11 Nov
2003
11 Nov
'03
8:28 p.m.
----- Original Message -----
From: "Nico de Jong" <nico(a)farumdata.dk>
To: "Geoff Reed" <geoffr(a)zipcon.net>
Sent: Wednesday, November 12, 2003 8:25 AM
Subject: Re: OMT MFM 5200 disk controller board
Hi Geoff
The 512 and 7250's come in pairs.
The 512 is an 8 bit SCSI controller. I have the strapping documentation
available. The 7250 connects to the 512 (cables available).
The 7250 has the following connectors :
J1 - 50 pin SCSI interface
J2 - 34 pin ESDI or MFM disk control connector
J3, J4 - 20 pin data cable connector
J7 - 34 pin floppy connector
J10 - power connector (like 5.25" floppy disk, but DONT connect the +12V.
It
will fry the board....)
The 512 supports up to seven SCSI devices. It can be strapped to 4 IO
adresses.
The major thing is the software. Originally, it was used with the EMS
Media
Conversion software. The card has a BIOS socket, but
I've never seen the
BIOS. A qualified guess is therefore that you can only use the cards if
you
have the EMS software, unless you can find a BIOS.
As the software rights were sold to IBM in 1993, I sincerely doubt if I
can
give you a copy of the software. The EMS company went
belly up, and IBM
bought the assets.
Nico
----- Original Message -----
From: "Geoff Reed" <geoffr(a)zipcon.net>
To: <nico(a)farumdata.dk>
Sent: Wednesday, November 12, 2003 7:59 AM
Subject: Re: OMT MFM 5200 disk controller board
> are the OMTI's you have SASI to MFM cards? I am looking for some for
> TRS-80 use.
>