Oh yeah, I suppose you could do that. Just be sure to do it with
interrupt disabled because those outputs are also used for other purposes.
Ken
On 9/23/25 8:19 PM, Mike Stein wrote:
So, can't you scan it like a keyboard, i.e. output one of the 8 bits
at a time and check if it appears on the input pin?
What am I missing?
m
On Tue, Sep 23, 2025 at 11:08 PM Kenneth Pettit <[email protected]>
wrote:
The printer port is output only except for 2 inputs: BUSY and /BUSY
Ken
On 9/23/25 7:59 PM, Mike Stein wrote:
Couldn't you just scan the printer port looking for 1 out of 8
switch closures?.
m
On Tue, Sep 23, 2025 at 9:42 PM Scott McDonnell
<[email protected]> wrote:
I am back to thinking about a joystick for the Model 100. I
have a
specific reason in mind and even a specific joystick.
My intent is to target the Atari/Commodore 64 digital
joystick interface
mainly because my inspiration is the Suncom Icontroller which
mounts to
the side of the machine.
This interface is a series of 5 discrete switches to control
direction
and a fire button. Very basic.
While the parallel port would have been ideal for something
like this,
it is not bidirectional and offers only two inputs.
The serial port provides 3 inputs; still not enough
While some multiplexing strategies might allow this to work,
both of
those ports are also often used for other important purposes.
So I started thinking about the barcode port. It only has one
input, but
the joystick could be encoded into a serial stream. Maybe
even using the
original barcode drivers. I don't know the specifics of the BCR
implementation here, but often they are just keyboard wedges.
Any thoughts on this or a better solution?
