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PostPosted: Mon Feb 06, 2017 7:58 pm 
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Here's the roundup of our posts for January. Comments welcome on this thread! Check the original posts on gplus for comments too. (See also our previous roundups and our profile page - or look here.)

2017-01-06 the story of a TIM, by Joseph Watson - from 1975, about as early as you can get, and the earliest 6502-based kit computer design.

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2017-01-13 - a portable 6502 computer, in the form of a KIM-1 in a briefcase, with tape storage built in. This photo from VCF SW 3.0 in Arlington.

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2017-01-22 - a reboot of PLASMA, a virtual machine for c-like programming on 6502.

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2017-01-27 - a 1k chess, and a 256 byte Pong, both for the 2600 aka VCS.

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Last edited by BigEd on Sun Aug 20, 2017 8:52 pm, edited 4 times in total.

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PostPosted: Mon Feb 06, 2017 8:06 pm 
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BigEd wrote:
2017-01-13 - a portable 6502 computer, in the form of a KIM-1 in a briefcase, with tape storage built in. This photo from VCF SW 3.0 in Arlington.

I sure got a laugh from all those heat sinks on the board with the extra memory. And how much memory was there?? :lol:

My parents had that model of cassette machine too.

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PostPosted: Mon Feb 06, 2017 8:10 pm 
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Hmm, those heatsinks - perhaps that's four locally-regulated power rails?
(Edit: RAMs are Signetics 21L02, about 30mA supply current each, single 5V rail. That's 1kbit per chip, 24 chips present with room for 8 more. So that's 3kbytes, nearly 4 Watts.)

Huge version of the briefcase KIM photo is here:
https://www.flickr.com/photos/85127208@ ... 0/sizes/o/

Edit: and more nearby:
https://www.flickr.com/photos/85127208@ ... 1106450588


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PostPosted: Mon Feb 06, 2017 8:39 pm 
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BigEd wrote:
Hmm, those heatsinks - perhaps that's four locally-regulated power rails?

They appear to be regulators, so your guess is probably correct. The need for those regulators should tell you how power-hungry those RAMs are.

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PostPosted: Tue Mar 07, 2017 10:21 pm 
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Here's the roundup of our posts for February. Comments welcome on this thread! Check the original posts on gplus for comments too. (See also our previous roundups and our profile page.)

2017-02-05 - a very neat embedded emulation of the KIM-1 from Mats Engstrom, using a surface mount AVR chip and not much else.

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2017-02-10 - a collection of in-browser IDEs from the catalogue at http://6502.org/tools/asm/#web

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2017-02-17 - A self-contained portable conversion of Acorn's Master Compact, using a tiny LCD display.

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2017-02-26 - the 6502 acts as a GPU for the Visual 1050, a Z80-based CP/M machine.

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Last edited by BigEd on Fri Apr 16, 2021 2:56 pm, edited 3 times in total.

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PostPosted: Tue Apr 04, 2017 8:00 pm 
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Here's the roundup of our posts for March. Comments welcome on this thread! Check the original posts on gplus for comments too. (See also our previous roundups and our profile page - or look here.)

2017-03-03 - a 3D library from 1994 by Nick Jameson, rediscovered and republished on GitHub, with an in-browser demo.
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2017-03-10 - laser-cut 6502 in acrylic by Chris Smith (as seen in this thread)

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2017-03-17 - some modern homebrew software, for Atari, Apple, and Oric

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