kerouanton wrote: ↑28 Oct 2018, 07:56
Has anyone tried to plug an USB keyboard to the adapter, using this kind of converter?
I see no a priori reason why it
wouldn't work, even though I haven't tested such devices yet. There must be a microcontroller in that plug as well because USB and PS/2 are completely unrelated protocols. But from Pluggy's point of view that's not different from talking to the microcontroller that's inside every genuine PS/2 keyboard.
The firmware in genuine PS/2 keyboards is probably very standardised, as it is typically frozen in a mask rom. The firmware in that converter is probably stored in some embedded flash. It will be a lot more complex because it must also handle the USB side, and for that reason there
might be subtle differences in observable behaviour. But
if that's the case, and
if that even causes any issue, I would rather see if we can solve/workaround it in the ATtiny85...
Interestingly, with such a converter there will be THREE microcontrollers, working in "bucket brigade style" to inform the Gigatron of the good news of each key being hit: one in the keyboard, and one in each adapter. As long as they're all hidden from sight I suppose that's perfectly acceptable
.
In short: if the whole chain doesn't draw too much current, I expect it to work.
I'll order one when i am back from hospital...(2 to 3 weeks) 
