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Forum: Kenbak-1 10-13-2007, 11:42 PM
Replies: 9
Views: 55,634
Posted By Geoff Harrison
Yep, it works fine. The only reason I used...

Yep, it works fine.

The only reason I used Positive Non-Zero on the unconditional jump was because the last 3 bits of the instruction must not be less than 003, so I just set them to 007. Any...
Forum: Kenbak-1 10-10-2007, 12:39 PM
Replies: 9
Views: 55,634
Posted By Geoff Harrison
Oops. Also, why didn't I do the pause in line...

Oops. Also, why didn't I do the pause in line this time instead of as a subroutine? Oh well.

I'm still writing these little routines directly in machine language and then back filling the...
Forum: Kenbak-1 10-09-2007, 02:57 PM
Replies: 9
Views: 55,634
Posted By Geoff Harrison
OK, here's another version using indexed mode. ...

OK, here's another version using indexed mode. It's easier to change the pattern in this one by just changing the table


Addr Value
---- ---------
; Display Cylon...
Forum: Kenbak-1 10-09-2007, 01:48 PM
Replies: 9
Views: 55,634
Posted By Geoff Harrison
No, no stack on a Kenbak. The JMD (Jump and Mark...

No, no stack on a Kenbak. The JMD (Jump and Mark Direct) instruction stores the value {program counter}+2 at the address in the operand, then jumps to the address {operand}+1. To return you do an...
Forum: Kenbak-1 10-08-2007, 08:23 PM
Replies: 9
Views: 55,634
Posted By Geoff Harrison
Kenbak-1 demo program.

Well, I finally got tired of watching the Kanbak-1 counting to 255 in binary, so I wrote a little program to do a Cylon display on the LEDs instead.

Change the value at 034 to change the speed.
...
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