xotmatrix
xotmatrix
The Mr. Xerox crack of Dung Beetles has an irritating keyboard wait routine at the graphical title screen. ``` 033E: 8D 10 C0 STA KBDSTRB 0341: AD 00 C0 LDA...
AppleWin v1.30.9.0 Windows 10 Home 21H1 I've been looking at some peripheral cards and their schematics to see how they control their ROMs. For the Super Serial Card I noticed...
Some IOU softswitches are not being reset when the system is reset. This can leave the display and annunciators in an incorrect state after a reset. From a fresh start,...
$C010 should not read the keyboard latch on Apple II and Apple II+. On these early Apple II models, reading the $C01x range asserts nothing on the data bus. AppleWin's...
On a pre-Apple //e machine, if a controller is not connected, the paddle button inputs float, which means they are biased "high" in a TTL circuit. Only when a controller...
This is a really interesting project. I'd love see some more processor variants. In particular, the 65C02 processors used in Apple II computers are not represented here. They used NCR...