Re: Plus/4 RS232 woes

From: Mia Magnusson <mia_at_plea.se>
Date: Sat, 8 Sep 2018 09:22:31 +0200
Message-ID: <20180908092231.0000266d@plea.se>
Den Fri, 7 Sep 2018 09:57:29 +0200 skrev Konrad B
<konrad0x42@gmail.com>:
> > They of course did choose what IC's Commodore made in-house as they
> > seemed fit for purpose, an 8-bit CPU and UART's that were specified
> > to run at up to 19200 baud.
> 
> In theory 3.58 MHz 65ce02 (yes, it is _CE_ - thus you guys with A2232
> treat them well, when the 65ce02 breaks I bet it would be hard to find
> a replacement) should be able to handle 7 6551-s @ 115200 at the same
> time... or maybe it was too much for it (when we think about all the
> possible overhead). I am wondering if anyone ever looked into the code
> that runs on the card's CPU.

Afaik the replacement driver (on Aminet) is a complete rewrite on both
the 68k and 6502 sides.

The afaik 6502 runs slower when the 68k accesses the shared memory.


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Received on 2018-09-08 10:00:04

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