A2 DIGITAL LOGIC SIMULATOR 1.0
Here is the I/O card I made for the parallel
port. OUTPUTs of a simulated circuit can be
directed to the parallel card, giving a visual
indication of output. This is faster than drawing
to the screen, and also lets you INPUT/OUTPUT from
a REAL circuit, external to the Apple II, OR from
ANOTHER APPLE II running the simulator, simulating
a different circuit!
The animation is screen shots of the simulation
program drawing the screen initially when a
circuit is opened. You can see the gates, the
circles on the left side are INPUTS and the
circle on the right side is an OUTPUT.
I got the simulator to work! AND/OR/NOT,
graphical output, programmable input, parallel
card input and output, parallel card controllable
clock, screen output, all connections are drawn
out nicely, "1" state is represented by a square
dot on the input or output with that state
(during execution) "0" state is represented by
regular input/output indicator.
graphical display (done)
grid system for graphical display
(slow) simulation of the 6502 + the Apple II BUS?
Here is the logic simulator/editor. I need to
clean up the graphic display of connections
I have the connections drawing fairly nice
now. Problems include: goto gate from input
a few other draw problems exist, but only a
pixel or two get lit because of this, or some
connectors go directly to the gate, instead
of coming out of the gate, and turning 90
degrees after about 1/4 inch from the gate.
it up a bunch by routing wires at 90 degree angles. I still
need to bring wires away from gates before moving them
elsewhere. It's alot nicer looking and it works.
The pictured circuit is Stephane Guillards IDE interface.
The graphic display subroutine needs some work because
it appears some of the gates are not connected properly,
even though they are and the logic of the circuit executes
correctly and gives the correct output.
I want to add "dots" to represent where a wire turns a corner
or where it branches to other places. This will make it easy
to distinguish between wires that are/aren't connected
If the program interests you, give me an email!