC VIA, ...)

Tell us your result, and we might be able to help you more.

Regards,
Spiro.

-- 
Spiro R. Trikaliotis
http://www.trikaliotis.net/

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