homebrew 'puter project (was: 8008?
cclist at sydex.com
Wed Nov 16 14:13:15 CST 2005
On 11/16/2005 at 1:34 PM Allison wrote:
>Unless it gets crazy I tend to do that. Create a parallel interface with
>a protocal to talk over it to a slave and let the slave do the grunt work.
>Did that back around 81 for the first time using 8085 and 8035 and found
>it nice to have a limited IO on the host yet get good performance. Now
>with AVR, PIC and others it's pretty reasonable. Just let it interrupt
>the host when there's something for it or when done.
Of course, since a PC has all of the I/O support needed, one could simply
let it be the I/O servicer.
That way, if a problem with the homebrew box came up, the homebrew hardware
could be emulated on the PC. One could even cut down on construction and
debugging time by simply sticking the necessary components into a
prototyping PCB, skipping the nasty wiring stage just adding an illuminated
LED on the board (blink if you want) and emulate the whole lashup on the
Sort of like sitting behind the wheel of a car with the engine turned off,
saying "vroom, vrooooom".
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