OMT512/7250 controller board

From: Nico de Jong <nico_at_farumdata.dk>
Date: Wed Nov 12 01:28:02 2003

----- Original Message -----
From: "Nico de Jong" <nico_at_farumdata.dk>
To: "Geoff Reed" <geoffr_at_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_at_zipcon.net>
> To: <nico_at_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.
> >
Received on Wed Nov 12 2003 - 01:28:02 GMT