ps/2 keyboard to msx

بواسطة Shinobi

Master (198)

صورة Shinobi

19-07-2020, 12:42

Hi..

Any solution to make ps2 keyboard work on msx??

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بواسطة Meits

Scribe (6476)

صورة Meits

19-07-2020, 13:22

Yes :)

بواسطة caro

Champion (512)

صورة caro

19-07-2020, 17:04

بواسطة conceitedjerk

Rookie (19)

صورة conceitedjerk

19-07-2020, 21:32

Meits wrote:

Yes :)

I second this recommendation. I bought one of Leonardo's PS/2 adapters earlier this year for my ailing HB-F1XD, it works great.

بواسطة Danjovic

Master (212)

صورة Danjovic

01-08-2020, 01:49

Don't this keyboard adapter on a cartidge drive the bus at the same time that the PPI during 'in ($aa)' instruction ?

بواسطة sdsnatcher73

Prophet (2533)

صورة sdsnatcher73

01-08-2020, 05:06

That is probably true but as long as you do not press a key on both the original keyboard AND the PS/2 that is not an issue. I suspect the signals are logical AND towards the bus so if internal would put 00000001 and external would put 00000010 the MSX would read 00000011 which would still be okay but give a different character then expected.

بواسطة ducasp

Champion (475)

صورة ducasp

01-08-2020, 05:17

Keyboard input is pulled up, so it is normally vcc when keys are open, that means every time a key is pressed PPI will feed current to the cartridge adapter that will force a 0 on a line PPI is outputting 1,if it just drain enough current to have voltage level detected as logical 0 by z80 but still within the ppi limits, it should be fine, otherwise, it might cause issues to the PPI in the long run.

بواسطة karloch

Prophet (2156)

صورة karloch

01-08-2020, 10:19

I have a Padial adapter based on Z8 microcontroller that works wonderfully well; however it won't work with Panasonic MSX2+ or TR machines.