Re: Homebrew STG card

[stratton-at-mdc.net]

> In the mean time, I was going to use the designs by Tom Kulaga as a starting
> point. Map one or two 8255 chips into LPT3, and use 0x300 to 0x31F for the
> analog IO. If needed, maybe mapping the LS7266 into the same area.
> Connecting to the outside world, I would envisage possibly using 9 pin D
> connectors for the encoders pin compatable with the Heidenain scales. Analog IO
> on a seperate 26 pin D connector and the digital IO on a 50 way box header.
> This way, if anyone wanted to start with just a stepper system with a clear
> path to a full blown servo control, all they would need to do is to plug in the
> missing chips and hook up the cables.
> 

Sounds good.  Only suggestion would be to make the addressing jumper
selectable if/when you do pc boards - not everyone's computer has
the same configuration.

Chris

-- 
Christopher C. Stratton, stratton-at-mdc.net
Instrument Maker, Horn Player & Engineer
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