Re: Faster IEEE routines

From: Jim Brain <>
Date: Wed, 24 May 2017 21:52:34 -0500
Message-ID: <>
On 5/24/2017 4:30 PM, Mike Naberezny wrote:
> 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.

Did you decide on whether to create a reproduction of this unit?  It 
sounds like a cool thing to utilize, but I assume they are scarce.


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Received on 2017-05-25 03:00:03

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