Just a further note on the topic of PS/2 Splitter cables.
I recently purchased a Genius DX-110 Optical Mouse, on connecting the mouse to the Q68, via Splitter cable, stopped the Q68 booting up at the Ram Test stage, or more specifically at the point where the Q68 detects the PS/2 Mouse.
A Perixx Mouse 201-B PS/2 mouse works perfectly.
I examined the Genius DX-110 PS/2 Connector, which has these connections, it seems that the mouse connections use the Keyboard Data and Clock connections.:
Mouse Data connected to Keyboard Data 1
Mouse Clock connected to Keyboard Clock Pin 5
As shown in this diagram:
- PS.png (9.95 KiB) Viewed 8542 times
This is the probable reason of the failure of PS/2 Mouse(s) (...Mice) on the Q68, the PS/2 Mouse to be connected to a PC uses the Keyboard Data and Clock connections and the PC PS/2 Controller chip on the PS/2 Interface decides whether the data supplied is keyboard or mouse and sends the data to the correct port.
In the case of the Q68, which uses Pins 2, 6 for Mouse Data and Clock signals will fail on the PC standard Mouse connections using Pins 1, 5 for Mouse Data and Clock signals.
A possible solution is to interchange Pin 1,2 and Pin 5,6 for the Q68 to use a PC PS/2 Mouse, with diodes to stop cross-linking of the respective signal lines
I will have to do some testing on this, to verify if this superstition is correct.
