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After successfully compiling and running a hello world assembly program on TOPS20, I tried something a bit more complicated: TITLE HACK SEARCH MONSYM HACK: SKIPA 4,[^D4] HACK0: SOJL 4,TRAILL SETZB 1,3 HACK1: TLNE 1,777777 JRST HACK0 MOVE 2,1...

I still have lots of P112 kits available for sale. See http://661.org/p112/ A P112 is a single-board computer that you solder together yourself. It provides a Z180 CPU, floppy drive ports, RTC, serial ports, a parallel port, and stackable expansion slot. It's capable of running regular CP/M...

The later editions of Briel's micro-Altair come with an unpainted stripe along the bottom of the front panel. In this area is a sticker reading "Briel Computers Altair 8800micro COMPUTER". I recently discovered that the laser cutter at my local hackerspace can be used to engrave and blacken...

I still have a bunch of P112 computer kits available. What is this? It's a semi-complete kit that yields a computer nominally running CP/M or similar operating systems. You get a PCB with the CPU (a Zilog Z180) and Super-IO chips already mounted. The rest of the parts are through-hole for...

I'm in the process of restoring a Compaq Portable. One thing it's missing is the brightness knob. Does anyone here have one to spare, sell, or trade?

As an exercise in learning KiCAD, I decided to reimplement James Pearce's 1-megabyte ISA memory board. Aside from learning KiCAD, my desires for this project are to rework the board so it uses a standard bracket, find someone to make it with hard gold fingers, and shoehorn in the circuitry of...

I'm now ready to take orders for P112 kits from people who didn't get onboard the Kickstarter project. For a complete kit (board and all parts that solder or plug into it), the cost is $200 to addresses inside the US $215 outside the US. If you want one, go to http://661.org/p112 and push...

Since I ran out of P112 kits last year, I've been asked multiple times to produce more. The critical thing in doing this is financing the project. So, I've set up a Kickstarter.com project to get things going. There are some differences in the kits this time round. The big one is that I'm no...

Does someone out there have a front panel from a pdp 11/70 with the white bezel for sale or trade? I'm looking for the standard red and purple color scheme, not the decdatasystems or csi variants.