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Path: utzoo!watmath!clyde!akgua!mcnc!decvax!wivax!dyer
From: dyer@wivax.UUCP (Stephen Dyer)
Newsgroups: net.micro.6809
Subject: Re: Coco Deluxe RS-232 Pak
Message-ID: <19250@wivax.UUCP>
Date: Sun, 4-Mar-84 10:50:12 EST
Article-I.D.: wivax.19250
Posted: Sun Mar  4 10:50:12 1984
Date-Received: Mon, 5-Mar-84 01:16:55 EST
References: <1942@ihnss.UUCP>
Organization: Wang Institute, Tyngsboro, Ma.  01879
Lines: 25

The "Deluxe RS232 Pak" does support cursor controls, the same ones as
in the Videotex cartridge.  That is, it's sort of a VT52 with only
16 lines by 32 characters.  I have a Videotex termcap entry (created
when my H19 was dead and all I had was Videotex) if you want it.

All in all, I think it's really a crock.  The program is VERY limited,
especially as regards concurrent connection of a printer--600 baud only,
and no automatic XON/XOFF to the host when the printer is busy.
Unless you have a fast printer, connecting to the host at 1200 baud
with the printer running will lose characters.  Nice defaults
on power-up, too (HALF-duplex?!?)  Would that they had added a second
RS232 UART instead of this useless terminal ROM.

As far as using this with OS9, well it's not clear how you can do it.
The Multi-Pak and cartridge ports only support NMI and CART (FIRQ thru
a PIA)--no IRQ.  I have received conflicting info about what this Pak uses.
I wrote to R/S product support and they said NMI, but a quick disassembly
of the Pak indicated that it now uses CART.  Problem is that in the
Multi-Pak interface, only the "selected slot" passes CART to the CPU.
I would be interested to hear what your friend has done.  Clock polling
is possible, too, but I fear that this would only allow rates up to
600 baud (someone tell me I'm wrong, here, please.)

/Steve Dyer
decvax!bbncca!sdyer