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WOSP Brain Board

I built a board for the Mega8 chip for the WOSP on Saturday. I didn't have a 28 pin socket, so I used a 20 pin socket and an 8 pin socket. The chip fit, so I'm going to go ahead with it. I didn't realize that the power connections on the mega8 are in the center of the chip. I thought they would be pin 14 and pin 28 like the smaller chips. Lucky for me I was just putting headers on the board, didn't have too much rework. I'll use the crystal I just got from Spark Fun for the clock on this board. It will have a serial connection to the host computer, and a SPI connection to the display board and the target chip.

I want to add a 7 segment LED 'sector indicator' to the project, not sure where that will fit in.

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ATtiny2313 on the WOSP

Added a microchip to the Way Old-School Programmer. I flashed the program to the 2313 using my Arduino and a custom program. I send lines from the Intel SRecord (hex) file to arduino, it writes the bytes over the SPI interface to the 2313.

The first program ran the two LED banks on the same data (an incremented register). I had all kinds of noise on the board, lights that wouldn't light up, lights that were always on, and so on. Even the reset switch was faulty. It was all cold-soldier joints. Once I got that sorted out it started working like a charm.

Did a few revs of the software, the current one counts up on the yellow LED bank and lights all the lights from right to left on the red bank. Fun to watch...

My next step is to get serial comms working with the USB port (CP2021 breakout from Then I can work on the input stages.

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Welcome Makers!

Thanks to P. Torrone my Way Old-School Programmer is on the Make Magazine Blog.

WOSP Postings

Arduino Postings

Thanks for stopping by,

rsbohn (?) gmail dot com

P. S. The WOSP project is on hold; I'm building some Christmas presents.

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7606 days of detection
mod: 12/3/08, 5:42 AM

days of detection

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Randall Bohn lives in Orem, Utah, USA. He works as a Software Quality Engineer. He is a big fan of the AVR line of microcontrollers. He has been in the computer industry since 1989. Randall is married and has three children.

rsbohn can be reached via

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June 2023
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