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Forum FAQ and Guidelines
#ThisGroup
This group has a FAQ and guidelines page of sorts on this group's Wiki at: *https://groups.io/g/cosmacelf/wiki/CosmacElfGroupFaq* Email users will find a link to this in the footer area of posted mess
This group has a FAQ and guidelines page of sorts on this group's Wiki at: *https://groups.io/g/cosmacelf/wiki/CosmacElfGroupFaq* Email users will find a link to this in the footer area of posted messages. To make this document more discoverable for those who use the groups.io web interface, this message is being posted as a "sticky" topic so that it appears at the top of the displayed list of messages.
By Dave Ruske
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Anyone done a modern memory makeover for Quest Super Elf? 75 messages
Looking for a cookbook approach (or close approximation) to going from 1/4 k up to 32k or preferably 64k of ram or ram/eprom-eeprom combo. Looking for the easiest way possible in the way of a build, s
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Looking for a cookbook approach (or close approximation) to going from 1/4 k up to 32k or preferably 64k of ram or ram/eprom-eeprom combo. Looking for the easiest way possible in the way of a build, s
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By Hank Riley
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cal: a Linux-style calendar utility for Elf/OS 2 messages
My first attempt at a non-trivial (more than reading the toggle switches and blinking the Q led) 1802 program (and also my first attempt at any Elf/OS programming) is working to the point where I thou
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My first attempt at a non-trivial (more than reading the toggle switches and blinking the Q led) 1802 program (and also my first attempt at any Elf/OS programming) is working to the point where I thou
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By Wayne Hortensius
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#rca1802 My quick test setup 13 messages
#rca1802
After being introduced to the CDP1802 via the GB3US repeater controller and spending time reading about some of the projects here, I realised I've missed out on all this COSMAC fun and I need to learn
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After being introduced to the CDP1802 via the GB3US repeater controller and spending time reading about some of the projects here, I realised I've missed out on all this COSMAC fun and I need to learn
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By Nick B.
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Undocumented instructions in 1804/5/6 5 messages
Hi all, I'm just getting my feet wet with the 18xx. In the course of learning about all the variations I had a question. The 1804/5/6 instructions use the otherwise "unused" opcode (0x68) to start all
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Hi all, I'm just getting my feet wet with the 18xx. In the course of learning about all the variations I had a question. The 1804/5/6 instructions use the otherwise "unused" opcode (0x68) to start all
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By wrcooke@...
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NOM Card For The 1802 3 messages
#Electronics
I have been looking for months now reading some old magazines like Radio Electronics and Popular Electronics (as well as some Byte, Kilobaud, etc as well) and found an article I never saw before. (yea
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I have been looking for months now reading some old magazines like Radio Electronics and Popular Electronics (as well as some Byte, Kilobaud, etc as well) and found an article I never saw before. (yea
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By Saturn5tony
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RCA SSD-280 LSI Products Databook 2 messages
While looking for something else I came across this manual on bitsavers. Wonder if it should be on the site with other 18xx documents? http://bitsavers.trailing-edge.com/components/rca/cosmac/SSD-280_
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While looking for something else I came across this manual on bitsavers. Wonder if it should be on the site with other 18xx documents? http://bitsavers.trailing-edge.com/components/rca/cosmac/SSD-280_
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By wrcooke@...
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Classic BASIC book gets a 2021 update 8 messages
Hi all, Hackaday had a story today on bringing one of the classic books of BASI programs from the 1970's into the present. https://hackaday.com/2021/02/26/the-famous-basic-computer-games-book-gets-a-2
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Hi all, Hackaday had a story today on bringing one of the classic books of BASI programs from the 1970's into the present. https://hackaday.com/2021/02/26/the-famous-basic-computer-games-book-gets-a-2
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By Lee Hart
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INS8073 29 messages
Hi, Some weeks back, there was a discussion about National Semiconductor micros. Since I never used them in my work designs, I decided to build one for myself. I was able to track down some INS8060 an
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Hi, Some weeks back, there was a discussion about National Semiconductor micros. Since I never used them in my work designs, I decided to build one for myself. I was able to track down some INS8060 an
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By Peter Renaud
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Replacement for Rc/Asm 45 messages
As my projects for the 1802 become larger and more complex, I am finding that I need more capabilities than what Rc/Asm is capable of, as such I have decided to write a new assembler system for the 18
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As my projects for the 1802 become larger and more complex, I am finding that I need more capabilities than what Rc/Asm is capable of, as such I have decided to write a new assembler system for the 18
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By Mike Riley
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Suggestions for EEPROM programmer 21 messages
Hi all, I've been using a Willem PCB3 dual power programmer for burning 27Cxxx chips for a long time and it works perfectly for that but it doesn't seem to want to program my AT28C256. My Willem Progr
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Hi all, I've been using a Willem PCB3 dual power programmer for burning 27Cxxx chips for a long time and it works perfectly for that but it doesn't seem to want to program my AT28C256. My Willem Progr
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By Andrew Wasson
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COMX PC1 9 messages
Hello, I've been looking for a while now, but I finally found a COMX PC1 computer. Marcel, with whom I've been working on projects for a while, sent me a message that one was available on eBay in the
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Hello, I've been looking for a while now, but I finally found a COMX PC1 computer. Marcel, with whom I've been working on projects for a while, sent me a message that one was available on eBay in the
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By ekeefe8051
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HDMI 3 messages
Hello 1802 people, does anyone know what it would take to make a converter for HDMI on a typical living room tv. The old uhf connection, originally came from a mono composite signal, or 3 of them for
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Hello 1802 people, does anyone know what it would take to make a converter for HDMI on a typical living room tv. The old uhf connection, originally came from a mono composite signal, or 3 of them for
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By John Gooch
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A breadboarded Pico Elf, IDE/uSD adapter, and *almost* there 29 messages
#ide
#Homebrew
#Pico-Elf-V2
I got the last part I needed to hook up an IDE/uSD adapter to my breadboarded Pico Elf today. And it mostly works. Kind of. But not quite. And I am sooo flailing a bit right now. At the moment, I have
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I got the last part I needed to hook up an IDE/uSD adapter to my breadboarded Pico Elf today. And it mostly works. Kind of. But not quite. And I am sooo flailing a bit right now. At the moment, I have
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By Wayne Hortensius
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PEV2 updates 13 messages
Hello all, Just a couple updates on a couple projects: 1. The standard functions library is near completion, since the last update I have added: sin, cos, tan, ln, e^x, x^y, and sqrt. By the end of to
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Hello all, Just a couple updates on a couple projects: 1. The standard functions library is near completion, since the last update I have added: sin, cos, tan, ln, e^x, x^y, and sqrt. By the end of to
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By Mike Riley
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CDP1802 Ham Radio Repeater controller 7 messages
Hi, I joined the group to find out a bit more about the CDP1802. Up until recently it was a processor I'd never heard of. I came across the CDP1802 in an amateur radio repeater controller project, the
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Hi, I joined the group to find out a bit more about the CDP1802. Up until recently it was a processor I'd never heard of. I came across the CDP1802 in an amateur radio repeater controller project, the
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By Nick B.
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Update on the reTIL project 3 messages
Here is an update from Alex on his reTIL project: https://twitter.com/tinyledmatrix/status/1363629782559313920 --- P. Todd Decker 913-284-8814
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Here is an update from Alex on his reTIL project: https://twitter.com/tinyledmatrix/status/1363629782559313920 --- P. Todd Decker 913-284-8814
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By P Todd Decker
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Quirk in rcasm? 10 messages
I ran into something odd with rcasm recently. Here's the code that demonstrates it: :~/tmp$ rcasm -l -v -x -d 1802 tst.asm --->>-d1802<< 1802 -> Native 2 Classes read. 237 Patterns read. 1 0000: 2 000
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I ran into something odd with rcasm recently. Here's the code that demonstrates it: :~/tmp$ rcasm -l -v -x -d 1802 tst.asm --->>-d1802<< 1802 -> Native 2 Classes read. 237 Patterns read. 1 0000: 2 000
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By Bob Kay
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Paul Robsons VIP Project 10 messages
#VIP
I've always loved Paul Robson's Vip Project, and always thought to myself, one day I will design a circuit board for this wonderful little Cosmac VIP emulator using nothing but an Arduino. :) Please l
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I've always loved Paul Robson's Vip Project, and always thought to myself, one day I will design a circuit board for this wonderful little Cosmac VIP emulator using nothing but an Arduino. :) Please l
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By waltermi@rogers.com
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File Notifications
#file-notice
The following files have been uploaded to the Files area of the cosmacelf@groups.io group. /MCDS System Board Manuals/MPM-201C User Manual for the CDP1802 COSMAC Microprocessor.pdf By: @HamHack <dalet
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The following files have been uploaded to the Files area of the cosmacelf@groups.io group. /MCDS System Board Manuals/MPM-201C User Manual for the CDP1802 COSMAC Microprocessor.pdf By: @HamHack <dalet
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cosmacelf@groups.io Notification
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