Quarterdeck QRAM only did that with NEAT or LEAP chip sets from Chips &
Technologies, by using the shadow RAM mapping, and required 1MB on the
motherboard, not 640K. I didn't think that was a significant enough
market share to mention.
It would also work with a LIM 4.0 EMS board as I mentioned earlier.
Kai
> ----------
> From: Marvin
> Reply To: classiccmp(a)u.washington.edu
> Sent: Friday, August 08, 1997 1:50 PM
> To: Discussion re-collecting of classic computers
> Subject: Re: XT COMPUTERS
>
> Kai Kaltenbach wrote:
>
> > On a 286, you could use various LIM 4.0 compliant expanded
> > memory boards
> > (e.g. Intel AboveBoard Plus) or a wacky device called an
> > ALL Charge
> > Card, along with special software to map memory into the
> > location.
>
> Quarterdeck also had a program that would expand available
> memory on a 286 above 640K called QRAM. I used to have it
> many moons ago, but got rid of it when I was cleaning
> house. Somehow, it also would map memory into the A000-AFFF
> on a mono card, but would also make more memory available
> even with the EGA card. Can't remember how though.
>
Well as much as I hate to do it, this will be my last message to
this group for a while. Up until the first of the year, I'll be on the road
anywhere from 10 to 30+ days at a time, and this group generates far too
many messages for me to allow it to build up between retrievals! For those
of you that I deal with quite a bit, as well as those who might find info
that may be of interest to me and wish to send it, my email address below
will still be valid. I've gotten a lot out of this group, so keep up the
good work!
Jeff jeffh(a)unix.aardvarkol.com
----------------------------------------------------------------------------
-----
Amiga enthusiast and collector of early, classic microcomputers
http://www.geocities.com/siliconvalley/lakes/6757
A guy sent me e-mail soliciting some old computer stuff to sell. Here's
what he told me he has:
Lots of DEC stuff:
PDP-11/70s
MicroVax(en)
Tape Drives, etc.
Parts, etc.
A couple Intel development computers. Didn't go too much into detail
about these other than the fact that they have dual 8" drives. Sounds neat.
This guy is Rob Campbell. He is in Detroit, Michigan. His number is
(248) 583-9000. Call him, talk to him. Sounds like a reasonable guy.
Sam
-------------------------------------------------------------------------------
Computer Historian, Programmer, Musician, Philosopher, Athlete, Writer, Jackass
I dropped in the 11/23+ CPU and everything worked fine, except that my
EDSI harddisk has bought the big one...
According to ROM diags, I have EIS and FIS for CPU options and 1024Kwords
RAM. I plugged in my Infinite Loop and it ran. The one-instruction
infinite loop doesn't work, at 1000 it jumps to 1006 (JMP (PC)).
And the RX02 responds NO DISK, which is correct. Now all I need to do is
go find an operating system!
Does anyone have any programs or etc. that can be dropped in core with
ODT?
Anyone want any EPROMS?
Sam
-------------------------------------------------------------------------------
Computer Historian, Programmer, Musician, Philosopher, Athlete, Writer, Jackass
---------- Forwarded message ----------
Date: Fri, 8 Aug 1997 16:41:53 -0400 (EDT)
From: Mikeooo1(a)aol.com
To: dastar(a)crl.com
Subject: Re: HHC docs
Sam,
Will do.It'll be out to you tomorrow first thing.Incidentally you might
ask that gentleman or any other interested parties for that matter if they
have a need for HHC eproms.I have a little over 5000 of them which I've been
offered a nominal salvage value for and I'll probably unload the whole batch
fairly soon.
Regards,Mike
Paul,
Sent this to the list. as it's generally useful.
<I think I've got an old rx33-but how would I plug it in?
Vs2000? there is a 60-70 pin header that takes a decunique cable the breaks
it down the floppy and mfm hard disks.
MVII can use a PC floppy cable to the first non twist cable. also It can
use PC MFM HD cables to the drive.
<And, what about non-DEC mfm drives-- can the hardware read them, but not VM
dec name COMMON NAME size
RD51 st412 10mb
RD52 quantum q540 ~35mb
RD53 micropolus 1325 ~71mb
RD54 maxtor-2190 ~159mb
RD31 ST225 ~20mb
RD32 St251 ~40mb
This is important to dec software, and booting.
Any other drive with the same number heads, cylinders, and tracks can be
used as it will map to a known(to the rom) drive. Other drives can be used
if the OS knows it and can boot from the known hard drive, floppy or net via
mop boot.
Allison
I got a whole box of interesting boards!
PDP-11 BOARDS:
M7264 - PDP11/03 processor, 4k ram, all 4 chip sockets used. Two of
these.
M8012-YA - Terminators+bootstraps. Two of these.
M8716 - DR11-W DMA INTERFACE, DR11-B IN HEX
M8728 - 64K MOS MEMORY
M8189 - 11/23+ CPU!! This goes in mine! 2 CPUs and an MMU?
PDP-8 BOARDS:
M8310 - Reg control for KK8E
M8300 - Major regs for KK8E
M8350 - Pos. IO bus interface
M8341 - EAE REGISTER CONTROL
M8340 - EAE INSTRUCTION DECODER
M8655 - KL8-J, KL8-KA, QUAD, 110 to 9600 CONT, Two of these.
DEC10 BOARDS:
M8603 - Massbus interface data board
M8521 - CACHE DATA
M8580 - MF20 DUAL TRANSLATOR, Two of these.
M8604 - DX20 MASSBUS INTERFACE CONTROL, HEX
M8571 - LP20 DATA PATH W LA180 CAPABILITY
M8605 - DX20, DATA PATH BUFFER STORAGE
M8743-AF - 1 Meg ECC RAM
M8606 - DX20, DATA PATH FORMATTER
M8607 - DX20, IBM CHANNEL BUS INTERFACE FOR DX20-C
M8558-C - KI MEMORY BUS ADAPTER. Marked "BAD FOR KL10" Doesn't LOOK
bad...
M8723 - ???
M8579 - MF20-M, 256K 11-bit MOS RAM. Fifteen of these!
M8585 - LP20 TRANSLATION RAM. Two of these.
M8586 - LP20 CONTROL.
M8516 - ECL to TTL translator
VAX BOARDS:
These make an 11/785 CPU, I think...
M7459 - TRS, TERMINATOR & SILO, 11/785
M7463 - KA785, CDM, CACHE DATA MATRIX
M7474 - KA785, CLK, CPU CLOCK
M7462 - KA785, CAM, CACHE ADDR MATRIX
M7475 - KA785, JCS, JOINT CONTROL STORE
M7467 - KA785, DEP, CPU DATA PATH "B"
M7472 - KA785, CEH, CONDITION CODES, EXCEPTIONS, HIGH BITS
M7473 - KA785, ICL, (INTERRUPT CONTROL, LOW BITS)
M7476 - KA785, USC, MICRO SEQUENCER CONTROL
M7477 - KA785, CIB, CPU CONSOLE INTERFACE
M7460 - KA785, SBL, SBI CPU LOW BITS INTERFACE
How many more do I need to finish a KA785?
And when I get them, can I drop this in a Unibus or is it a special bus?
Found this in comp.sys.3b1. It could be a pretty good deal if you
are in the NY area. It may not yet quite yet be a classic, but it
should be soon.
--pec
--------------------------------------------------------------------------
Saved From The Dumpster Collection: http://www.crl.com/~pcoad/machines.html
-- forwarded message --
Newsgroups: comp.sys.att,comp.sys.3b1,comp.sys,nonpc
Path: nnrp1.crl.com!news.znet.com!uunet!in5.uu.net!hotmomma!hotmomma!biancx!larry
From: larry(a)biancx.com (Larry Racies)
Subject: 3b2 FS or For Grabs
Message-ID: <EELo6G.85y(a)biancx.com>
Organization: Newsreel Service
Date: Fri, 8 Aug 1997 14:56:40 GMT
Lines: 11
Xref: nnrp1.crl.com comp.sys.att:7992 comp.sys.3b1:8535 comp.sys:574
T&T 3b2-400 in a 310 case
SVR3 installed
Plus 16 AT&T manuals
and a few floppies.
You name it. Located in NY City.
Pick it up and take it away.
Larry
Hi René,
I guess that would be my specialty.
The PC memory map looks like this:
C000 - FFFF - Various open areas depending on the individual machine,
plus the BIOS
B800 - BFFF - Low resolution (CGA or EGA/VGA low res/text) video (if
present)
B000 - B7FF - Monochrome adapter (if present)
A000 - AFFF - High resolution (EGA/VGA) video (if present)
0000 - 9FFF- Base 640K
I think what you mean is you'd like to use the high resolution area from
A000-AFFF to increase base RAM size. The low resolution area is not
contiguous with base RAM so it can't be used to increase base RAM size.
The trick is, there is no RAM in this location that you can use to
increase the base memory. So, you have to put RAM there somehow (no,
video RAM won't work). There are various methods to do this.
On a 386 or above, the virtual memory management allows a 386-up memory
manager such as EMM386, QEMM386, or 386MAX to map memory into that
location.
On a 286, you could use various LIM 4.0 compliant expanded memory boards
(e.g. Intel AboveBoard Plus) or a wacky device called an ALL Charge
Card, along with special software to map memory into the location.
On an 8088, you had to use a special card, which was a very simple
device containing 64K or more of RAM, along with address selection
switches. The card would map RAM into that location, and came with
software to extend apparent DOS RAM.
Kai
> ----------
> From: SSE Technical Support
> Reply To: classiccmp(a)u.washington.edu
> Sent: Friday, August 08, 1997 12:18 AM
> To: Discussion re-collecting of classic computers
> Subject: FW: XT COMPUTERS
>
>
>
> -----Original Message-----
> From: Mr. Self Destruct [SMTP:more@camlaw.rutgers.edu]
> Sent: donderdag 7 augustus 1997 19:26
> To: Rene van der Meer
> Subject: Re: XT COMPUTERS
>
>
> On Wed, 6 Aug 1997, Rene van der Meer wrote:
>
> > Hi my name is René
>
> Hello.
>
> > I am looking for a program that allows me to break the 640kb and
> uses the
> > cga memory address to make 768kb I am not sure if this exists I
> belief so..
>
> I've heard of such programs, but many were machine specific and/or
> flaky.
> I'd recommend asking the fellows at the classic computer mailing list
> at:
> "classiccmp(a)u.washington.edu"
>
> > it is for a KAYPRO XL
> > my direst computer that I ever had...
> > please help me ...
> > my e-mail address is renemeer(a)xs4all.nl
> > I to like old junk
>
> Glad to hear that!
> Les
>
<chats scheduled and publicised. A look at the S-100 would be
<interesting.
being as s100 has been my base of ops for z80(and others) for many years
it would be more interesting to me as well.
Allison
