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Where order CDP1802 chip

(3)
Hi Carlitos, Well, you definitely came to the right group.... I believe I have about 20 or 30 chips on hand. but Lee should have much more than me. I'm sure
joshbensadon
3
posts
7:27 PM

Calling subroutines inside an interrupt routine

(7)
Thanks to the "Ideas Book" (RCA Europe) I got this working! I modified/expanded it to work with the 1877 PIC. The code is attached. It basically uses R7 to do
mark.bielman
7
posts
May 15

cdp1877 Priority Interrupt Controller

(18)
... There's an interesting technique that I saw used on a Godbout S-100 card with the 8080 CPU. It adds a memory chip that is used exclusively for the
Lee Hart
18
posts
May 11

OTish S-100 Back Plane

(10)
Lee is being humble, in his descriptions of the IDIOT monitor. It took me time to appreciate it. First, it's relocatable - no long jumps - so the 512-byte
thinkpast
10
posts
May 8

VCF-East 10.0 and COSMAC

(7)
Lee suggested old bipolar PROMS with narrow packages. But, they are often low capacity, 256 bytes or less; programmers are nonexistent (you essentially blow
thinkpast
7
posts
May 6

New file uploaded to cosmacelf

(383)
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the cosmacelf group. File : /VIS -
cosmacelf@yahoogroups.com
383
posts
May 3

1802 test circuit

(3)
Yes, cathodes to MA0-7, anodes to vcc I wasn't holding reset on power up.... Sent on the new Sprint Network from my Samsung Galaxy S®4. -------- Original
John O'Brien
3
posts
May 2

Spare timeGizmos Elf 2000 Boards Available?

(26)
Hi Patrick From recent posts, the answer is YES. You have two choices. Either contact Flash or Bob. I believe Flash is selling whole kits, while Bob is
joshbensadon
26
posts
May 1

Olduino Carbot and Wireless Programming

(6)
Hi Bill, It looked pretty good navigating that box in the video. I didÆt expect it to be any more precise at dealing with 90 degree corners. I know exactly
Andrew Wasson
6
posts
Apr 30

MOPAR and the 1802

(33)
I found these Electronic Goldmine - Beautiful Large Steel Project Box http://www.goldmine-elec-products.com/prodinfo.asp?number=G20664
urrossum@att.net
33
posts
Apr 28

COSMAC ELF Website Maintenance

(8)
... Yeah, the Flickr doodad links take you directly to Flickr… about the only thing I could do would be to open a new browser window (which some browsers
Dave Ruske
8
posts
Apr 27

Quick Project Help for an Exhibit

(22)
Excellent, thanks for sharing.
bill rowe
22
posts
Apr 23

VIP Users - I need SW Help?

(8)
Great fun. The COSMAC helped launch my 30+ year career as an Engineer. I got to use 1802s on two projects, but both as an undergraduate. I will see if I can
sbotts@att.net
8
posts
Apr 14

Any IRC Channels

(7)
... Yes, that's exactly what I was thinking it must be. As far as I know, all the old IRC chat rooms are long dead. From the tone of the email, I assumed it
Lee Hart
7
posts
Apr 12

OT Burroughs TD700

(8)
Most of the manuals that have "bitsavers" in the URL, are available also at bitsavers.org -- that is where archive.org is getting those particular manuals. On
Charles Richmond
8
posts
Apr 3
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