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From: breemen@rulcvx.LeidenUniv.nl (E. van Breemen)
Newsgroups: comp.sys.amiga.hardware
Subject: Mitsubishi drive jumpers, Info needed.
Message-ID: <1991May21.215625.884@rulway.LeidenUniv.nl>
Date: 21 May 91 21:56:25 GMT
Sender: root@rulway.LeidenUniv.nl (System PRIVILEGED Account)
Organization: Leiden University, the Netherlands.
Lines: 47
Nntp-Posting-Host: rulcvx.leidenuniv.nl


Hello world,

I want to connect an old 80 tracks 5.25 inch disk drive to my Amiga 500.
I build the well-known '7474 circuit'. The circuit works well with a
newer Chinon drive. 
Now I want to connect the old drive, a remainder of my Acorn BBC-B system.
The drive is a Mitsubishi Mini Flexible Disk Drive, model M4853-112M,
dated 03-1984. On this drive there are 3 groups of jumpers. 

Group 1:

 ----
 |--| HS <-- Jumpered for BBC.
 |..| HC
 |..| HM
 |..| HL
 |..| HH
 ----

Group 2:

 ----
 |..| DC
 |..| 2S
 |--| MM <-- Jumpered for BBC.
 |..| MS
 |--| IU <-- Jumpered for BBC.
 ----

Group 3:

  DS
 ----
 |..| 3
 |--| 0 <-- Jumpered for BBC.
 |..| 1     This is probably the drive select group.
 |..| 2
 |..| MX
 ----

My questions: Who knows the meaning of the letters and who knows
how I have to change the jumpers to let the drive work on my Amiga?
Does this drive support the diskchange signal?
If you have this information, please e-mail! Thanks in advance.

Greetings, Raymond Hoving.