> This is two years late, but the terminal the original poster describes
> sounds like an IST (model 1), a CRT-based CDC product, vintage about 1978.
> There was a later edition called the IST-II, also CDC. It had two 8" drives
> and a Z-80 CPU, as well as connectivity to CDC PLATO mainframe systems,
> either by dialup modem (1200 bps) or multiplexer.
Actually, I was the original poster; a reply to me mentioned the
terminal you're describing.
> The IST is not the oldest PLATO terminal, but it is the oldest that CDC
> manufactured, I suspect. Even my PLATO IV (Magnavox, 1971) is not the
> oldest, but only the first mass-produced machine. The earliest ones date to
> about 1961 and there are probably only two or three still in existence, if
> we're lucky enough to have that many. A precursor to these would be Norman
> Crowder's Auto-Tutor, vintage about 1958, which has characteristics very
> similar to the PLATO terminals (though it is not a computer terminal, it
> operates on filmstrip media), and PLATO's mechanisms are said to have been
> influenced by this machine.
It's one of the mid-70s Magnavox plasma displays I'm looking for...
Say, are you able to connect to NovaNET with the magnavox terminal? if
so, we should meet for a game of Empire or Avatar some time (although
I'm sure you'll wipe me out).... or maybe a more civilized game of chess...
Regards,
-doug quebbeman
> > > Does anyone here still use their old (say pre-1990) Macintosh
> as a
> > > regularpractice?
> >
> >
> > I've got a couple of 128's that act as shelf supports for some
> of my
> > Commodore equipment - so I guess you could say that they are
> "still in
> > use" :-)
>
> When I first read that, I read the '128' as 'C128' and wondered
> how on
> earth a Commodore 128 could be used to support anything...
>
> -tony
>
Good god no! The Commodore 128's are far more useful than the early
Macs!
cheers,
Lance
----------------
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Sellam asked:
>Does anyone here still use their old (say pre-1990) Macintosh as a regular
>practice?
Sorta. Every year me and a bunch of buddies get together to play computer
network games. "Spaceward Ho" started the tradition, so we always play it
as a point of ceremony, and my Mac Plus is always on the net and playing. I
actually won with it last year.
Likewise, I have the same machine set up so that the 2-year-old can play
"Babysmash", the 6-year-old can play a Maze game, and the 9-year-old can
use "Concertware", but those have not been very heavily used, just novelty
value so far.
Does that count?
- Mark
Hi Sellam,
>
> Does anyone here still use their old (say pre-1990) Macintosh as a
> regularpractice?
I've got a couple of 128's that act as shelf supports for some of my
Commodore equipment - so I guess you could say that they are "still in
use" :-)
Lance
----------------
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Oh I don't know, hearing about an 11/70 being thrown out doesn't bother me
too much.. I think its much worse that the guy who formerly owned my
Honeywell threw away 4 hard disks, 6 tape drives, all the manuals, and all
the software, a whole month before I called him... At least 11/70 manuals
and SW aren't made of unobtainium, at least not compared to DPS-6 stuff.. Or
the people I know who my dad wouldn't call until I cleaned up the house that
in the meantime figured I wasn't interested and threw out their Primes... :
(
Will J
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Hi
I did some searches. First I found a company
that is listed as having DTL devices form one of those
master list of companies:
http://www.mathiselectronics.com/
The only thing is that they do not list them on their
web page.
A little nore in depth search ( remembering that I might
have actually posted information to this group in the past )
revealed:
http://lansdale.com/homeprod.htm
Of course, I was wrong, they were in Arizona and not Texas
( it was the desert that fooled me ). They have quite a
listing of DTL parts in the Motorola section. If anyone
does contact them for prices, could they let me know?
I see they have a minimum $1000 order.
Dwight
>From: "Dwight K. Elvey" <dwightk.elvey(a)amd.com>
>
>Hi
> By the way, there is a company in Texas some place that
>is actually making DTL and most likely RTL as well. They
>make parts for obsolete equipment. I've lost the url
>but I found it with a search on the web. I was always
>afraid to even ask what they were charging for the
>parts ( most were mil spec as well ).
>Dwight
>
>
>>From: "Arlen Michaels" <arlen(a)acm.org>
>>
>>on 31/7/02 3:12 PM, Ethan Dicks at erd_6502(a)yahoo.com wrote:
>>
>>> I am looking for some DTL chips to make a repro W706/W707 TTY
>>> interface set for my Straight-8 and PDP-8/S (got *no* serial
>>> I/O for them. :-( )
>>>
>>> http://www.pdp8.net/w-boards/pics/w706.shtml?small
>>> http://www.pdp8.net/w-boards/pics/w707.shtml?small
>>>
>>> The chips there are:
>>>
>>> W707
>>> MC799 Dual Power Buffer (1)
>>> MC790 Dual J-K Flip-Flop (8)
>>> MC724 Quad Input Gate (5)
>>> MC789 Hex Inverter (5)
>>> W706
>>> MC790 Dual J-K Flip-Flop (9)
>>> MC789 Hex Inverter (6)
>>> MC724 Quad Input Gate (5)
>>> MC799 Dual Power Buffer (1)
>>
>>The MC7xx were RTL, not DTL. Motorola made them. They typically used a
>3.6
>>volt power supply, like the Fairchild uL9xx RTL series of the same era
>(late
>>'60s I think).
>>
>>Arlen Michaels
>>
>>
>
>
>
Yes, they are 80x24. I plan to scan one of them for netposterity. :)
Will post link when I get it done.
Anyone know where the genesis of 80x24/40x24 screen dimensions (and quite
a few other devices) has its origination in? I remember my old dot matrix
epson used to be 80 columns wide, and most of the older 8 bit computers
had 40 or 80 cols by 24 or 25 rows. "But why?" he cried...
Regards,
Louis
From: "Richard Erlacher" <edick(a)idcomm.com>
To: <cctalk(a)classiccmp.org>
Subject: Re: Fortran Coding Form Pads...
Date: Sat, 27 Jul 2002 21:45:07 -0600
Organization: Erlacher Associates
Reply-To: cctalk(a)classiccmp.org
Are these the ones with 24 lines of 80 columns? Several major vendors
modeled their coding forms after the U.S. military coding forms,
presumably cooked up by the Navy. I've only seen the blue ones, (blue
lines) which I presume were patterned after the USAF ones. They worked
great for coding when the work product was going to that huge room full of
mini-skirted (back then) keypunch operators. (I'd have given a week's
pay for a couple of hours hours to fish around in that room ... <sigh> ...
)
I did, BTW, code in Fortran back then.
Dick
Hello, all:
I have another C issue that I can't seem to see the answer for, so I
thought I'd throw it out to the masses.
I'm deep into the Altair 680b emulation project (base code done,
working on telnet access) and I'm experiencing problems reading a file
stream into the memory array. Here's snippets of the code:
<SNIP>
byte *ppmem ; // pointer into memory array
byte ucMem[3*65536] ; // actual memory-see defines below for usage
// roms[] is an array of structures defining start-time loaded ROMs. Only
one ROM now
//(the monitor PROM), but flexible enough to allow bank-switched ROMs (not
applicable
//in the 680b but a leftover from the 6800 processor emulation code that was
borrowed
//for the project)
//
//MEM_xxx are defines for the offset into the ucMem array to various areas
#define MEM_RAM 0
#define MEM_ROM 0x10000
#define MEM_FLAGS 0x20000
FILE *pFH ;
// open file, etc.
//create while loop to walk through roms[] array
// Read ROM directly to memory. This works.
ppmem = &ucMem[roms[i].iROMStart + MEM_ROM] ;
fread(ppmem, sizeof(byte), roms[i].iROMLen, pFH) ;
//this doesn't work...
//fread(&ucMem[roms[i].iROMStart + MEM_ROM], sizeof(byte), roms[i].iROMLen,
pFH) ;
//...nor does this
//fread((char *)ucMem[roms[i].iROMStart + MEM_ROM], sizeof(byte),
roms[i].iROMLen, pFH) ;
// Set flags for ROM
memset(&ucMem[roms[i].iROMStart + MEM_FLAGS], 1, roms[i].iROMLen) ;
</SNIP>
So here's where I'm missing it. Under all three fread scenarios, the
compiler doesn't throw a warning...they all compile cleanly. But only the
first works.
This sounds like one of those "What's the Bug" ads from DDJ. What am
I missing?
Rich
Erik:
No errors or warnings are emitted by the compiler, so the way I'm
determining that the various functions work or not work is by looking at a
"core dump" of the emulator memory (performed by another routine). In all
but the first example, the memory is empty (they remain the initialized
value of 0). The first way, the emulator memory indeed shows the contents of
the loaded ROM.
I've "watched" the contents of the roms array and have also
outputted the values to the debug screen. The values are as expected.
Rich
-----Original Message-----
From: Eric J. Korpela [mailto:korpela@ssl.berkeley.edu]
Sent: Thursday, August 01, 2002 12:34 PM
To: cctech(a)classiccmp.org
Subject: Re: C question
> // Read ROM directly to memory. This works.
> ppmem = &ucMem[roms[i].iROMStart + MEM_ROM] ;
> fread(ppmem, sizeof(byte), roms[i].iROMLen, pFH) ;
>
> //this doesn't work...
> //fread(&ucMem[roms[i].iROMStart + MEM_ROM], sizeof(byte),
roms[i].iROMLen,
> pFH) ;
>
> //...nor does this
> //fread((char *)ucMem[roms[i].iROMStart + MEM_ROM], sizeof(byte),
> roms[i].iROMLen, pFH) ;
>
> So here's where I'm missing it. Under all three fread scenarios, the
> compiler doesn't throw a warning...they all compile cleanly. But only the
> first works.
Lack of warnings or code don't have anything to do with whether the code
is correct...
The last one is the easiest to figure out....
Call fread with the following parameters:
1. byte value at address (ucMem+roms[i].iROMStart+MEM_ROM) converted into
a pointer to type char.
2. The value 1 (assuming byte is typedefed to "unsigned char")
3. The value stored in roms[i].iROMLen
4. The value stored in pFH.
It's fairly easy to see why the first parameter is wrong... No warning is
issued because the type of the first parameter is correct. Without the
typecast, a warning should be issued.
The previous two look equivalent to me. I don't really see a significant
difference. Are you sure "i" and "roms" are set to what you think it should
be.
Personally, I would have written the first parameter as
"ucMem+roms[i].iROMStart+MEM_ROM" as I think it more clearly represents
what you mean.
What is the error reported? What are the return values from fread? (You
should be checking that the return value equals roms[i].iROMLen.)
Eric
On Thu, Aug 1, 2002 6:00 pm, "Tom Owad" <owad(a)applefritter.com>wrote:
>I've got a couple of 128's that act as shelf supports for some of my
>Commodore equipment - so I guess you could say that they are "still in
>use" :-)
Hi all. I have just subscribed. I have the following equipment. BBC Micro.
32k, Apple II+ 48k, Apple IIc, Macintosh Classic 4/80, Amiga A500,
Macintosh LC II with Apple IIe card, Macintosh iMac Bondi Blue.
Of all these only the iMac is in regular use. The LC II is sitting on the
floor beside me. It is semi in use. Or rather it is ready for use to
connect to the Internet should the iMac need to be sent for service (this
has happened twice since I have had it). The other computers are all in the
cupboard under the stairs. All are in working order, or were in working
order.
Projects I have done are:
1. Connected the Apple II to the BBC Micro using the games socket on the
Apple and transfered data successfully. (hard)
2. Connected the BBC Micro to the Amiga and transferred data to a BBC
Micro emulator program which runs on the Amiga.
3. Downloaded disk images off the Internet using the Mac Classic and
transferred them to the Apple IIc using Mac ADT.
3. Connected the Apple II to the Amiga using serial card without
instructions. Card is marked 7710A (hard)
4. Transferred data to the iMac from the LC II via the Internet.
5. Connected the LCII to the internet. (Easy)
a) browsed the internet with Mac web (slow)
b) used Eudora for email
c) Claris emailer seems better
6. Connected the Mac Classic to the Internet using S7.1 and S7.5.5
7. Printed on Epson Stylus Color 740 from LC II. (Easy, send disk images
of 68k version of printer driver which is on Bondi iMac's install CD).
8 Connected to Lost Gonzo using Cyberdog. Any telnet client will do. Is
here:
telnet://lost-gonzo.com
Projects I have not been able to do.
1. Connect any Macintosh running System 6 to the internet
2. Connect a 5.25 Disk II drive to the LC II card
http://home.swbell.net/rubywand/Csa2FDRIVE.html
