As an exercise, I'm trying to add support in EmuTOS for old Microsoft serial mouse plugged on Amiga RS-232 port. The protocol is described
there. It uses 1200 baud, but only 7 data bits and no parity.
The protocol indicates that each mouse change sends a packet of 3 "bytes". But I only receive the first byte (through RBF interrupt).
By reading the docs, it seems that Amiga hardware is only able to receive 8 data bits with no parity, or 9 bits (i.e. 8 data bits and 1 parity bit).
My question: Does the Amiga RS-232 port support receiving 7-bit data, without parity?