I built an Elf from the Popular Electronics 1976 article back in 1978 and around 1979 I added a hex key pad in place of the binary interface (I used a...
... heard from ... Yes to both. I found that with Video card the default IO was the video and it required the GPIO for the keyboard or I could not communicate ...
Ted, Quest and Netronics followed the PopTronics article by using a 74C922/923 keyboard encoder, along with a set of latches (74C173 or similar). The 74C923...
From what I can see from the schematic there is no auto load feature like I built. So you have to key in two hex digits, then hit the INPUT switch in order to...
Right you are. The Netronics hex keyboard had no way of telling you when a digit was pressed unless it happened to be different than the last two key presses....
LM3900 works as well. There is a March 1978 issue of Popular Electronics with the schematic that is the same as the VIP except that it uses a different...
I found the VIP schematics and see that they did something very similar to me in that they use /EF3 to detect a key press. Cool. My non-standard keyboard is...
Hey Ted, I for one like the Keypad auto load feature. I've got an old ET3400A (heathkit) with that feature and it makes entering programs much easier. Also...
I like the keypad auto load function too but one disadvantage if you happen to be clumsy like me is that mistakes are often costly time-wise. Some of the...
I'm never sure what to leave on the photo section when the copyright "venom" is flowing but here are a couple views of my leisure-time microcomputer systems....
Al, Looks great! Very professional looking ELF! I like the collection. I wish I had picked up an IMSAI when they were cheap. I cant justify that kind of...
Wo Hoo, After sourcing the bits, I have just completed my first ELF. I have tried to keep it along the same lines as the 1976 version, so now is the time to...
That's a nice looking ELF Doug! It has plenty of space and you did a neat wiring job. Congratulations! I don't know if you've seen Steve Gemeny's photo's in...
... Very nice, Doug. ... There were no standards, per se, but it wasn't uncommon to slap an 1861 PIXIE chip on the same board (after the 4th article in Popular...
Does anyone know of a source for the CDP1861? I've got all the parts I need to build an elf except for the pixie chip. I'm new to the list and apoligize if...
Hey Mike, I'm surprised nobody's answered you yet. There was a bunch of them purchased in bulk last year and I would have thought a few would still be kicking...
Ohh Ahh, I would also be very interested in one - I thought they simply didn't exist any more, and the only option was to use a hardware emulator such as the...
Hi all, I am the one who did a bulk buy on these last year. The response was pretty good but I do still have a small quantity left. I want to keep a few for my...
Hi Ray, Can I please reserve 2 devices - I live in Australia. I'll get a couple of $20 USD notes and mail it to you? What is your snail mail address? ...
original cosmac vip system manuals - games programs ext memory board tiny basic board 4k memory card ipso facto (canadian usergroup bulletins) ascii keyboard...
So how much is the shipping? I am interested, I dug out my old COSMAC stuff when I found my Elf in a storage locker I finally cleaned out and the bug hit me...
Thanks for your reply. I am located in Pickering, Ontario I retired in 1992 and I once built the Cosmac Elf that appeared in Popular Electronics. I would like...
Does anyone have a part number for the RCA video connector? I've tried everything in my junk box and even some I ordered from various places, but nothing...
Digikey # CP-1403-ND can be used. It is not an exact replacement, and requires modification of the center pin. I used a Dremel tool with a cutting disc to...
You are more handy than I am! I just bent the pin up and ran a stiff wire up to the pin and clipped it! Works fine though! Al Williams (the other Al W) ...
... I don't know about Digikey or Mouser connectors, because what I did was to buy a few tall yellow RCA PCB-mount connectors and cut them down. I would have...
Bob, I have the exact part, having bought it at Bob Armstrong's recommended shop. Please let me know your needs list -- I have dups of most of the parts that...
Thank you all for the inquiries... I have enough interest and am now in the decision process... I do not want to incur exspence or inconvenience...so this will...
tell me what you need moneywise.. for the stuff.. I will incur all expences.... if you want to just drop off the stuff to one of the package stores and let...
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