CS/A65 PETIO
This board implements Commodore PET compatible
I/O interfaces. This includes the keyboard, IEEE488,
userport (mostly) and tape ports. It adds the functionality
that the IEEE488 bus can also be used as a device.
Status: untested
Notes
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This board has an additional diode (e.g. 1N4148) to
accomodate for the
WDC65SC22's totem-pole /IRQ output, as opposed to the orginal's
open-collector output. Additionally it clears the board
area under the piezo beeper.
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Files
Status: ok
Notes
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This board has the keyboard connector bug from revision
1.1B fixed.
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Files
Status: prototype with bug
Notes
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This board has been tested with a Commodore PET
ROM.
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The 25-pin D-Sub keyboard connector has the wrong
keyboard layout. Silly me, relying on the Commodore
documentation, in this case the 8296 addendum to
the 8032 manual - it has the wrong pinout listed.
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The use of the IEEE488 interface as device, not
controller has not been tested yet.
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I did not really find a fitting piezo beeper
device in the Eagle(tm) libraries, so please
make sure you do not make short circuits. Best
is to isolate the beeper from the board.
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Files
