Re: Faster IEEE routines

Date: Thu, 25 May 2017 14:17:37 +0200
Message-ID: <>
Hallo Mike,

> I suggest that any new protocol using the IEEE-488 lines should be
> designed to be compatible with the 75160/75161 transceivers. This
> will allow it to be used on the CBM-II computers and ...

I don't realy understand this. I used CBM-HD connected to CBM and 
CBM-II computers without any problem. I also tried CBM-PC with the 
2031LP, the only drive with 75160/75161 AFAIK: no problems as well.

IEEE-488 is a protocol and should be hardware independent. Same for 
RS-232. This enables me to connect a C64 to a PC and exchange data 
without the fact that a machine has to worry about what hardware the 
other machine is using.

> It has a mode where six of the eight data lines are used as
> outputs while the remaining two are used as inputs.

When doing that then the SoftBox is not using the IEEE protocol 
anymore because IEEE requires the 8 data lines either input or 
output and not using a weird mix. And on its turn you cannot blame 
the CBM-II not understanding this weird behaviour.

Kind regards / Met vriendelijke groet, Ruud Baltissen

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Received on 2017-05-25 13:01:25

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