Identifying LSI Logic IC

Can anyone identify this IC? https://imgur.com/a/CU7Cn8z This is from an Omega VLF receiver. I don't see many custom parts within this unit, but perhaps this is one? Thanks, Kyle

Re: Pro-Log M980 Programmer

On Sat, Jul 24, 2021, 11:50 Randy Dawson via cctalk wrote: > I had a Data I/O 29B with a serial interface and I assume your Pro-Log is > similar. > Cabled up and baud correct you should get a menu on a CR with your host. > Mine took an Intel or Motorala ASCI HEX string on power up without any >

Re: DEC pin

On Wed, Mar 24, 2021, 17:50 Fritz Mueller via cctalk wrote: > > https://www.computerhistory.org/collections/catalog/102682110 > > Timely! > > --FritzM. Thank you! It was a hard thing to search for. I kept getting all of these other results, for some odd reason... "Did you mean...?" No,

DEC pin

Does anyone have a picture of the "I've been VAXinated" pin? I know I've seen this pin before, probably at some VCF event. Thanks, Kyle

Re: TC08 DECtape bootloader question

On Sun, Mar 21, 2021, 18:07 Rick Murphy via cctalk wrote: > The instruction that's waiting on the done bit to be set is overwritten > with a NOP while the bootstrap is being read. This is common for > bootstraps: minimal user-entered code that gets overwritten by the boot > when it's being

Re: TC08 DECtape bootloader question

On Sun, Mar 21, 2021, 09:35 Rick Murphy via cctalk wrote: > > You have to read the bootstrap code in the TC0x driver to understand this. > I agree with your assessments, but I'm referring to the first stage bootloader: either your toggle-in or MI8E-based ROM bootstrap. In the case of that, the

Re: TC08 DECtape bootloader question

On Sat, Mar 20, 2021 at 7:19 PM Kyle Owen wrote: > However, it appears as though word count will be hit by the loading of the > first block. In fact, my instrumented version of SimH says it's overwritten > with a zero. If that's the case, it would seem as though the word count > o

TC08 DECtape bootloader question

My understanding of the OS/8 TC08 bootloader (MI8-EC) is as follows: 0. Rewind tape 1. Set current address (07755) to 07600 2. Set word count (07754) to -0200 3. Read block 0 and wait for flag 4. Continue executing at 07600 However, it appears as though word count will be hit by the loading of

Re: DECtape ancestry

On Sat, Mar 20, 2021, 16:13 Paul Koning wrote > Speculating here since I have no direct knowledge: the DECtape format > allows read and write in either direction, while LINCtape only allows read > and write forward. The bidirectional I/O capability was part of DECtape > format from the start,

Re: DECtape ancestry

Why did DEC not use the LINCtape format for the PDP-8? I assume maintaining format compatibility between their low, mid, and high range systems was important to them? I suppose there was no other good solution to transferring large files across different DEC platforms than to use magnetic

Re: DF32?

On Tue, Mar 9, 2021 at 6:38 PM Paul Koning via cctalk wrote: > Sure, a generalization of Dave Gesswein's MFM emulator. I was just > looking the other day how practical it would be for such a device to do an > RK05 emulation. The answer seems to be: quite practical. > Dave made a DF32/DS32

PDP-8/I vs 8/E EAE

Has anyone noticed a difference in DVI overflow behavior on the PDP-8/I EAE versus the PDP-8/E EAE? The 8/E EAE claims to be 8/I compatible in Mode A, and I think I agree, for the most part. At least, it's compatible for the parts that matter. When a DVI instruction results in overflow, the EAE

IBM System/370 turns 50 years old

Happy birthday to the 370! Looks like it was released to the press on 30 June 1970. https://www.ibm.com/ibm/history/exhibits/mainframe/mainframe_PR370.html Kyle

Re: Game Of Life, John H. Conway

On Thu, Apr 30, 2020, 14:15 Boris Gimbarzevsky via cctech < cct...@classiccmp.org> wrote: > Seeing that video makes me want to play around with game of life again. > Once it came out in October 1970 Sci Am, we were all coding it but > not nearly as much fun doing it as a batch FORTRAN job and

SWTPC SuperClock II board

In the midst of cleaning up, I came across this board. Can't seem to find any info online about it. There's another board from another company, not SWTPC, with the same name—apparently a timekeeping board for an Apple II. https://imgur.com/a/j8pyqMZ I assume this is a way to generate a composite

Re: Houston Computer Museum Warehouse Liquidation

Have any list members seen the place in person? Have any list members successfully bought anything yet? I have tried reaching Thomas by email and phone, to no avail. Just wondering if others have had similar challenges. Thanks, Kyle

Re: plated wire memory

On Sun, Oct 20, 2019, 09:45 Nigel Johnson via cctalk wrote: > I remember an IBM engineer talking about this at our ham radio club. The > wire was coiled inside a drum and pulses were sent down the wire. The > 'read head' was a magnetic pickup at the other end of the coil - and > access time

Re: Vintage Computer Warehouse Liquidation

Thomas, I'm interested in anything HP, SGI, early Sun, and pre-VAX DEC. Do you have any photos? What kind of condition is most of this stuff in? I've been thinking about visiting Computer Reset with a box truck this fall. Think I could stop by? Many thanks, Kyle On Sun, Sep 22, 2019, 15:41

Re: Ferroresonant transformer supply repair

On Mon, Sep 9, 2019 at 4:06 PM Marc Howard wrote: > BTW, Genteq is a reputable brand. It is the former GE capacitor division, > hence the name Gen(eral Electric)teq(technology). > > On Mon, Sep 9, 2019 at 1:02 PM Marc Howard wrote: > >> Amazon is your friend: >> >> >>

Re: Ferroresonant transformer supply repair

On Sun, Sep 8, 2019 at 11:18 PM Mattis Lind wrote: > Mouser has CDE 8 uF 660 VAC. 11 are on order from the manufacturer. > > > https://www.mouser.se/ProductDetail/Cornell-Dubilier-CDE/SFA66T8K475B-F?qs=sGAEpiMZZMu3dWSqd4Tl0A9wIZdhZWWRKQi0fpV8QTUDmNGSFUtTTQ%3D%3D > > I have replaced several of

Re: Ferroresonant transformer supply repair

On Sun, Sep 8, 2019, 20:39 Guy Dunphy via cctalk wrote: > > > >We recently replaced the ferroresonant capacitor in a power supply on the > CHM's > >PDP-1. They do fail (thankfully, not often) - and they are not > super-critical > >as to value. If the one you're replacing has the same marked

Ferroresonant transformer supply repair

Has anyone replaced the capacitor in a ferroresonant power supply with much success? My current understanding is that the capacitor and transformer are mated as a pair, so replacing just one of them would require careful consideration. The PDP-8/I I'm working on has a 704A in it, with a GE 8uF

Re: SGI Personal Iris information

On Sun, Jul 14, 2019, 07:20 Patrick Mackinlay via cctech < cct...@classiccmp.org> wrote: > I'm currently working on emulating the 4D/20 in MAME, and looking for > anyone who might have actual hardware, software or documents that might > help. > Would photos of a 4D/35 be helpful as well? If so,

Identifying some boards

I picked up these boards many weeks ago, but haven't photographed them until recently. Some of them are pretty disgusting, but some of the others look alright. Anyone have any idea what these came out of? Some are labeled Gould, others are labeled Encore. http://imgur.com/a/d9iK9qb Thanks!

Game of Life for PDP-8

Back at VCF PNW, the subject of the Game of Life came up among some peers. I recall messing with the BASIC version that supported 32 by 32 cells, and there's also a FOCAL version that can do a whopping 11 by 11 cells. This was simply not enough. So, I wrote my own implementation and came to the

PDP-8: count number of set bits in a word

Just wondering if anyone has come up with a fast way to count the number of 1s in a word on a PDP-8. The obvious way is looping 12 times, rotating the word through the link or sign bit, incrementing a count based on the value of the link or sign. With a small lookup table, you can reduce the

Re: Yes there is a PDP 10 front panel and Kenbak on Ebay

On Wed, Apr 3, 2019, 15:01 Al Kossow via cctalk > > On 4/3/19 11:51 AM, Bill Degnan via cctalk wrote: > > > and no, a "best offer" of $250 for the front panel will not be accepted. > > because it's $125 lower than the last one that sold. > > https://www.ebay.com/itm/113190860596 That

Re: PDP-8 signed overflow detection

Overflow can be summarized in a few ways, such as: (sign of arg_a XOR sign of arg_b == 0) AND (sign of arg XOR sign of result == 1) or, less intuitively, the carry into the sign != the carry out of the sign. My first inclination was to try the XOR approach, as that was most intuitive to me. Using

PDP-8 signed overflow detection

What is the shortest subroutine on a PDP-8 which will add two variables in RAM and return the saturated sum (that is, returning 2047 or -2048 upon overflow, otherwise the sum) in the accumulator? Kyle

DECtalk-PC Schematic

Hi all, I recently got one of these DECtalk-PC ISA cards from eBay ( https://www.ebay.com/itm/183684666377, no affiliation with seller other than a happy customer) and was wondering, does anyone have a schematic for this? Thanks! Kyle

Re: Dumping contents from MC68701

On Sun, Feb 17, 2019, 15:52 Al Kossow via cctalk it depends on the version of 68701 > > P3 has no protection P5 does > > a P3 can be read with a Data I/O Unisite > > http://matthieu.benoit.free.fr/pdf/MC68705P5_Bootstrap_ROM_Listing.pdf > > The P5 is more involved. You put it into factory test

Dumping contents from MC68701

Has anyone been successful in dumping the EPROM contents from an MC68701? As I understand it, this MCU requires executing a particular program from external memory to access the internal EPROM, both for programming and reading. I will write a utility to dump the contents if necessary, but I am

Re: SGI Personal Iris 4D/35

On Mon, Feb 11, 2019, 19:02 John Ball via cctalk Hey Kyle. > You can narrow things down a bit by removing the optional Z-buffer and > additional bitplane memory (ZB3 and BP4). While that removes those two > masses of memory out of the equation that still leaves the still massive > amount of ZIPP

Hickok MEM-70 Core Memory Trainer

Picked up this core memory trainer yesterday. Seems pretty obscure. http://imgur.com/a/TIOvt7r Has anyone seen one before? Would love to find some documents someday. Thanks, Kyle

Re: SGI Personal Iris 4D/35

Here's some pictures of the system: http://imgur.com/a/NNA2xYq Thanks, Kyle

Re: Bellmac 8 Tutor on ebay

Bringing up a bit of an old thread here, as I just picked up one of these yesterday. Typed in some example programs, which took far too long thanks to a bouncy keypad. But hey, at least it works! Were there any real applications for the MAC-8? Haven't been able to find much. Thanks, Kyle

SGI Personal Iris 4D/35

I've got a graphics issue in my 4D/35, and I suspect it's a VRAM chip. I've got vertical lines appearing on the screen, but not everywhere on the screen; that seems to hint at an issue with one buffer having bad memory. It was especially evident in the flight simulator demo, where alternating

Re: off topic - capatob - saratov2 computer Russsian pdp8? HELP

On Mon, Jan 7, 2019 at 8:51 AM Peter Corlett via cctalk < cctalk@classiccmp.org> wrote: > Thanks to inflation, $0.25 in 1972 is worth $1.51 now. Likewise, $1.25 has > inflated to $7.54. So they're cheaper in real terms than they used to be. > > However, it's still not entirely comparable, as I

Re: music dec tapes? (paper)

On Thu, Jan 3, 2019 at 3:29 PM allison via cctech wrote: > Those were likely with a PDP12 or LAB-8 with DAC board. The code > actually is a roughly > digital version of tones in 10 or 12 bit form by writing sequential > words (waveforms) to > the DAC. > Do you have any information on the

Re: music dec tapes? (paper)

On Thu, Jan 3, 2019, 17:48 allison I don't think this album has been forgotten; I have a copy, and I know > others with copies, too. It seems as though "Unplayed by Human Hands" (both > versions) are less well-known. I would like to work on getting the original > software archived, assuming it's

Re: music dec tapes? (paper)

On Tue, Jan 1, 2019, 18:23 Bill Degnan via cctalk I have these, plays music over the radio > b > Bill, which of these tapes do you have exactly? I've checked and it would appear DECUS 8-152 is not intended to play over the radio, but rather with a DAC (or two). I'm still working on fully

Re: music dec tapes? (paper)

On Tue, Jan 1, 2019, 15:18 Adrian Stoness via cctalk anyone seen these music tapes before i grabed this trays for the oddnes of > the content of these tapes? also apears to have the software to play them? > > >

Re: WTD: 9 track open reel for PDP-11

On Thu, Dec 27, 2018, 13:23 Jason T via cctalk On Thu, Dec 27, 2018 at 11:17 AM W2HX via cctalk > wrote: > > Does anyone have a (preferably working) 9-track drive that can be used > with a PDP-11 (like a pertec interface) for sale? Willing to drive anywhere > from Philly to Boston for one. > > A

Re: OCR old software listing.

On Wed, Dec 26, 2018 at 6:15 PM Chuck Guzis via cctalk < cctalk@classiccmp.org> wrote: > On 12/26/18 3:17 PM, Al Kossow via cctalk wrote: > > > > And TYPE the programs in again > > I've found that it's often the best course of action and consumes the > least time overall. You also have a better

Re: Another weird paper tape

On Mon, Dec 24, 2018, 15:16 Fred Cisin via cctalk THEN, you insert that message a few characters at a time between words in > Ed's posts. He has cleverly been steganographically relaying the hidden > message for a while. > Maybe the real data has to be read between the holes...! Here's the

Re: Another weird paper tape

On Sun, Dec 23, 2018, 17:52 Paul Koning > > > On Dec 23, 2018, at 6:24 PM, Kyle Owen via cctalk > wrote: > > > > I have another paper tape...this time, it's 7-channel. > > > > I dumped it and found that it has very, very little data on it. > > ...

Another weird paper tape

I have another paper tape...this time, it's 7-channel. I dumped it and found that it has very, very little data on it. Tape image here: https://drive.google.com/open?id=1kCiSiNuPvAPzBG0XCqBJiBoPhjmyvU21 Here's some of the first of the tape. 000 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80

Re: Unknown paper tape format

I think I found some promising info...haven't read through it all yet: https://ia801201.us.archive.org/23/items/DTIC_ADA038326/DTIC_ADA038326.pdf Here's photos of the reel: https://photos.app.goo.gl/u4UdDYc1RxYGTSh99 I see mention of a SEL 8600 computer. I wonder if this is for the SEL, or

Unknown paper tape format

I found a spool of mylar tape dated 23 March 1972, with "EARS" on it; best I can tell, this was for the Experimental Array Radar System. Image can be found here: https://drive.google.com/open?id=11VKKklor1QDyWCz0b3zVNj_I_vmt4oN4 Anyone have any clue as to the format? Here's the beginning of the

Re: Core memory emulator using non volatile ram.

I've seen a lot of talk about memory technologies, but as far as I can see, no one has offered any complete solutions. One already exists, thanks to the efforts of Steve Lafferty, Vince Slyngstad, and others. http://so-much-stuff.com/pdp8/32KOmnibus/32KOmnibus.php Yes, it uses a battery. FPGAs

Re: remove bad yelpMATERIAL INGEST. adams associates COMPUTER CHARACTERISTICS QUARTERLY 1963

On Sun, Dec 16, 2018, 14:00 ED SHARPE via cctalk > How to Remove Bad Yelp Reviews (and Report Fake Yelp Reviews)MATERIAL > INGEST ADAMS ASSOCIATES COMPUTER CHARACTERISTICS QUARTERLY 1963 > > HAVE ONE A LITTLE CUTE LOOKS AS NEW POCKET GUIDEI SEE ONE IN > GOOGLE SCANNED FROM

Re: AMD Am8177 Datasheet

On Fri, Dec 14, 2018 at 1:36 AM Randy Dawson wrote: > Let us know of any bipolar AMD am2900, anything in the am2900 Bipolar > Microprocessor Family. > 2900 demo board: > http://www.donnamaie.com/AMD_Vintage/EVAL_Board_cropped_reduced.pdf > Guess I have a whole 8 bits of computing power!

Re: AMD Am8177 Datasheet

On Thu, Dec 13, 2018, 23:49 Marc Howard via cctalk Kyle, > > Where did you find that part? I designed the video stage of the AT Pixel > Machine back in the late 80's using that part. It was perfect for us as I > had to access up to 16 cards worth of pixels in TTL and spit out a video > rate

Re: AMD Am8177 Datasheet

Gah...just found it. http://www.bitsavers.org/components/amd/_dataBooks/1989_AMD_Personal_Computer_Products.pdf Page 693 of the PDF. Sorry, Kyle On Thu, Dec 13, 2018 at 11:30 AM Kyle Owen wrote: > Does anyone have a datasheet for an Am8177 shift register? Seems to be ECL. > &g

AMD Am8177 Datasheet

Does anyone have a datasheet for an Am8177 shift register? Seems to be ECL. Thanks, Kyle

Re: Documation card readers for sale

On Wed, Dec 12, 2018 at 6:50 PM Curious Marc via cctalk < cctalk@classiccmp.org> wrote: > Interested in the Arduino interface too. Will save me some time. Has it > been posted anywhere? > > Marc > Sorry it took me a while to get it. Here's the program, ca. 17 January 2015.

Re: PDP-8/e

On Sat, Dec 8, 2018 at 12:36 AM Josh Dersch via cctalk < cctalk@classiccmp.org> wrote: > On Fri, Dec 7, 2018 at 10:29 PM Rod G8DGR via cctalk < > cctalk@classiccmp.org> > wrote: > > > It can only do 110 baud !! > > > > Unless you have an oddball SLU, this is not true -- what do you have >

Re: Sun Monochrome TTL Monitors

On Fri, Dec 7, 2018 at 10:46 AM Stefan Skoglund wrote: > > You have one the ECL one ie (i think) bwtwo. > > https://www.sun3arc.org/FEH/CPU/3_60.phtml Ahh, so it's built onto the board itself. Cool. I'll see about what it would take to convert it to something else; might be a good Verilog

Re: Sun Monochrome TTL Monitors

Upon closer inspection, it appears as though I have no frame buffer. Drats. https://photos.app.goo.gl/ariFxb8xggERExkU9 Anyone have a spare that would work? Thanks, Kyle

Sun Monochrome TTL Monitors

What are people doing for early Sun monitor replacements? I've got a Sun 3/60 that I'd like to hook up to a modern monitor, but am unaware of any means of doing so. Thanks! Kyle

Zapata Tormenta ISA card

Does anyone have a Zapata Tormenta card that they'd be willing to sell? Thanks, Kyle

Re: SPARCstation 20 with SCSI2SD

On Sun, Nov 25, 2018 at 9:50 PM wrote: > > Ah cool. I was at a friend's brother's house on a work trip out to Silicon > Valley. One of his friends was there, with something amazing running in > QEMU. It was a work in progress, but he said that there were a lot of > issues because QEMU was too

Re: SPARCstation 20 with SCSI2SD

On Sun, Nov 25, 2018 at 9:14 PM wrote: > Since you said QEMU, you are emulating this? If on the real hardware, is > the NVRAM memory dead? Looks like it doesn't know what kind of hardware it > is. Real hardware will loose nvram battery and need to be replaced and > reprogrammed, or you can file

Re: SPARCstation 20 with SCSI2SD

Well, got the last problem solved rather quickly: I tried using 512 byte sectors for the emulated CDROM instead of SCSI2SD's default of 2048 for a CDROM, and that did the trick. Working my way through the SunOS 4.1.3 installation process now on the SS-20. > If anyone has some advice on how to get

NeXT Monitor Problem

I've got a NeXTstation Turbo and a MegaPixel display; the computer boots fine, but seems to complain of a failing hard drive. The monitor works okay; slight burn in, but otherwise looks okay in terms of the phosphor. However, something seems to be wonky with the horizontal scan...the left edge is

Re: How to work out unknown PSU replacement

On Sun, Nov 4, 2018, 16:56 Mike Stein wrote: > > Neat trick; surprised I'd never heard of it before in my decades of > trouble-shooting. Then again, at my advanced age and senility I might just > have forgotten... ;-) > > Thanks! > > > Hah! Probably also best to discharge the caps before

Re: How to work out unknown PSU replacement

On Sun, Nov 4, 2018, 16:23 Mike Stein via cctalk wrote: > > - Original Message - > From: "Adrian Graham via cctalk" > To: "General Discussion: On-Topic and Off-Topic Posts" < > cctalk@classiccmp.org> > Sent: Saturday, November 03, 2018 4:59 AM > Subject: Re: How to work out unknown PSU

Action Computer Enterprise and ADES

Anyone have any manuals or software for an ACE 1600? Or manuals for an ADES hard drive? I've had this one in storage for a while, but it seems fairly interesting and possibly complete. http://imgur.com/a/KR83Okw Thanks, Kyle

VT320 Fonts

Does anyone know of any more downloadable VT320 fonts and glyphs? This is about all I could find at the moment. https://vt100.net/dec/vt320/fonts Trying to find some Cyrillic fonts so that Tetris looks right. I suppose I can try to write my own, but that would take a good bit of effort to get it

Re: Floating point math in FORTRAN IV on PDP-8

On Mon, Sep 24, 2018, 05:59 Rick Murphy wrote: > > Since it's (apparently) working for me, it seems like your FRTS.SV is > probably a version with a bug in the EAE-disabled FP emulator. Note that > getting the parts of the compiler right is hard, which is why the PiDP-8 > project has put a lot

Re: Floating point math in FORTRAN IV on PDP-8

On Sun, Sep 23, 2018 at 8:28 PM Rick Murphy via cctalk < cctalk@classiccmp.org> wrote: > > That seems like you have a mixed-up F4 compiler/runtime. > On my system (SIMH) I get the same results, FPP enabled or disabled. > Don't know how to enable/disable EAE on SIMH, unfortunately. > > What you're

Re: Manual for Documation TM200 punched card reader

On Sat, Sep 22, 2018 at 9:39 AM Guy Dunphy via cctalk wrote: > By coincidence, today I started evaluation of a punched/optical card > reader. > Model TM200, made by Documation Inc. > > Naturally I have zero information on it so far. > Does anyone know where I'd find a service manual or

Re: Floating point math in FORTRAN IV on PDP-8

On Wed, Sep 19, 2018, 19:46 Michael Zahorik wrote: > Kyle, I have not run my machine since March. Summer is car season. But I > thought that maybe I could run this little program quickly. My PDP8E > started up, loaded the RIM and SERIAL DISK then OS/8 ran. Everything looked > good, BUT..

Floating point math in FORTRAN IV on PDP-8

At VCF MW this past weekend, I was playing around with an FPP8/A stuffed into a PDP-8/M with a fan removed. This hex-wide two-board set will happily work in a quad-wide backplane, as it needs no signals that an 8/A would otherwise provide. I wanted to benchmark the FPP8/A with the software

Re: Unknown US manufacturer - try again

On Wed, Sep 12, 2018, 23:03 Kelly Leavitt via cctalk wrote: > Is that a Control Logic logo? page 3-34 of this document: > > > https://inis.iaea.org/collection/NCLCollectionStore/_Public/05/155/5155759.pdf Nice work, detective! Even has the same model number prefix on the card. Kyle > >

Re: VCF Midwest seller's experience?

On Wed, Aug 15, 2018 at 1:45 PM, John Foust via cctalk < cctalk@classiccmp.org> wrote: > > I'm thinking of reducing my collection by bringing items to VCF Midwest. > I attended once six or seven years ago. > > Of course a great deal depends on what I'm selling, so I'll build a list. > > Possibles

Re: Weird Lear-Siegler ADM-3A board

On Wed, Jun 6, 2018, 12:52 Eric Smith via cctalk wrote: > Sure, if you've got them handy, I'll try compiling them with FPC. Are you > willing to release them as open source? > > Do you have any actual NS405/NS455 code that would be of interest? > I have this development board with an NS405 on

Re: Motorola EXORciser M6800 System

On Tue, Jun 5, 2018 at 4:10 PM, Thomas B via cctech wrote: > > Now to my question. The vintage computer forum at > http://www.vcfed.org/forum/archive/index.php/t-44638.html mentioned some > interesting manuals. Archive.org has some manuals, Bitsaver does not have > manuals about the M6800

Re: Modifying microcode

On Wed, May 30, 2018 at 12:05 PM, Jon Elson wrote: > On 05/30/2018 08:19 AM, Kyle Owen via cctalk wrote: > >> >> I'm thinking about trying to find a microcoded architecture to play with >> before I design something around the Intel 3000 series. >> > Intel 3000

Re: Modifying microcode

On Wed, May 30, 2018 at 9:34 AM, Camiel Vanderhoeven < camiel.vanderhoe...@vmssoftware.com> wrote: > The microcode for the MicroVAX 2 (for which the MICRO2 assembler was used) > and the CVAX (which is the CPU in your 3800) is implemented as a mask ROM > on the CPU chip itself. No way to change

Re: Modifying microcode

On Wed, May 30, 2018 at 8:51 AM, Noel Chiappa via cctalk < cctalk@classiccmp.org> wrote: > > From: Kyle Owen > > > I do have an 11/45, though... so with this modification, I suppose > one > > could have some fun: > > That's for the -11/40 - very

Modifying microcode

Has anyone attempted to reassemble and update the microcode on a MicroVAX? Seems like there's enough stuff here to possibly do it: http://simh.trailing-edge.com/semi/ucode/ I'm thinking about trying to find a microcoded architecture to play with before I design something around the Intel 3000

Tennecomp

Al uploaded some of my Tennecomp docs onto Bitsavers: http://bitsavers.org/pdf/tennecomp/ He also already had some brochures, which are very interesting as well. Anyone else have some Tennecomp stuff? I've got more stuff to scan, including a bunch of schematics (size C paper, for the most part),

Re: Unknown CDC unit , looks like a drum memory ?

On Thu, May 17, 2018 at 9:11 AM, geneb via cctalk wrote: > On Thu, 17 May 2018, Christian Corti via cctalk wrote: > > On Wed, 16 May 2018, geneb wrote: >> >>> On Wed, 16 May 2018, Ed Sharpe via cctalk wrote: >>> >>> OK I see there is a mix of photos in this

Re: Intel 3000 series

On Fri, May 4, 2018 at 8:16 PM, dwight via cctalk wrote: > I'm not sure how much good a 2900 assembler would be for a 3000 series > part. The 2900 has an address controller more like a typical micro > computer, while the 3000 is more like playing a game of chess. > I can

Re: Intel 3000 series

On Fri, May 4, 2018 at 2:47 PM, Eric Smith wrote: > > Signetics also had a microassembler for the 3000 series, "Signetics Micro > Assembler", also written in FORTRAN, and not compatible with CROMIS. > Well, maybe that'll turn up if CROMIS doesn't. > > If CROMIS doesn't

Intel 3000 series

Does anyone have any software for developing for the Intel 3000 series? I bought some parts on eBay and am contemplating a bit-slice PDP-8 or DG Nova for fun. Bitsavers has some 3000 series manuals, but I can't seem to find any "bits" of software. Looks like CROMIS is the cross microprogram

GDB front-end for SimH

Has anyone made a GDB front-end for SimH? Just curious. Seems like it could be an interesting way to tie an IDE to SimH, if one were inclined. Thanks, Kyle

Re: Identifying an aluminum panel

The size is just large enough to fit in a 19" rack. It's also possible that I don't have what it goes to. Here are more panels to puzzle over: http://imgur.com/a/8nJ5I In related news, I am missing the bottom panels for an RK05J. Never got it with the unit I picked up, nor the cards. I've been

Identifying an aluminum panel

I feel like I should know what this panel goes to...I found it in my garage when cleaning up. Any ideas? http://i.imgur.com/u4LMNqE.jpg Thanks, Kyle

Identifying vacuum tube module

Anyone knows what these go to? https://imgur.com/a/CpxLs Thanks, Kyle

Re: Shipping a Flexowriter

Thank you for the compliments! I'm looking forward to getting it going. Any idea what the model (FIO) indicates? Trying to locate some repair manuals and tips. Anything else I should look for other than what's on Bitsavers? The unit powers up and types with a few keys slow to act or return.

Re: Shipping a Flexowriter

I ended up going with PakMail and was not disappointed. It arrived safe and sound yesterday, and though the cost of shipping was almost as much as the unit itself, I felt much better about paying a little more to make sure it arrived without damage. Pictures are here: https://imgur.com/a/xW480

Re: PDP8/e programmers consoles

On Fri, Mar 16, 2018, 20:58 allison via cctalk wrote: > On 03/16/2018 08:28 PM, Charles Dickman via cctalk wrote: > > So the PDP8/e used the KC8-EA programmers console which has > > incandescent indicator lamps and the PDP8/f used the KC8-FL > > programmers console which

Re: AlphaServers

So, B-Cache is a common failure; any idea what specifically is failing about it? I've got a 1000A, but its been years since I've tried booting it. It was successfully booting when I last tried it, however. I think I've got Tru64 installation media somewhere around here, too... Kyle

Re: AlphaServers

Several people have now mentioned they have dead Alphas. What is generally failing about them? Kyle

Is livingcomputers.org down?

I'm not able to load Living Computer's website. Anyone else? Kyle

Re: Shipping a Flexowriter

The more quotes I get regarding shipping, the more I'm thinking to just drive the 1300 miles (one way) and pick it up myself. I'd rather nothing bad happen to it, as insurance money can't replace the unit (easily). Any recommendations on finding a private carrier? It's in Colorado. Kyle

Shipping a Flexowriter

Does anyone have any tips on preparing a Flexowriter for shipping? Any thoughts as to crate vs. pallet? Thanks, Kyle

Re: Looking for Heath H-29 operation manual and schematic

On Feb 5, 2018 07:02, "dwight" wrote: I expect to be at the PNW VCF. If Al isn't going up there I can take them and give then to Al. We are in yelling distance ( almost ) of each other. Dwight Only issue is I'm already in Portland visiting other collectors before the

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