Turns out today is a two card day: SC26C92 UART, timer and I/O card

[Alan Cox]

This one is intended to be the companion to the 68008 card once that is debugged and working. However it also works fine with other processors.

It uses an SC26C92 to provide two serial ports, a timer interrupt, and GPIO. The GPIO is expanded out into three bitbang SPI ports using the same logic as the SC126 expander/fixer I produced some time ago, but this time with extra input/output lines for all those SPI devices who want stuff like a C/D line or an interrupt indicator. I've also added some initial Fuzix drivers for it but not yet handling the baud rate setup.

As it uses the same clock as the standard RC2014 it can use that clock, but unlike the QUART there is plenty of room so it can also be used with a separate can oscillator, or it can provide the system clock. There is also an optional reset circuit although I've yet to test that.

Alan