Re: HP 9816 CP/M-68K

On Mon, Feb 12, 2018 at 1:23 PM, Fred Cisin via cctalk < cctalk@classiccmp.org> wrote: > Reading or writing multiple sized sectors can be done with multiple passes. > But, I don't know how to FORMAT a track with multiple sector sizes with > NEC 765 type controller. Not as hard with WD style

Re: Intel 8085 - interview?

On Fri, Feb 9, 2018 at 3:41 PM, Chuck Guzis via cctalk < cctalk@classiccmp.org> wrote: > The V-series may be a good example of why Intel didn't want to publicize > the added 8085 instructions. > Maybe. What I'd heard from multiple sources was that they only wanted the 8085 to replace the 8080,

Re: Intel 8085 - interview?

On Thu, Feb 8, 2018 at 9:56 PM, Chuck Guzis via cctalk < cctalk@classiccmp.org> wrote: > On 02/08/2018 07:18 PM, Eric Smith via cctalk wrote: > > At some point I read an article or a transcript of an interview with an > > Intel employee (or former employee) who had been inv

Intel 8085 - interview?

At some point I read an article or a transcript of an interview with an Intel employee (or former employee) who had been involved with the design of the 8085, describing how he had specified additional instructions over those of the 8080, and they had been implemented in the silicon, but then the

Re: [RESOLVED] Re: EPROM baking

On Mon, Feb 5, 2018 at 12:06 PM, Chuck Guzis via cctalk < cctalk@classiccmp.org> wrote: > You should be aware that many "thin" Far East USB cables will not pass > the full USB 1.5A current without substantial voltage drop. > "Full USB current" is only 0.5A for USB 2, and 0.9A for USB 3. Any USB

Re: IBM 9331-011 8" External Floppy Drive - eBay 183038271095

On Thu, Feb 1, 2018 at 7:04 PM, Chuck Guzis via cctalk < cctalk@classiccmp.org> wrote: > Much to my surprise, a P3 Intel i820 (that's the one with RDRAM) FIC > board not only handles FM, but 128-byte sector MFM. > Well, great, but then what do you do when you want to read and write 80 (decimal)

Re: SuperTerm Maintenance Manual

On Thu, Feb 1, 2018 at 10:56 AM, Paul Koning <paulkon...@comcast.net> wrote: > > On Feb 1, 2018, at 12:51 PM, Eric Smith via cctalk < > cctalk@classiccmp.org> wrote: > > console terminal [...] VT52. (It was not good > > practice to use a CRT as the system conso

Re: SuperTerm Maintenance Manual

On Thu, Feb 1, 2018 at 10:19 AM, Mike Norris via cctalk < cctalk@classiccmp.org> wrote: > The SuperTerm was manufactured by Intertec Data Systems c. 1978, it was a > 180 CPS dot matrix printer (RS232), quite often used as a console printer > in place of a LA36, I know it sounds snarky, and

Re: where to find ZCPR2, ZCPR3, ZCPR33, ZCPR34?

On Wed, Jan 31, 2018 at 1:43 PM, Eric Smith wrote: > > Still looking for ZCPR2 and ZCPR34. > Elsewhere nathanael pointed out to me that ZCPR1, ZCPR2, and ZCPR33 may be found at: http://www.classiccmp.org/cpmarchives/ftp.php?b=cpm/Software/WalnutCD/cpm So, still looking for

Re: where to find ZCPR2, ZCPR3, ZCPR33, ZCPR34?

On Wed, Jan 31, 2018 at 12:46 PM, Eric Smith wrote: > That site has NZ-COM and Z3PLUS, but I've dug through it and cannot find > ZCPR2, ZCPR33, or ZCPR34. It's possible that they are there somewhere and I > just didn't find them. > OK. Found ZCPR33 on that site in the FOG

Re: where to find ZCPR2, ZCPR3, ZCPR33, ZCPR34?

On Tue, Jan 30, 2018 at 9:29 PM, <wrco...@wrcooke.net> wrote: > On January 30, 2018 at 3:21 PM Eric Smith via cctalk wrote: > Now I'm still looking for ZCPR2, ZCPR33, and ZCPR34. > > I believe you will find this site: > > http://www.znode51.de/indexe.htm > > useful.

Re: who is in this picture? (VCF 199x)

On Tue, Jan 30, 2018 at 2:55 PM, Bill Degnan via cctech < cct...@classiccmp.org> wrote: > https://retropopplanet.files.wordpress.com/2011/06/vintage-computer.jpg > Pavl Zachary

Re: Interest Check: Belden Thicknet 10base5 Ethernet Coax

On Tue, Jan 30, 2018 at 4:47 PM, systems_glitch via cctalk < cctalk@classiccmp.org> wrote: > Per the recent discussion on thicknet/early Ethernet, I figured I'd see if > there's any interest in cut-to-length Belden thicknet/10base5 Ethernet > cable. I've got a local surplus guy who's got at least

Re: where to find ZCPR2, ZCPR3, ZCPR33, ZCPR34?

On Tue, Jan 30, 2018 at 1:18 PM, geneb via cctalk wrote: > Eric, take a peek here: > http://www.classiccmp.org/cpmarchives/ftp.php?b=cpm/Software > /WalnutCD/zsys/ > Thanks! It does look like that contains the ZCPR3 distribution. Now I'm still looking for ZCPR2, ZCPR33,

Re: where to find ZCPR2, ZCPR3, ZCPR33, ZCPR34?

On Tue, Jan 30, 2018 at 1:10 PM, Chuck Guzis via cctalk < cctalk@classiccmp.org> wrote: > > http://www.classiccmp.org/cpmarchives/ftp.php?b=cpm% > 2Fmirrors%2Foak.oakland.edu%2Fpub%2Fsigm > > Is the SIG/M collection, all 310 volumes of it. > > Does this help? > > > Thanks, but no. That actually

Re: where to find ZCPR2, ZCPR3, ZCPR33, ZCPR34?

On Tue, Jan 30, 2018 at 11:38 AM, Bill Degnan wrote: > https://archive.org/details/LOGIC_AppleII_Disk-CPM014 > > is this what you mean? > While that's useful (thanks!), I'm really looking for the complete ZCPRn distributions, which included source code for the CCP

where to find ZCPR2, ZCPR3, ZCPR33, ZCPR34?

I've become interested in ZCPR2, 3, 33, and 34, and am surprised at how difficult it is to locate them online. Or maybe I'm just an idiot. Are they out there somewhere? It looks like ZCPR3 was on SIG/M volumes 184 to 192, but those specific volumes seem to be missing from the SIG/M archives I can

Re: MY COMPUTER LIKES ME when i speak in BASIC.

My computer likes me when I speak MACRO-10. :-) On Jan 17, 2018 7:28 AM, "Mattis Lind via cctalk" wrote: > I scanned a nice little booklet I found in my fathers stuff. > > "MY COMPUTER LIKES ME when i speak in BASIC" by Bob Albrecht. > >

Re: IP address classes vs CIDR (was Re: Reviving ARPAnet)

On Thu, Jan 18, 2018 at 11:35 AM, Grant Taylor via cctalk < cctalk@classiccmp.org> wrote: > On 01/18/2018 11:00 AM, Eric Smith wrote: > >> Years ago I added a configurable "bozo-arp" feature to the Telebit >> NetBlazer router, which would respond to ARP requests for non-local >> addresses and

IP address classes vs CIDR (was Re: Reviving ARPAnet)

On Thu, Jan 18, 2018 at 10:39 AM, Grant Taylor via cctalk < cctalk@classiccmp.org> wrote: > I was not aware that there was code that supported /only/ Class A (/8) > addresses and /not/ Class B (/16) or Class C (/24) addresses. > > I /thought/ that everything was either classful (as in supports

Re: non-PC Floppy imaging

On Fri, Jan 5, 2018 at 3:45 PM, Dave Wade via cctalk wrote: > IBM invented the 8" floppy disk format. Generally their disks follow the > standard 3740 format. > True for anything you're likely to encounter in the "real world", but in the interest of muddying the waters

Re: Large discs (Was: Spectre & Meltdown

On Jan 4, 2018 22:17, "TeoZ via cctalk" wrote: 100GB M-Discs are dual layer BlueRay media correct (not readable on a DVD player)? I actually have a BDXL BR burner. They are three-layer, and will ONLY work on BDXL drives, not older BD drives.

Re: Dumping my first EPROM

On Tue, Jan 2, 2018 at 12:13 PM, Brad H via cctalk wrote: > Thanks Paul. I found an srec2bin converter and ran that.. it created a 1K > bin file. I then opened that with a hex editor (slick edit).. but alas, no > readable strings. > Not too surprising, since AFAIK the

Re: tumble tiff to pdf converter

On Wed, Dec 20, 2017 at 3:30 AM, Christian Corti via cctalk < cctalk@classiccmp.org> wrote: > Ok, I see, whoever changed tumble as found on github forgot to change all > version numbers, to update the README and many things more :-( > I can't find anywhere in the github repo that the version

Re: Dec-10 Day announcement from Living Computers: Museum + Labs

On Sun, Dec 10, 2017 at 4:19 PM, Noel Chiappa via cctalk < cctalk@classiccmp.org> wrote: > Oh, one detail I didn't look at: what's the physical interface this uses? > Hopefully three of the Berg/DuPont connectors (i.e. what's on the RHxx > boards, with flat cables going to the adapter to the

Re: Ideas for a simple, but somewhat extendable computer bus

On Nov 20, 2017 7:41 AM, "Tapley, Mark via cctalk" wrote: Catching up late, sorry if this is an old question, but what did the Digital Group computers use? My recollection is that they offered cards with 6800, 6502, 8080, and Z-80 CPUs on the same bus, and that

Re: Ideas for a simple, but somewhat extendable computer bus

On Nov 19, 2017 7:18 PM, "allison via cctalk" wrote: The rest is the specific implementation. What happens if the CPU is 1802 or something else that does not match the 6500 or 8080z80 models. There is nothing that prevents either the serial or parallel arbitration

Re: Ideas for a simple, but somewhat extendable computer bus

On Sat, Nov 18, 2017 at 10:48 PM, Jim Brain via cctalk < cctalk@classiccmp.org> wrote: > Looking at the schematic for the ECB, I cannot find any description of the > signals BAI, BAO, IEI, and IEO. Can anyone shed some light on the function > of these signals? > Bus Acknowledge In and Out,

Re: WTB: HP-85 16k RAM Module and HPIB Floppy Drive

Hi Eric, It's not urgent, but when you have a chance, could you dump the 9122C ROM(s) and take high resolution photos of the controller board? Since it does HD, I suspect it probably does not use a 600 RPM mechanism. Thanks! Best regards, Eric On Nov 15, 2017 17:45, "Eric Schlaepfer via

[no subject]

My first FPGA-Elf (2009) used an FPGA board that is long-since obsolete, and while I updated it last year, it used an FPGA board that was not commercially available, and would have been frighteningly expensive if it was. For the most recent RetroChallenge, I updated the FPGA-Elf to work on a

Re: HP 9836U processor mystery...

On Mon, Nov 6, 2017 at 9:59 PM, Tony Duell via cctalk wrote: > Mine identifies the CPU as a 68010 in the power-on diagnostic. But from > what > I remember the PGA socket could also take a 68012 (with extra address pins > brought out). I don't have such a chip, so no idea

Re: Which Dec Emulation is the MOST useful and Versatile?

On Fri, Nov 3, 2017 at 6:07 PM, Paul Koning via cctalk < cctalk@classiccmp.org> wrote: > Could be. Then again, today's main architectures are all decades old; > they get refined but not redone. > I'm not sure whether you consider the 64-bit ARM architecture to be one of "today's main

Otrona Attache disk format?

>From the Otrona Attache Technical Manual, July 1983: "The diskettes Attache uses have fourty-six tracks on the top side and fifty tracks on the bottom side, [...]" Really???

RE: Which Dec Emulation is the MOST useful and Versatile?

On Oct 29, 2017 09:54, "Dave Wade via cctalk" wrote: I am not sure they invented computer emulation. I think that the concept Emulation/Simulation is as old as, or perhaps even older than computing. Whilst it was a pure concept Alan Turing's "Universal Turing Machine" was

Re: Which Dec Emulation is the MOST useful and Versatile?

IBM invented computer emulation and introduced it with System/360 in 1964. They defined it as using special-purpose hardware and/or microcode on a computer to simulate a different computer. Anything you run on your x86 (or ARM, MIPS, SPARC, Alpha, etc) does not meet that definition, and is a

Re: A Mystery

On Tue, Oct 10, 2017 at 6:07 AM, Rod Smallwood via cctalk < cctalk@classiccmp.org> wrote: > I have in my possession a back plane from a BA23. > Somebody has put glue in the last three slots. > Can anybody explain that? DEC sold a lower-priced, limited expansion MicroVAX II/RC, and rather than

Re: Did DEC make a Daisy Wheel printer?

On Sun, Oct 8, 2017 at 10:19 AM, Zane Healy via cctalk < cctalk@classiccmp.org> wrote: > Did DEC make any sort of impact printer, besides dot-matrix printers? I > have an LA50 or two, and dot-matrix isn’t what I’m after. > They sold some drum, chain, and band printers, but I think they were all

32-bit x86 (was Re: The origin of the phrases ATA and IDE)

On Oct 6, 2017 12:42, "ben via cctalk" wrote: On 10/05/2017 03:46 PM, Chuck Guzis via cctalk wrote: > >> >> >> I recall an Intel engineer opining on the subject. "We give you a >> 32-bit advanced architecture CPU and you p*ss it away running DOS." >> >> Compatibility is a

Re: HP 9845 complete system on auction in Sweden

On Sep 22, 2017 11:47 PM, "Curious Marc via cctalk" wrote: I didn't know you could interface a 9845 with a 7970 tape drive. The 9845 was the top-of-the-line workstation. It could be interfaced to almost everything computer-controlable that HP made.

Re: RIP Jerry Pournelle - Firsts

On Mon, Sep 11, 2017 at 7:43 PM, Charles Dickman via cctalk < cctalk@classiccmp.org> wrote: > On Mon, Sep 11, 2017 at 1:15 PM, Shoppa, Tim via cctalk > wrote: > > He seems to have been the first to mention ARPANET in a popular > hobbyist-type context like BYTE. (Leading

Re: origin of 3D-printing?

See also "Pay for the Printer" by Philip K. Dick, 1956.

Re: origin of 3D-printing?

See also "Pay for the Printer" by Philip

Re: IBM 5110 with 5114 & 5103 on Pittsburgh Craigslist

On Aug 6, 2017 12:44 PM, "Sam O'nella via cctalk" wrote: Theyre always out of my reach but is there a way to upgrade or convert 5100/5110s to IPL or basic or are you stuck with what you get? I assume you meant APL. In general you're stuck with what you get. In

Re: scary warning about bubble memory loop mask, TI 763/765 maint manual

On Aug 6, 2017 08:20, "dwight via cctalk" wrote: I wonder if they can be reset by just removing the bias magnets. The bias field is needed to maintain the domains in the material. With the Intel bubble parts, if they get erased, you have to use special electronics and

Re: scary warning about bubble memory loop mask, TI 763/765 maint manual

On Aug 5, 2017 19:42, "Chuck Guzis via cctalk" wrote: My recollection is that the track data was printed by Intel. At least mine came that way. Both Intel and TI printed the bad loop map/mask on the device label. Intel also programmed the map into a special "boot loop"

scary warning about bubble memory loop mask, TI 763/765 maint manual

Al just put the TI Silent 700 Model 763/765 maintenance manual up on Bitsavers. (Thanks Al!) The 763 and 765 are the models using internal bubble memory for between 10,000 and 80,000 characters of local storage. They use either one or two "discrete memory boards", with one 92 Kbit bubble device

Re: 2.11BSD on two RL02 drives? Probably not, but...

On Wed, Aug 2, 2017 at 7:24 PM, systems_glitch via cctalk < cctalk@classiccmp.org> wrote: > You might consider just adding another storage controller. I'd recommend > something that talks MSCP. SCSI seems to be what most people are after > nowadays, but ESDI controllers are much cheaper, and the

Re: WTB: RX02 Floppy Disks

On Tue, Aug 1, 2017 at 6:21 PM, Charles Dickman via cctalk < cctalk@classiccmp.org> wrote: > Are RX02 disks actually special or will any SSDD 8in floppy work? TL;DR: No. As standard 8-inch floppy disks go, only SSSD are useful in an RX02 drive, even for double-density use (DEC RX02 modified MFM

Re: Importing a PDP-8 from Canada

On Mon, Jul 31, 2017 at 6:15 PM, Michael Thompson via cctech < cct...@classiccmp.org> wrote: > The RICM has an opportunity to get a PDP-8/M (built in Maynard, MA) that is > in Canada. I remember that there was a discussion on the procedure here, > but I can't find it with Google. > If it is

Re: Seeking correct EuroCard dimensions

On Fri, Jul 28, 2017 at 5:16 PM, David Griffith via cctalk < cctalk@classiccmp.org> wrote: > > I'm trying to verify the correct dimensions for a 160mm x 100mm EuroCard. > I figured this would be simple: 160 millimeters by 100 millimeters. But > when I submitted a template to the Kicad project at

Re: Diskette size (was: Repurposed Art (ahem...)

On Jul 19, 2017 10:15 AM, "Fred Cisin via cctalk" wrote: > That Steve Jobs was pestering them for a cheap drive, but due to the holes in his jeans and personal hygiene?, they never took him seriously. I think Shugart settled on 5.25" for the size of a minifloppy at least a

Re: PDP11 and Simh Floating point

On Jul 19, 2017 10:43 AM, "Douglas Taylor via cctalk" wrote: The pdp11_fp.c code is quite intricate. If simh was a simple simulation it would take the easy route and use the intel fp co-processor as you point out, but it doesn't. It actually 'emulates' what the pdp11

Re: early (pre-1971) edge-triggered D flip-flop ICs

On Wed, Jul 19, 2017 at 11:29 PM, Ethan Dicks wrote: > I have no datasheet, but I have examples on DEC M-series FLIP-CHIP > modules from my PDP-8/L, c. 1968. > > I am pretty sure I have examples with 1968 date codes and possibly > 1967 date codes. > Thanks! Also, the 1967

Re: early (pre-1971) edge-triggered D flip-flop ICs

Thanks for all the info, Brent! The MECL II MC1022 is an edge-triggered D flip-flop using master-slave design. I'll have to look up the others you mentioned, especially the National DM8510 and Sprague NE8828. I've previously overlooked the MC778 mW RTL D flip-flop, which also uses a variant of

early (pre-1971) edge-triggered D flip-flop ICs

I'm interested in the history of the logic design for the edge-triggered D flip-flop, as used in the SN7474. The design is composed of three set-reset latches (six NAND gates total) per flip-flop. Does anyone know what year the SN7474 was introduced, or have an early datasheet for it (prior to

Re: Through-hole desoldering (was Re: IBM 5110 - Where does the character set live? And other questions.)

On Thu, Jul 13, 2017 at 10:42 AM, William Sudbrink via cctalk < cctalk@classiccmp.org> wrote: > If you have the bucks, go for a Pace station with an SX-100 desoldering > tool. 40 pin chips > fall out like they were never soldered in the first place. > That's my experience with the Hakko

Through-hole desoldering (was Re: IBM 5110 - Where does the character set live? And other questions.)

On Wed, Jul 12, 2017 at 8:38 PM, Robert via cctalk wrote: > Side note: It's probably not a good time to try out my shiny new heat > gun that I've never yet used. Maybe save my first go on it for > something more replaceable. > A heat gun is definitely NOT the right tool

Re: tape baking (Rob Jarratt)

On Mon, Jul 10, 2017 at 3:38 PM, Rob Jarratt via cctalk < cctalk@classiccmp.org> wrote: > Do you have any videos (with sound!) of the LP20 operating? > The LP20 is just the printer interface. It looks exactly the same whether it's operating or not, and doesn't make any sound unless something is

Re: IBM 5110 - Where does the character set live? And other questions.

On Mon, Jul 10, 2017 at 1:13 PM, Robert via cctalk wrote: > I've recently picked up a 5110 (BASIC only), along with a 5114 floppy > ... > t powers on, completes its self test and gets to LOAD0, but several > of the characters are only partially drawn on the screen. The

VT100 keycaps? "Z" wanted

My VT180 is missing the "Z" keycap. Does anyone happen to have VT100-series keycaps to spare? (Or an entire keyboard to sell?) Best regards, Eric

Re: Electronic Systems TRS-80 Serial I/O Board?

On Wed, Jun 14, 2017 at 6:14 PM, jim stephens via cctalk < cctalk@classiccmp.org> wrote: > FWIW the send and receive clocks are separate on the 1602 Uart. > That is true of all traditional UARTs. For fancier parts intended for direct connection to microprocessor buses , some have separate

Re: Electronic Systems TRS-80 Serial I/O Board?

It's actually a legit measurement, but it's basically how much total jitter + bit-proportioned rate error the rx signal can have as a percentage of bit time, and doesn't matter nearly as much when receiving from all-electronic transmitters, vs mechanical such as TTY. I'm sure it made the

Re: Electronic Systems TRS-80 Serial I/O Board?

On Tue, Jun 13, 2017 at 6:59 PM, Chuck Guzis via cctalk < cctalk@classiccmp.org> wrote: > Well, I didn't say "timing error", I did say "timing distortion", which > is not quite the same thing. My reference was the "TR1602/TR1863/TR1865 > MOS/LSI Application Notes Asynchronous Receiver

Re: Electronic Systems TRS-80 Serial I/O Board?

On Tue, Jun 13, 2017 at 5:53 PM, Chuck Guzis via cctalk < cctalk@classiccmp.org> wrote: > The TR1602 UART, like its cousin, the AY-3-1013 used in the TVT, > tolerates a pretty wide range of bit rate distortion. The app note > gives a figure of something like 49%. And, since it's async, the game

Re: Electronic Systems TRS-80 Serial I/O Board?

On Tue, Jun 13, 2017 at 12:39 AM, Chuck Guzis via cctalk < cctalk@classiccmp.org> wrote: > The trimpot on the board says to me that the clock is most likely a > simple RC affair. That does seem likely. >For low bitrates, that's perfectly adequate. > A person might think so, but as DEC

Re: Serial keyboards

On Tue, Jun 6, 2017 at 3:48 PM, Guy Sotomayor Jr via cctalk < cctalk@classiccmp.org> wrote: > Yes, I’ve been dealing with the morons who strip the keyboards off of (now > rare) IBM 327x terminals, > cut the connectors off and wire them up to PS/2 or USB. May they burn in > hell. > I have an IBM

Re: Commodore Pet 8032 keyboard repair - conductive or capacitive?

Commodore didn't use any capacitive keyboards on 6502-based computers. That would have taken extra electronics and cost more. I don't know whether any of the Amiga keyboards were capacitive, but I suspect not.

Re: Firefly dual processor card

On May 31, 2017 11:06 AM, "Paul Koning via cctalk" wrote: To clarify: Firefly is an internal-only device built by DEC research in Palo Alto. It wasn't a product and as far as I remember wasn't the basis of one, either. There are some DEC SRC reports that describe aspects

Re: Firefly dual processor card

Did you get an actual Firefly (research) board, or a prduction VAXstation 3520/3540 board? I don't think you're likely to find schematics or pinouts for either, but it's not impossible to find 3520/3540 stuff, while I've never before heard of anyone encountering any actual Firefly boards in the

Re: Commercial AIM-65 Video Controller?

On May 19, 2017 10:46 PM, "dwight via cctalk" wrote: I don't believe the AIM-65 normally does color?? The AIM-65 normally does one color, which is red, on its alphanumeric LED displays.

Re: AT Work Group System Voice Power voice processing boards for Unix PC 6300/7300 for sale

Back when the Voice Power board for the 7300/3B1 UnixPC was of mainstream interest, I spent some time trying to obtain specifications and programming information regarding the Western Electric DSP20 chip it used. Unlike the DSP16 and DSP32, WE (and AT Microelectronics) did not offer the chip for

Re: Extracting files off “unknown” 8 inch disks. Any thoughts…

On Fri, May 5, 2017 at 3:02 PM, allison via cctech wrote: > In the PDP-10 realm not less than a handful Tops10. ITC, more. > TOPS-10 doesn't have any filesystems for floppy disks, though the KL10 front-end PDP-11/40 running RSX-20F does, and there are utilities to access

Re: Looking for TRS-80 Model parts (and/or someone in the Phoenix, AZ area)

On Mon, May 1, 2017 at 12:49 PM, Peter Cetinski via cctalk < cctalk@classiccmp.org> wrote: > The 8mhz [MC68000 for TRS-80 Model 16/6000] boards are similarly unobtanium Is a schematic for the 8 MHz board available? Is there any other tech info about the differences between the original 6 MHz

Re: TRS-80 Model 12 versus 16B

On Tue, Apr 25, 2017 at 8:28 PM, Jim Brain via cctalk wrote: > Been trying to Google things, but not having a lot of luck. I understand > both are white case, both have slimline drives, 12 had no card cage, I > think I read somewhere that the 16 came with 68K std (no

Program Logic Manual (PLM) for APL\360 or APL.SV?

Did IBM publish a Program Logic Manual (PLM) for APL\360, APL.SV, or any other APL language implementation, as they did for e.g. their FORTRAN(E) and PL/I(F) compilers?

Re: If C is so evil why is it so successful?

On Wed, Apr 12, 2017 at 9:55 AM, Sean Conner via cctalk < cctalk@classiccmp.org> wrote: > Yeah, I'm having a hard time with that too. I mean, pedantically, it > should be: > > #include > int main(void) { return EXIT_SUCCESS; } > > where EXIT_SUCCESS is 0 on every plaform

Re: remember xvscan?

On Apr 11, 2017 5:29 AM, "E. Groenenberg via cctalk" wrote: > Wasn't that not an add-on to 'xv' (xv-3.10a)? xvscan was based on xv but was sold including xv, with the xvscan price including the cost of an xv license.

Re: RTX-2000 processor PC/AT add-in card (any takers?)

On Apr 11, 2017 11:29 AM, "Chuck Guzis via cctalk" wrote: > This has me wondering about how the 432 people implemented FORTRAN. Oh, there's a very simple answer to that. They didn't! Early in the 8800/432 development (which started in 1975), Intel was developing their own

Re: The iAPX 432 and block languages (was Re: RTX-2000 processor PC/AT add-in card (any takers?))

On Mon, Apr 10, 2017 at 3:39 PM, Sean Conner wrote: > What about C made it difficult for the [Intel iAPX] 432 to run? > The iAPX 432 was a capability based architecture; the only kind of pointer supported by the hardware was an Access Descriptor, which is a pointer to an

Re: RTX-2000 processor PC/AT add-in card (any takers?)

On Apr 10, 2017 2:43 PM, "Chuck Guzis via cctalk" wrote: > Were there any microprocessor chips that attempted to mimic the > Burroughs B5000 series and natively execute Algol of any flavor? Yes, that's what the HP 3000 did (before PA RISC), and they did make microprocessor

Re: Trip to CHM - Hotel/Restaurant Advice

On Thu, Mar 30, 2017 at 5:05 PM, Rich Alderson via cctalk < cctalk@classiccmp.org> wrote: > and what there are are not > easily within walking distance of good food (In 'n' Out does not qualify). > Them's fightin' words!

Re: PSU protection with resettable polyfuse

On Wed, Mar 29, 2017 at 9:24 AM, Systems Glitch via cctalk < cctalk@classiccmp.org> wrote: > > Any downsides to resettable polyfuses? > > If you hit them hard enough, they'll sometimes permanently open, which is > desirable anyway but does require rework. I don't remember how they stack > up

Re: Floating point routines for the 6809

On Mon, Mar 27, 2017 at 2:53 PM, Sean Conner via cctalk < cctalk@classiccmp.org> wrote: > Some time ago I came across the MC6839 ROM which contains floating point > routines for the 6809. The documentation that came with it stated: > > Written for Motorola by Joel Boney, 1980 >

Re: TRS-80 Model 1 Expansion Interface question?

On Mon, Mar 20, 2017 at 6:46 PM, Win Heagy via cctech wrote: > The expansion interface hardware manual indicates > it is an FD1771B-01, but the service manual indicates a couple > possibilitiesFD1771 A/B -01 -11. Any considerations to look for here? > All other

Re: Pair of Twiggys

On Mar 15, 2017 3:28 PM, "Fred Cisin via cctalk" wrote: > I was surprised that Jobs didn't make the Lisa floppy 5.0 or 5.5 inches, I assume that Apple wanted to get at least a small benefit of economy of scale from media manufacturers not having to retool for a different

Re: I hate the new mail system

On Tue, Mar 7, 2017 at 2:48 AM, Christian Corti via cctalk < cctalk@classiccmp.org> wrote: > And cctalk@... is neither responsible for the writing of the message nor > does it belong to the author of the message. But replies should be directed > there, so there should be a Reply-To: field

Re: Clock program for COSMAC Elf microcomputer with PIXIE graphics

On Fri, Mar 3, 2017 at 3:27 AM, Eric Smith wrote: > I've written a clock program to run on an unexpanded Elf with PIXIE > graphics > A few seconds of video of it running on a Netronics Elf II: https://www.youtube.com/watch?v=vKCsw_7wpdw

Re: Binary keypad front panel

On Mar 3, 2017 12:58 PM, "John Wilson via cctalk" wrote: > It occurred to me that lots of old machines had binary front panels > (switches and lights) and lots of machines had keypad front panels (octal > or hex, with 7-segment LEDs), but I'd never seen a binary keypad

Clock program for COSMAC Elf microcomputer with PIXIE graphics

I've written a clock program to run on an unexpanded Elf with PIXIE graphics. It proved to be quite a challenge to fit it into 256 bytes, but I've now got it working, with two bytes of RAM to spare. There are 12-hour and 24-hour versions. I've released it under the GPL 3.0 license. The source

Re: MIPS I-IV instruction set standards

On Mon, Feb 27, 2017 at 11:59 PM, Angelo Papenhoff via cctalk < cctalk@classiccmp.org> wrote: > I'm wondering where the MIPS I-IV standards that are referenced > everywhere are defined. I was able to actually find what seems to be the > IV standard [1] but found no such thing for I-III. I didn't

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