In the late 90s I obtained several 386 based ISA and stand alone 386 board that contained ZF Micro Systems module. I unfortunately sold then around 2000. I do have several floppies with information/flash files on the 386 ZF modules still and have the ISA schematics and board layout files. I had...
My bad. Right, My logic fail to realize that the 4KB to 8KB jumps from 24 pins to 28 pins per the JEDEC standard which I know but somehow zoned out during the reply.
Greg
Yep, It is slightly slower and didn't want this to be variable while testing but I will try this tonight for sure. It looks like the baud rate that this would produce is the same as the HCCA port now. 1.79MHz/16 = 111,875 baud.
That is a good idea piping it out through the unused pin of the...
The keyboard 8251 is poop'n NABUs out the TX port At 115,200 baud. Essentially just add a 1.843200MHz crystal oscillator to the /TxC input, grab the TxD out and wiggle TX bit control reg. This great for debug output or maybe Cloud CP/M 80 column serial display. hint, hint. :)
Looking at the schematic for the NABU I see that there is an unused TX port on the keyboard's 8251 UART. I was think that this could be used as a console out which could be duplicated from Cloud CP/M VDM, redirect device from 3.1 CP/M base or simply a debug-out side port. I have just got a...