Friday, April 30, 2010

RS-232 / Keyboard Interface Assembly - Working!

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The image above shows the first sign of life for this PS2 keyboard interface to an Apple-1 Obtronix. It worked the first time, no problems ...
Tuesday, April 20, 2010

RS-232 / Keyboard Interface Assembly

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PS-2/RS232 to ASCII Keyboard Adapter Assembly (designed by Mike Willegal) I spent about an hour assembling the adapter PCB tonite. I took m...
1 comment:
Sunday, April 18, 2010

Completed Mimeo by Cameron Cooper

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Saturday, April 17, 2010

PS2/RS-232 to ASCII Keyboard Adapter cont'd

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After reading the instruction pamphlet, I measured, cut and stripped the jumper wires. I decided I wanted to solder these first, before sol...
Monday, April 12, 2010

PS2/RS-232 to ASCII Keyboard Adapter

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Mike Willegal has done it again. I mentioned awhile back, while working on my A-1 BASIC firmware card, that my Apple II keyboard stopped wo...
Saturday, April 3, 2010

Wow! New Apple-1 Memory Test Utility...

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Can't get into the Monitor? Tired of RAM chip swapping? Check out Mike Willegal's Apple-1 Memory test utility!

Comparison: Mimeo PCB to Obtronix PCB

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Mike Willegal's Mimeo is on the left, underneath Stephen Gabaly's Obtronix board on the right. The inset is an original Apple-1. Asi...

Mike Wllegal's Mimeo

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2 Mimeo boards end to end, front and back.

Obtronix Apple-1 Reproduction Kit Instructions

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These kits came with instruction sheets. My first kit did not, but I was able to find the instructions on the internet. (They were posted ...

Obtronix Apple-1 Active Parts Kit (chips & regulators)

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1 comment:

Obtronix Apple-1 Reproduction Kits

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2 Obtronix kits crammed into one box (as I received them). One bag of parts omitted in the photo as I put them in another box for obvious r...
Wednesday, March 31, 2010

Apple 1 Cassette Interface Kits

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These kits are made by Obtronix. These appear to be very nice quality. I will be replacing the plastic A3 and A4 PROM chips with 6301-1J ce...
Wednesday, March 24, 2010

Another very nice Apple-1 sold on ebay yesterday

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Here is the full description from the auction: Apple 1 - ORIGINAL, with Keyboard, RF Modulator, Cassette Interface Card and Tapes The offe...
Saturday, March 20, 2010

The Mimeo 1 - Mike Willegal's beautiful PCB

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Mike did a beautiful job laying out this board -- based on images of the original Apple-1. This probably wasn't an easy task. Very ni...
5 comments:
Sunday, March 14, 2010

6820 PIA - AMI and other hard-to-find chips from 1976

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UPDATE May.21.2010 - 6820L (A little easier to find than the AMI) 2513 (All of the above are programmed with other-than, Apple-1 character s...
3 comments:

Giant on a board, the Orange 1

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Interface Age, July 1976 (I was tipped off by Cameron Cooper about this article)

The "Woz bible" - Small Computer Handbook 1967

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I'm not 100% sure about this.... but Woz referred to a "book on computers" as his Bible in the 1996 documentary film, "Tr...
Saturday, March 13, 2010

Floppy drive, early (Apple II) schematics, and stuff hand-wired by Woz

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Wendell Sander informs us of some very interesting items going up for sale in the near future, you are not going to want to miss this: ...