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Anyone have Lomas S-100 systems? [message #117201] Mon, 23 September 2013 16:03
tsc2597 is currently offline  tsc2597
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Registered: May 2013
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Message-ID: <1010003@acf4.UUCP>
Date: Sun, 24-Feb-85 11:32:00 EST
Article-I.D.: acf4.1010003
Posted: Sun Feb 24 11:32:00 1985
Date-Received: Thu, 28-Feb-85 01:14:01 EST
Organization: New York University
Lines: 30

---ddt

    I own a S-100 based micro with boards from Lomas Data Products. Does
anyone else out in netland have a similiar machine. If so, I would like to
discuss various upgrade options with them. For those unfamiliar with LDP,
they are a competitor of Compupro. They sell S-100 boards and systems such
as 10Mhz 8086 boards, 80286 boards, 3Mb dynamic ram boards etc and they
support CPM/86, MSDOS 2.1 and Concurrent PC-DOS (hopefully UNIX soon).

   Recently, they came out with a 3 Mb dynamic ram board which works with a 
10Mhz 8086 with no wait states. More interestingly, they have a S-100 board
which emulates the video display of an IBM PC. It seems to be quite
compatible to the point where they have an IBM PC keyboard interface on the
display board. According to Rich Lomas, they have developed a version of
MS-DOS 2.1 which runs PC-DOS programs. Amongst the ones they tried are
dBaseII and Lotus 1-2-3 with graphics. Does any one know if Compupro came
out with theirs and how compatible it is.

   I have had my system for 2 years and have been quite satisfied with their
support. Upgrading this system is cheap - a 10Mb hard disk with controller
and PS was only $900. Now for $500, I can get PC compatibility (I have 2 8"
and 1 5 1/4" drive) through the graphics board (and retire my faithful 5
year old H-19). I have quite a lot of public domain stuff configured for my
system and will be willing to share it.

I have no connection with LDP other than being a customer.

                                            Sam Chin
                                            ARPAnet: tsc2597@nyu-acf4
                                            uucp: allegra!cmcl2!acf4!tsc2597
Re: Anyone have Lomas S-100 systems? [message #117203 is a reply to message #117201] Mon, 23 September 2013 16:03 Go to previous message
jchapman is currently offline  jchapman
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Message-ID: <1379@watcgl.UUCP>
Date: Wed, 27-Feb-85 13:09:27 EST
Article-I.D.: watcgl.1379
Posted: Wed Feb 27 13:09:27 1985
Date-Received: Fri, 1-Mar-85 05:04:17 EST
References: <1010003@acf4.UUCP> --
Organization: U of Waterloo, Ontario
Lines: 32

(extract)
 >  they are a competitor of Compupro. They sell S-100 boards and systems such
 >  as 10Mhz 8086 boards, 80286 boards, 3Mb dynamic ram boards etc and they
 >  support CPM/86, MSDOS 2.1 and Concurrent PC-DOS (hopefully UNIX soon).
 >  
 >     Recently, they came out with a 3 Mb dynamic ram board which works with a 
 >  10Mhz 8086 with no wait states. More interestingly, they have a S-100 board
 >                                              Sam Chin

 I have seen this board advertised but I think people should be wary about
 rushing out and buying one even though they seem like a good deal.  Last
 august I decided to add more memory to my machine and their 128k/256k
 dynamic memory board seemed like a good deal too.  However having had
 previous (bad) experiences with dynamic boards for s100 machines I was
 wary. I have a Morrow hard disk controller which does dma so I called them
 up and specifically asked - Will this board function correctly with the
 Morrow HDC-DMA (just about as close to an exact quote as I can do)?
 Answer: YES. Reality: NO.  I did not discover this immediately since
 all my other memory was static and it was not until I ran in a
  configuration where the Lomas board was being used as the target of
 the disk transfer that failure occurred.  By this time the warranty had
 expired so I just sighed and went out and bought another static ram 
 board (sound of toilet flushing).  Even now I am tempted by both the
 price of their new board and the claims about it but dynamic just
 doesn't seem to work in a generic s100/IEEE696 environment.  If
 anyone has had better experiences with dynamic memeory I would be
 pleased to know.  All the boards I know of either don't do dma
 properly or are restictricted to particular cpu, etc etc.
 
     John Chapman
 
 Once warned, twice shy, but still optimistic.
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