Boy - someone else who knew/worked with the 1800 series of cpu's! My first computer was 1802 based on the article (with a couple of other follow up articles) in Popular Electronics. I still have the original magazine!. My wife gave me the parts for Christmas of 1976. The box had switches for inputting data - later I added a hex keypad. I thought I reached heaven when I added an ASR-33 teletype. I developed and built several data collection devices for the medical reference lab I worked for. By the end of the projects the series had moved up to the 1805 with a blazing 5 MHz clock. RCA came out with a hardware multiply/divide chip. With my first company project I was able to purchase a 2 pass, cassette based assembler. The first few weeks of trying to use it I thought it was the most cumbersome way to work. I could write a program much faster in the machine code than the assembler. Eventually I did learn to use and even like an assembler. I continued to use the 1805 with my last project in the early 90's. David V. Fansler Network Administrator TriPath Imaging, Inc. (formerly AutoCyte, Inc.) 1-800-426-2176 ext 261 Now Showing www.dv-fansler.com Ann Fansler (December 1, 1956 - September 23, 2000) -----Original Message----- From: Wynn Rostek [mailto:wynnr@GOLDENPRS.COM] Sent: Monday, January 22, 2001 9:15 AM To: PICLIST@MITVMA.MIT.EDU Subject: Re: [OT] Website? > Was wondering if you had a website as it would be neat to see some of the > stuff you've done. > I've been into the hobby almost as long (late '70s), I remember the S-100s, > the Altairs and Imsai-8008s (or were they 8080s?). > > My first computer was an "Elf" based on the RCA Cosmac 1802, purchased mail > order from the back of one of the old Popular/Radio Electronics rags... > > One more note on old time systems: I live in southern NH and occasionally > visit Boston, sometimes for the "Computer Museum." They have an Arithmetic > Logic Unit from one of the old NORAD early warning systems (would calculate > intercept vectors, etc.) - it is larger than a small house! Bruce, Altairs, Imais, don't forget the Sols. I had a COSMAC ELF too. the 1802 was a very interesting machine. I liked the way you could switch which register was used as the stack pointer, etc. This made it a very powerful machine for its time. That and the low power drain was likely the reason why it was the space platform CPU choice well into the 80's. A very neat little arcitecture. Rad hard versions went a long way towards keeping the CPU in production and winning design ins for a full two decades. I wonder if any other micro will ever do as well? I've never been to New England, but some summer I'd love to take in Mystic (I have a thing for old wooden sailboats, Catboats in particular having owned two.) and a run to Boston to take in the Computer Museum sounds like it would be in order if I ever pull it off. Thanks. Yes I have a web site. It is mostly a collection of links that I put together for friends. I did have three projects up, but after some housecleaning, there are only two there now. the URL is http://www5.palmnet.net/~war. Under Electronics/DSP Links/Source Code and Electronics/DSP Links/Filter program is a program from when I was teaching myself Visual C++ and Digital Signal processing. It's a program to design digital filters using fourier series analysis. The other one out there is under Computing/Microcontrollers/Accurate 1000 day countdown timer. It's a PIC project to drive an LCD acting as a long duration countdown clock. There are several other projects that have been up at one time or another, but everytime I changed ISPs, I did a new web page and picked a different 2 or 3 projects. Well the code may come flying out of the fingers, but you should see how long it takes me to get hardware wired up and going. Luckily we have somebody here that can whip a new circuit together in a few minutes so between the two of us, things actually get done... Wynn (Still has most of his fingers) Rostek -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads