From time to time I ask GOOGLE what is available on 1802, it was such a clean processor. When I read all of these emails here I thought some of the material I...
139
allenbsf6502
sfbong@...
Jun 3, 2002 11:28 am
... RAM ... 2114s, ... There was a nice 2-part article describing building a microprocessor development system using the CDP1802 in the April/May 1992 issue of...
... I still have lots of genuine RCA MWS5114E3 1kx4 CMOS RAMs (their version of the 2114) and RCA MWS5101LA3 256x4 CMOS RAMs if anyone is interested. Free for...
I added issues 8 - 12, of the Questdata newsletter to my MSN website today. Volume 1 is now completly online. Please note that issue 12 is missing the first 8...
I've posted the remaining issues of the Questdata newsletter (that I have) online at my MSN site. Here is the link to the page where you can access them: ...
Thanks for taking the time to share these newsletters with the group. They are rare items and contain lots of creative ideas. I printed hard copies so that I...
Tom Pittman's "A Short Course in Programming" taught 1802 machine language and microprocessor concepts from the ground up. I've long wanted to get this book...
You are welcome. I hope that posting the information will help keep it from being lost forever. Too much of the early days of microcomputing has been lost...
Can anyone verify if old magazine articles are free of copywrite restrictions?I still have some old BYTE magazines that contains COSMAC(I too was an early...
... Copyrights were intended to expire, according to the framers of our original constitution. However, current law leans toward maintaining them forever. So...
Around the time I built the Netronics Cosmac Elf II, there was a 4-bit microcomputer advertisement. I remember seeing the ads, and received the information in...
... There were (and still are) lots of 4-bit micros. They are mainly used in calculators and other small dedicated applications. I've done quite a few project...
I've scanned in the article "Now you can Build Microprocessor Projects Using an Inexpensive Product Development System" (Part II) by George Meyerle in the...
That's a little too large to host on cosmacelf.com, I'm afraid. But even if the article was converted to HTML, I'd still need the permission of Poptronics...
... Yeah, that's why I thought I'd ask first. ... I've uploaded the files to my website for a short period. I will host them for one week (until 20 July 2002)....
158
Philip Pemberton
philpem@...
Jul 14, 2002 6:51 am
Hi, I've just been going through my junk... er... quality used parts box and I've found a CDP1806 CPU. Can I use this in place of the 1802 on an Elf? I'm...
... Not quite. While the 1805/1806 instruction sets are compatible with the 1802, with a counter/timer added (and RAM for the 1805), neither support the LOAD ...
... I took a look. Interesting; I hadn't seen this article before. One problem I had; the files are huge! Not just in disk space and download time, but also...
... normal ... read ... O.K. I've put smaller files online. They're about 1/4 the file size and 1/2 the image size. I don't think I could go any smaller...
162
Gemeny, Steve
Steve.Gemeny@...
Jul 15, 2002 1:27 pm
Phil, My personal experience with a self built ELF (1978 and 2002) is this: The switch register is all you need to debug the display and most of the decoder...
... Thanks! They load and display just fine on my computer, and are perfectly readable. When I print them, the image is a bit small (6.25" x 8.5"), but...
I'm interested in upgrading my Netronics Cosmac Elf II so it can start up with Tom Pittman's Tiny Basic, without loading the tape. The computer has the full 4K...
165
Gemeny, Steve
Steve.Gemeny@...
Jul 16, 2002 2:10 pm
I've done a similar thing with my Quest Super ELF. My system was configured with Quest ROM Monitor located at 8000 and Tiny Basic at 8400. I found that the...
... I think the best way is to burn Tiny BASIC into an EPROM, and wire it up on a plug-in card. That way, it's there instantly when power is turned on (no tape...
167
Gemeny, Steve
Steve.Gemeny@...
Jul 16, 2002 5:56 pm
Mike, Lee's recommendation is basically the only way to make it work. As always, the devil's in the details... or in this case, the I/O routine. Tiny doesn't...
