Re: Faster IEEE routines

From: Mike Naberezny <>
Date: Wed, 24 May 2017 14:30:25 -0700
Message-ID: <>
On 5/24/17 2:02 PM, Jim Brain wrote:
> How did you resolve the 6/2 versus 8/0 or 0/8 issue as part of the conversion, 
> or did that issue force the effort to stop?

I did get the SoftBox running with the CBM-II machines.  I came up with a hack 
for the transceiver issue, which I explained here:

It depends on careful timing to know when the SoftBox is in a certain state. 
This is possible because the SoftBox doesn't use interrupts.  I don't like 
this solution but it does allow the unmodified SoftBox to be used with the 
CBM-II machines.  It would be better to modify the SoftBox so its protocol is 
compatible with the 75160/75161.  I also disassembled the SoftBox BIOS so I 
might make that change at some point.


Mike Naberezny (

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Received on 2017-05-24 22:01:22

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