Well a lot of work on #LT6502b today.
Now running at 10MHz (up from 7MHz), Keyboard now working and I can receive data from the WiFi Modem.
Next is making the CPLD transmit to the WiFi Modem.
Then trying to figure out why I can't run at 14MHz...

#Retrocomputing #6502

IT WORKS!!!

With a bit of effort I can now receive data from the UART on my keyboard controller, into the CPLD and read it form BASIC on my 6502 laptop revision b (slim version).

I've set the Keyboard controller to output characters from $20 to $7F, here you can see them being shown.

There is also a "new data received" status register too!

#CPLD #LT6502B

Well the CPLD UART is coming along, another big step... Now when it's done receiving a byte, it transfers it to a register, which can then be read at anytime by the CPU. So that the CPU doesn't read garbage if it tries to read mid transfer (double buffer).

more to do yet as I need two such registers and I also want the register to be cleared once it's been read, but this is BIG progress.

This is all done in WINCUPL, not VHDL/Verilog.

#CPLD #LT6502b