Compatibility of external MSX keyboards thread

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By popolon_

Champion (288)

popolon_'s picture

25-12-2020, 18:23

I connected paxon keyboard to ntt captain msx, but it seems pinout description is wrong for ntt captain related to X4-X7 pin order.
Pins 14-17 shuold be X4,X5,X6,X7 (not X7,X6,X5,X4)
I double checked that paxon keyboard pinout was correct (from keyboard pcb and also from cable pins), the error is in ntt captain side description.

By popolon_

Champion (288)

popolon_'s picture

27-12-2020, 12:09

here is keyboard pinout for toshiba hx34:
hx34_keyboard_pinout.jpg

so the pins K0-K7 are used for X0-X7, but also pins K0-K3 are used for Ya,Yb,Yc,Yd

so only some special members can edit the corresponding wiki pages, right?

By popolon_

Champion (288)

popolon_'s picture

13-01-2021, 20:49

Ntt captain keyboard pinout is wrong also related to CAPS and KANA pins. Those are actually mixed up in that picture (https://www.msx.org/wiki/File:Captain_ntt_keyboard_pinout_-_...). The right pin for CAPS is 23, and for KANA is 24.

By Pac

Scribe (6782)

Pac's picture

13-02-2021, 19:08

Some keyboard schematics + key matrix:

Sony HB-701FD.
Mitsubishi ML-G30 (already posted here).
Pioneer PX-V60 (same as PX-7).

By leonlas

Expert (112)

leonlas's picture

12-07-2022, 11:59

I have an HC95 and I need a matrix that shows rows and columns and what key is at what position in that matrix. And the rows and columns are connected to the pins on the board, as in the example picture for Atari.
I want to make a PCB keyboard replacement with Cherry keys.
I have made such keyboards for Atari and Commodore.

By sdsnatcher73

Prophet (3539)

sdsnatcher73's picture

16-07-2022, 06:51

Check the keyboard matrices page on MAP. Use Japanese matrix for HC-90. X7-X0 are bit7 to bit0. Y0-Y10 are row0 to row10, for HC-90 these are encoded into YA to YD. Encoding is shown in the datasheet of 74LS145.

By leonlas

Expert (112)

leonlas's picture

25-07-2022, 20:52

I connected a Philips keyboard. I made the adapter with the help of a friend J. thanks a lot! The adapter in the picture. https://www.msx.pics/images/2022/07/25/adapter_msx.jpg
Now I can tested the rest of my computer.
Colleagues, thanks for your help!

By leonlas

Expert (112)

leonlas's picture

27-07-2022, 01:24

I added the second 74hct145 and the numeric works!

By leonlas

Expert (112)

leonlas's picture

18-08-2022, 00:46

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