[Coco] Got a DUMB QUESTION???

[tfadden]

------ Original Message ------
From: "Alex Evans" <varmfskii at gmail.com>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: 6/29/2019 4:46:17 AM
Subject: Re: [Coco] Got a DUMB QUESTION???
I had/have the same experience as you Alex,  two SCSI drives, and no 
printer problems.  Also , I used it without a multipak all powered from 
a PC power supply in a  mini tower case.

Cheers
Tim

>Pretty sure the 4-in-1 was marketed as SCSI (and I know I used a SCI
>hard drive on it). As for the parallel port, I never had any trouble
>using it on a CoCo 3, but my printer was of the same vintage as the
>4-in-1.
>
>On Sat, Jun 29, 2019 at 3:50 AM Gene Heskett <gheskett at shentel.net> wrote:
>>
>>  On Saturday 29 June 2019 03:07:16 Gene Heskett wrote:
>>
>>  > On Saturday 29 June 2019 01:36:04 L. Curtis Boyle wrote:
>>  > > It does NOT require an MPI. It even has a Mini Bus connector inside
>>  > > of it, that Disto sold multiple cards for (the maximum functionality
>>  > > was the 4 in 1 board, which added a hardware serial port, parallel
>>  > > port, SASI hard drive interface, and a real time clock, if I
>>  > > remember correctly).
>>  >
>>  > Thats close, but without the mpi, it (the 4n1 version) will need a 12
>>  > volt wall wart plugged into a jack in its edge as the serial port
>>  > can't get it from the coco3. I never bothered with it as I've an mpi,
>>  > which can supply that voltage.
>>
>>  I should add that on a coco3, because its double clock speed, pretty well
>>  renders the parport worthless unless one wants to design a buffer which
>>  will hold the data true long enough for it to get thru the FCC mandated
>>  input filtering in most printers parallel inputs, which need valid data
>>  and strobe timings in the 2  microsecond territory. At the coco3 clock
>>  speeds you will miss characters about 20% of the time. I don't think
>>  that FCC rule existed at the time Tony designed the 4n1. Since the
>>  Canadian DOC usually followed the US in things like that, but with a few
>>  months delay, Tony didn't try to please with that design.
>>
>>  What may have worked but I never got around to trying it, might have been
>>  to halt the cpu when the strobe went true with the e-clock, and cancel
>>  the halt with the printers ack. But I didn't follow up and see how that
>>  would have affected os9. I don't believe any of the halts would have
>>  affected dram refresh long enough to matter.
>>  >
>>  > > L. Curtis Boyle
>>  > > curtisboyle at sasktel.net
>>  > >
>>  > > > On Jun 28, 2019, at 11:13 PM, Joe Schutts via Coco
>>  > > > <coco at maltedmedia.com> wrote:
>>  > > >
>>  > > > Hi Everyone,
>>  > > > I (THINK - BUT I'M NOT SURE YET - BUT I'M HOPING) that I just
>>  > > > bought a Disto II Super Controller for the CoCo (on E-Bay - sorry
>>  > > > guys)... My question is, WILL THIS CONTROLLER work on a CoCo III
>>  > > > WITHOUT an MPI Interface OR does it require it???
>>  > > >
>>  > > > Thanks guys...
>>  > > >
>>  > > >
>>  > > > --
>>  > > > Coco mailing list
>>  > > > Coco at maltedmedia.com
>>  > > > https://pairlist5.pair.net/mailman/listinfo/coco
>>  >
>>  > Cheers, Gene Heskett
>>  > --
>>  > "There are four boxes to be used in defense of liberty:
>>  >  soap, ballot, jury, and ammo. Please use in that order."
>>  > -Ed Howdershelt (Author)
>>  > If we desire respect for the law, we must first make the law
>>  > respectable. - Louis D. Brandeis
>>  > Genes Web page <http://geneslinuxbox.net:6309/gene>
>>
>>
>>  Cheers, Gene Heskett
>>  --
>>  "There are four boxes to be used in defense of liberty:
>>   soap, ballot, jury, and ammo. Please use in that order."
>>  -Ed Howdershelt (Author)
>>  If we desire respect for the law, we must first make the law respectable.
>>   - Louis D. Brandeis
>>  Genes Web page <http://geneslinuxbox.net:6309/gene>
>>
>>  --
>>  Coco mailing list
>>  Coco at maltedmedia.com
>>  https://pairlist5.pair.net/mailman/listinfo/coco
>
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