🚀 go-pugleaf

Rainbow EchoMail Digest                         Oct  6, 1990

In this issue:
  RE: EXTENDED MEMORY ON A       (2 messages)
  RE: RD-53
  QUANTUM DRIVES ON RBOW
  LA50 TO AT SERIAL PORT


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Date:     10-04-90 (02:05)
To:       PAUL OLSON
Subject:  RE: EXTENDED MEMORY ON A
From:     CARL HOUSEMAN

If you can give a page number & manual reference (I hope you're talking
about the original CPM 86/80 doc set as shipped in 1985!), I'd
be curious to see just how DEC managed to goof up a discussion
of memory addressing in the Rainbow.

 Of course, as you note, the *Rainbow* is limited to 896Kb, but the 8088
with 20 address lines reaches to 1 mb.  The Z80 with 16 address
lines gets another 64K, just be complete!


- --- Opus-CBCS 1.12
 * Origin: Silver Bullet - Silver Spring, Md - 301-622-2247 (1:109/417.0)
------------------------------
Date:     10-04-90 (07:13)
To:       CARL HOUSEMAN
Subject:  RE: EXTENDED MEMORY ON A
From:     PAUL OLSON

Carl,

Yes, that's the set I'm talking about.  The only time DEC is mentioned
in the manuals is in the opening credits.  Otherwise it is all
DR. It wouldn't suprise me that they screwed up.  I haven't
ever had to push the entire memory in any of my programs, so it
never became an issue. ;-)

Thanks for keeping everyone informed, including me!  Even an old Rainbow
dog can learn a few tricks, or information!

As Always,
Paul


- --- Opus-CBCS 1.12
 * Origin: Silver Bullet - Silver Spring, Md - 301-622-2247 (1:109/417.0)
------------------------------
Date:     10-04-90 (19:59)
To:       CHRIS RYAN
Subject:  RE: RD-53
From:     FRANK MALLORY

 CR>        Recently, a formerly active Rainbow user offered me a RD-53
 CR> for a reasonable price (not the issue).  In the conversation he made a
 CR> comment that intrigues me.  He stated that there is an UNDOCUMENTED
 CR> feature in FORD-DOS <sic> (otherwise referred to as 3.xx), that allows
 CR> a user to format an RD-53 with 3 partitions.  His meaning was that the
 CR> first 2 partitions were 32Meg, with the third one being the remainder
 CR> of the disk space.
 CR>        This seems to be counter to Suitable's (Jerry Miller) list
 CR> published
 CR> in Rainbow News.  Since Suitable did the upgrade of FORD-DOS into the
 CR> releaseable 3.10A, I would have thought that this would become
 CR> documented,

Good luck; let me know if you succeed.  I have mine set up as 2 32MB
DOS  partitions.  I tried at the time to squeeze more out of
it, but wasn't able to.


- --- msged 1.99L MSC
 * Origin: Silver Bullet - Silver Spring, Md. - 301-622-2247 (1:109/417)
------------------------------
Date:     10-04-90 (15:50)
To:       ALL
Subject:  QUANTUM DRIVES ON RBOW
From:     MARC MCCUNE

Does any have any knowledge of using a Quantum 10 or 40 meg hard drive
on a rainbow?

I entered this questions earlier, but received no response. (or I missed it).

Actually, if anyone knows any-and-all hard drives are workable with the
rainbow, the information would be appreciated.

$ SET THANKS/IN_ADVANCE

- ------------/
           /Marc McCune


- --- Opus-CBCS 1.13
 * Origin: VAXCat, Merrimack, NH; Home of the Black VAXCat;  (1:132/777.0)
------------------------------
Date:     10-05-90 (07:01)
To:       GEORGE THEALL
Subject:  LA50 TO AT SERIAL PORT
From:     DON MARQUART


 > From: dimacs.rutgers.edu!srm@seismo.css.gov  (Scott R. Myers) Organization:
 > Rutgers University
 >
 > I've posted this before and only received one response which was not very
 > specific but appreciated.  Can anyone tell me the proper pinouts for a DEC
 > LA50 serial printer to an IBM AT 9 Pin serial port.  Any response would be
 > appreciated...  Thanx...

Scott, here are the connections for a IBM PC to DEC LA series printers as
shown in one of the RS-232 connection references:

                Computer          Printer
                --------          -------
                   1                 1
                   2                 3
                   3                 2
                   4                 8
                  5&6                19
                   7                 7
                   8                4&5
                   20                6

Have not had a chance to test this cable here but this book has been
very accurate in the past.  Note, this is for the original DB25
connector as used
on the PC.

Hope this helps...


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