Just free-wheelin' here... So, to go step further, how about using a Raspberry Pi or Arduino with the MCDS? It could replace the tape I/O completely by using analog to digital conversion of the tape o

Does anyone happen to have one of David Madole's Quest Super Elf recreation boards that they would be willing to sell? I'm in Texas so probably US residents only! Thanks!

The original VP-111 and VP-711 COSMAC VIP's and the CDP18S692, CDP18S693, CDP18S694and CDP18S695 Microboard Development Systems (MCDS), as well as the CDP18S020 COSMAC Evaluation Kt all used Tape I/O

Subject: CDP1861 replacement circuit For all who may be curious about the developments of this project. I have posted a schematic, a HEX file, and an info file for your reading enjoyment. These files

Hi there, I will appreciate if you can help confirm/debug an unexpected (to me) 1802 behavior after it comes out of reset. Background: I'm building a bunch of 8-bit microprocessor boards for Arduino M

Crossbow Development System dates back to 1996. It ran on "Classic Macs" up to OS9. It ran on PowerPC Macs in Classic emulation. When the new Intel-based Macs arrived, Apple dropped support for Classi

Hi All, Tonight I was clearing out a cupboard so we can use it to store camping equipment. I found an old Cadbury's Roses chocolates tin with an assortment of ICs (sadly no chocolates) in it. These in

I'm slowly relearning about the VIP. It's been languishing in storage for a long time. Do we have a disassembled/commented version of the VIP Monitor/OS anywhere? This is the VIP's on-board ROM. The m

Josh recently mentioned VCF MW in September, and reminded me that, once again, VCF West is also coming around beginning of this August at the Computer History Museum in Mountain View, CA. Are any list

This is a three-ROM set CDP18S024. Hoping we can find a set and backup the ROMs to our files section. Contains the Editor, Debugger and Assembler for the COSMAC Evaluation Kit, and was also used in th

Okay, Herb and any who have experience compiling A18. I managed to figure out that I could compile under XCODE or in the Terminal app (Mac's Command Line) using gcc. So it's essentially a Linux (Darwi

What - if any - BUS standard do RCA Microboards (Microboard Universal Backplane) follow? Specifications: "Size: 4.5 inches x 7.5 inches (114.3 mm x 190.5 mm) Backplane Connector: edge fingers, 44 pins

Has anyone used/tested the A18 Cross Assembler on the MAC with DOSBOX for OS/10? Is so, what's the verdict? I was used to Crossbow on the older, PowerPC Mac, but there is no version for the new Intel

While looking through the manual for the CDP81S651 floppy disk controller card I noticed some mentions of the Z80. Then there was a monitor program (UT80) I hadn't heard of. Google revealed: https://k

Cross-post:

Even though some systems are getting shut down on Voyager 1... I would imagine it's 1802 (perhaps multiple?) is still crunching away! -- Tim Stoddard "Life with technology: It's a roller coaster ride!

My brother got a new toy. We took an image of my house breaker panel. Then I got an idea. I powered up the Frankenstein board and shot this. Now the glow of the six TIL311 displays is understandably s

We've seen a few projects with the Elf, and Ed Keefe's updates on the VIP II. And the Membership Card version. Got me to thinking about a few things. I'd like to add modern tech in one or two boards t

Hi All, Have not visited in quite a while now but have had some health issues keeping me a bit preoccupied. I am thinning out my Cosmac stuff so others can have a go at it. I got two NOS unused Quest

Hi Folks, I earned money by mowing lawns and raking leaves in 1980 and bought the Elf II kit. I soldered it myself and powered it with a home brew full wave rectifier power supply. I added the cassett