Re: MMF9000 Mystery

From: Gerrit Heitsch <gerrit_at_laosinh.s.bawue.de>
Date: Mon, 4 Oct 2021 10:01:38 +0200
Message-ID: <250529c9-8d45-94f3-8f3f-9891206b254f_at_laosinh.s.bawue.de>
On 10/4/21 8:06 AM, Bo Zimmerman wrote:
> Hello all,
> 
> I recently got a spare option rom (UD11 & UD12) switch panel, of the 
> kind often found on the 3-board MMF9000s.  One of the two sockets in it 
> had a 901465-02, which is a BASIC-2 rom.  I figured the prev owner must 
> have had that chip sitting around and stuck it in there so it would feel 
> wanted.
> 
> Anyway, I started investigating whether this switcher board might be 
> useful in my single board SP9000, so I opened up my MMF and investigated 
> how it was hooked up in there.
> 
> To my shock, surprise, and great amusement, I found that my MMF9000 rom 
> switcher sockets contained 901465-01 and 901465-02.  So I guess the chip 
> in the new rom-switcher I got was no fluke!
> 
> What explains this though?  Of what possible use is a pair of BASIC-2 
> roms in option rom sockets of the 8032 board of the MMF9000?

Have you verified that the ROM really contains what the printed number 
suggests?

  Gerrit
Received on 2021-10-04 11:00:02

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