Santo Nucifora

Was searching for an IC in my pile and noticed this. There's a little Intel "i" (circled in red) within the pin 1 side marking of this chip with gold legs. "1802-0775" is an HP house marking for Intel's first 1103 dynamic RAM chip. Never seen this little "i" before. #retrocomputing #Intel

Back when portable computers were being transformed into purpose-built device, this is an Epson HX-40 (PX-4) with a spectrum analyzer "backpack" added on making it an Ivie PC-40. It holds multiple boards and a large battery. I am sure there were a lot of device like this. #retrocomputing

I got my DEC Rainbow 100 running and after a restoration on the unique RX50 dual disk drive. Happy to see my VR201 monitor was fine. I made some floppies and booted up MS-DOS 2.05 and CP/M-86. Here it is booting up MS-DOS. An interesting computer for it's time. #retrocomputing #vintagecomputer

Finally landed a CMD FD-2000 3.5" floppy drive for my Commodore 64. It was a "grail" item for me for a long time but was out of reach in terms what these fetch on the market vs what I would be willing to pay. Love the original Creative Micro Design products. #Commodore #CMD #retrocomputing

Finally got an Amstrad PPC640 computer. It's a neat portable computer but the screen is not great. That, however, was to be expected. Interesting form factor and while it has a battery compartment ("C" cell), it's not practical as it doesn't last long . It's more of a "luggable". #retrocomputing

Had my IBM 7690 Nursing Workstations out today. Being a PS/2 (Model 30ish), both needed floppy drive recapping. Normally mounted on the wall with the cables connected from the bottom, I propped one up to run. These have a touch screen LCD screen. #vintagecomputer #retrocomputing #IBMPS2

Had an HP 9830A calculator/computer for 10 years and it never worked. Found another and got it yesterday. It also didn't work but with board swapping, it had one bad board. After board swapping, the original had 4 bad boards. Further repairs in my future. #vintagecomputer #retrocomputing

Very excited about my latest acquisition. A Gravis Ultrasound ACE (Audio Card Enhancer) that I don't think has ever been used. Now I need to create a 486 era PC with some interesting audio/video cards in it :) #vintagecomputer #retrocomputing

Just got my MITS Altair 680. It's a little smaller than I thought. Next to the 8800, it looks tiny. Glad it works. Had to fix my LSI ADM-3A though. The contrast knob is very touchy. I'll need to replace that. #retrocomputing #vintagecomputer

Recent acquisition. First ever CD-ROM drive was the Philips CM100. It had a proprietary LMSI interface. The Philips CM110 shown here is the SCSI counterpart. I believe this may be the first SCSI CD-ROM drive. Don't know is if they came out at the same time or if SCSI was later? #retrocomputing

I've had this NEC Trek PC-6001A computer for years but never took it out of the shipping box. I remember it having chicklet keys and the tape player but it turns out, it had the PC-6021A thermal printer. No cable though :( It's Centronics 14 pin to 36 pin. Will never find that. #retrocomputing

Finally tracked down a Commodore VIC-1605 VicModem phone adapter used here in Canada. This came in the Viccessories package that included the 1600 VicModem and the original Commodore phone. Still on the hunt for one in a box but that is unlikely to find anymore. #retrocomputing #vintagecomputer

With a small collection of "luggable" computers, I just acquired a Panasonic Sr Partner with dual 360K floppy drives running MS-DOS 2.11. I think this might be the heaviest luggable I own and I do have an IBM Portable Personal computer (Model 5155) too.

Got the BeBox out for a regular run to make sure everything is still okay. Love this thing. #retrocomputing #vintagecomputer

Needed to make a ribbon cable for connecting a floppy drive to a Lobos Max-80 I was testing. It's a bit strange. If it does not boot up, you get a beep but absolutely no video output. This is supposed to be a TRS-80 clone. #retrocomputing #vintagecomputer.

I've been making my own ribbon cables for a while now and once I found this "ribbon cable tester" online, I LOVE it! No more multimeter continuity testing on each pin to troubleshoot. I had the edge connector ends already so I can test floppy ribbon cables. #retrocomputing #vintagecomputer

Don't forget if you're interested. Today at 1PM Eastern.

Lee Felsenstein livestream Sun. June 14 at 1PM (Eastern): youtube.com/live/Js6R3OI... Before the laptop, before Apple took off, there was the Legendary moderator of the Homebrew Computer Club and designer of the Osborne 1. Don't miss our exclusive livestream with a true PC pioneer this Sunday!

Dug out my two Kaypro 2000s last night. Plugged them in. The earlier vertically "narrow" screen model works fine even with long time dead batteries. The later "wide" screen model Kaypro 2000 does not work :( <sarcasm>I needed another project</sarcasm>. #retrocomputing #vintagecomputer

A post of my findings on the PicDisc CP/M System for the Olivetti M10. It is pretty awesome. vintagecomputer.ca/picdisc/ #retrocomputing #vintagecomputer

Recently acquired an Olivetti M10 and PicDisc unit that turns the M10 into a CP/M computer. Had to replace the 12VDC lead acid battery and a bad diode. If anyone has any software or docs on the PicDisc system, please let me know. Still trying to figure this out. #retrocomputing #vintagecomputer

Working with my MCM/70 and MCM/900 today. The '900 is two generations newer than the '70. Both run APL but have different displays. My dual 8" disk drive for the '900 needs work (blows fuses). After a week of messing around it's away until next time I take a shot. #retrocomputer #vintagecomputer

It's not the most exciting find but I'm an Apple Lisa fan so these brochures (two of the Lisa 1) I acquired are pretty cool to me. #AppleLisa #retrocomputing #vintagecomputer

A recent acquisition of mine is a Digital Equipment DECTalk DTC07B speech synthesis card. Works really well. This is the "shorter" newer surface mount version of the original DTC07 card and works much like the very original DECTalk DTC01 in PC ISA card format. #retrocomputing #vintagecomputing

The Jupiter Ace 4000 - the rare North American version of a computer built by two ex-ZX Spectrum designers who chose Forth over BASIC. Stronger case, ROM-deselect feature, and a fascinating history. vintagecomputer.ca/jupiter-ace-4000/

One project is to further explore one of the top tier computers in my collection, the Canadian MCM/70. An Intel 8008 based personal computer with built-in APL from 1974. Here I am initializing special NOS data cassettes I found and bought new lead-acid batteries. #retrocomputing #vintagecomputer

Got my copy yesterday as well. Can't wait to dig in. #vintagecomputer #retrocomputing

Listening to Episode 178 "The Programma 101". www.youtube.com/watch?v=5lpc... I listen while working on #vintagecomputer restoration. This Olivetti P101 still needs work. Being both digital logic and mechanical moving parts they are tough to work on. Thnx @adventofcomp.bsky.social #retrocomputing

Did some restoration work on this Teletype Model 43 ASR and rarer companion paper tape punch/reader. I still have one issue with the punch in that it punches one bit always but the chips internally are rare enough that it's good enough for now. Next time. #retrocomputing #vintagecomputer

Had to take a picture of "the boys" while they were out for #Marchintosh On the left is the Macintosh Quadra 950 running System 7.5.5 and on the right is the Macintosh Workgroup Server 95 running A/UX 3.1 #vintagecomputer #retrocomputing

I know, kinda "geeky" but I'm excited about finding this Teletype Model 43. I previously acquired the matching M43 paper tape punch/reader. This model, has the "Aux" port for the M43. Got the GNT 3601 paper punch in the deal. Like used together. Needs cleaning. #vintagecomputer #retrocomputer

As I go through some Macintoshes for #Marchintosh, these Sony Mac floppy drive gears are going to be the death of me. Ordered a 12 pack off of eBay. Let's hope I can get these back together again because the clips that hold on the back plate are super brittle. #vintagecomputer #retrocomputer.