Does anyone happen to have a listing of what the switch/jumper settings
for a DEC M7506-BC (aka MSV11-MB) are? I've got one that I'd like to
check is set correctly before I try to use it...
Thanks,
Pat
--
Purdue University ITAP/RCAC --- http://www.rcac.purdue.edu/
The Computer Refuge --- http://computer-refuge.org
> Are there any online archive(s) of the
> original Dr. Dobbs journals?
The first twelve years of DDJ (1976-1987)
were reprinted in bound volumes. From
1988 on, DDJ has published back issues
on CD-ROM. Unless someone has scanned
and maybe OCR'd some articles, as I have
with some 6502 and Apple II items, then
no. I do have a spare volume 1 if you
need it. If I can get volumes 9-12 then
I can get rid of the individual issues
>from 1984-1987.
My Simtel CD-ROM has DDJ source code
>from 1986 through early 1994.
--
Paul R. Santa-Maria
Monroe, Michigan USA
Looking for an old PowerPC based Mac laptop, anything
really with a colour screen - eg around the 100MHz
mark.
Wanted for a conversion project. Based in the Bay
Area.
Thanks
Ian.
__________________________________________
Yahoo! DSL ? Something to write home about.
Just $16.99/mo. or less.
dsl.yahoo.com
I have an old HP 7596A that I still use for my work. There are a few things that I'm curious as to whether they can be changed, but I'll ask one question at a time.
The plot limit on this model (E size?) is 36 inches wide x 48 inches long. I'm interested in doing a longer plot, say 5 or 6 feet. I have some manuals I bought on a CD, I've been snooping around on them.
The hard clip is the physical limits of the plotter, the soft clip is the software limits of the plot. In the pocket guide, there is a place where it says:
PS, page size
Use: Changes the size of the hard clip limits
Syntax: PS length(,width); or PS;
Could I hire a computer expert to change the length setting? Or even do it myself? Maybe a long shot, considering computers are not the subject I've spent much of the last 20 years studying. Any technical answers should be s-l-o-w-e-d down from your usual warp speed to biplane or maybe hang glider :)
Thanks for any help.
>Date: Tue, 29 Nov 2005 22:15:25 -0800 (PST)
>From: Fred Cisin <cisin at xenosoft.com>
>Subject: RE: "Market" for old macs?
>> >I'd LOVE to hear from anybody who is successfully formatting and writing
>> >GCR with a PC (without adding in a "flux transition" based additional disk
>> >controller (such as Catweasel or COPYII Option Board)
>> >It is "impossible". (VERY difficult)
>
>On Tue, 29 Nov 2005, Chuck Guzis wrote:
>> The bigger problem isn't that it's GCR, but rather that it's also variable
>> rate GCR. I'd remove the quotes from "impossible" on this one, although,
>> maybe with a razor blade and a magnet and a VERY steady hand...
>
>How fast can you turn the MOTOR ON line on and off? :-)
The Outbound Laptop Model 125 (ca. 1989 Mac laptop clone) uses a
Citizen brand PC type laptop floppy drive. It reads and writes 800K
Mac floppies as well as 1.4 MB floppies on both platforms. However,
it has a controller card on the end of the floppy drive.
The main components of the floppy controller card are an 85C30,
WD37C65, WD92C32 (confused as to why this is there, since the 37C65
has a data separater built in), an LS624 voltage controlled
oscillator, a Xicor X9103 digital potentiometer, a 27C256, and a
GAL16V8. There's a little bit of other standard 74 series logic on
board as well.
My main obstacles to cloning the thing is an affordable source of the
WD92C32 and the time and method to extract the logic of the GAL.
I find it interesting that back in 1989 someone had already found a
way to make a PC floppy work as a Mac floppy, though with a double
handful of chips.
I'm not quite sure what kind of interface the Outbound uses to the
floppy drive, though. Obviously, there's no SWIM chip in the
Outbound. So did the original designer (Doug Swartz?) cobble up a
SWIM from 74 series logic or does the controller on the floppy negate
the need for the SWIM?
The thing that particularly arouses my curiosity is that the Laptop
125 has no SCSI port, nor external floppy port. But it has a Hirose
brand DX10-28 connector (looks a lot like a mini-centronics). That
connector can interface to an external floppy or external SCSI
controller. The interface point for the external floppy is the
85C30. The interface point for the SCSI controller is a 53C80. So
I wonder what the Outbound is using for signals on that 28 pin
connector that will work for both of those interfaces and make some
kind of sense to the Mac guts at the other end.
Jeff Walther
> James Fogg wrote:
> > My interests stop at the "classic" Macs, of which the SE30 is the
> > height of engineering achievement (in my opinion).
>
> Why? I know a bit of the classic Mac engineering history
> thanks to Andy's retro website/book, but I know nothing of the SE30.
OK, neither do I (it's too late to argue). It is the last of the classic
Macs and has the greatest number of features and capabilities.
Okay, I pulled the power supply on the VT100 after replacing the two video
board components, only to find 3 resistors on the PSU burned out. I know I
should probably get a book on how to read a schematic (I will soon) but in
the meantime can someone tell me what these resistors are?
http://home.earthlink.net/~fireflyst/images/burnedpsu.gif
I copied a portion of the diagram image on page 23 of the VT100 found at:
http://vt100.net/mirror/antonio/mp00633.pdf
If someone could tell me what resistor is what, that would be awesome.
Thanks again for everyone's help (and time)
Julian
Ah yes, now I remember ... indeed it was even 3 power supply voltages,
like the old 4116 DRAMs.
Thanks Tony, a few failing memory bits are corrected :-)
- Henk, PA8PDP.
________________________________
Van: cctalk-bounces at classiccmp.org namens Tony Duell
Verzonden: za 03-12-2005 22:46
Aan: cctalk at classiccmp.org
Onderwerp: Re: EPROM Substitution
>
> I vaguely remember that all 2532 and 2732 EPROMs were compatible *except* t=
> he TI one.
> (or was it an other manufacturer?)
> >From that one manufacturer the 2532 used a *second* power supply ... was it=
> -5V?
You're thinking of the 2K byte (16K bit) EPROMs. Everybody but TI made a
2716 that was single-rail (+5V supply only). TI's 2716 was a 3-rail part
(+5V, +12V, -5V), the TI 2516 was single-rail part and much the same as
everyone else's 2716.
-tony
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