[Photos] Panasonic VP-0187A w/ Hirose Cherry M8

Got this unknown keyboard the other day.
http://imgur.com/a/GAZE7

Image

Its switch is Hirose Cherry M8.
Image

Image

Yellow one on space bar.
Image

This is my first keyboard without microcontroller, its matrix scanner is compised of only some 4000 series logic ICs. It was intriguing to me and setup converter for the keyboard, though typing on M8 switches is sucky to be honest. They are too heavy to me and off center press is very difficult :(

Image

This is my quick memo for converter, just for future reference.
Spoiler:
Code: Select all
Panasonic VP-0187A
==================
2017/08/06

It is unknown keyboard from Panasonic with Hirose Cherry M8 and 6P6C connector.

Pictures:
http://imgur.com/a/GAZE7

Hirose Cheery M8 switches:
https://deskthority.net/wiki/Cherry_M8



Scan
----
The keyboard is comprised of some of 4000 series IC without microcontroller.


    RST>-----------+---------------+
                   |               |
            TC4520 |        TC4520 |
            --------- carry ---------
    CLK>--->|row    |------>|col    |
            |counter|Q3     |counter|
            ---------       ---------
             Q012            Q012
              |||             |||
              |||             ABC   TC4028
              |||           ---------
              |||           |decoder|
              |||           ---------
              |||            |||||| col[0..7]
              ABC TC4512     vvvvvvv   pull down
            ---------- <----|+++++++|--100K--+
            |data    | <----|+++++++|--100K--+
    STATE<--|selector| <----|+++++++|--100K--+
            | 7 to 1 | <----|+++++++|--100K--+
            ---------- <----|+++++++|--100K--+
                row[0..7]   | 8x8 matrix     |
                            |                -
              TC4078        |               GND
              ------        |
    SENSE<----| OR |========+ OR'd row[0..7]
              ------

- TC4520BP - Dual Binary Up Counter
- TC4028B  - BCD-to-Decimal Decoder
- TC4512BP - 8-Channel Data Selector
- TC4081BP - Quad 2-Input AND Gate
- TC4071BP - Quad 2-Input OR Gate
- TC4078BP - 8-Input NOR/OR Gate

Matrix
------
        0       1       2       3       4       5       6       7
    --------------------------------------------------------------------
    0   ESC     1       2       3       4       5       6       7
    1   8       9       0       -       ^       BS      INS     DEL
    2   TAB     Q       W       E       R       T       Y       U
    3   I       O       P       @       [       ]       F2      F1
    4   CTRL    A       S       D       F       G       H       J
    5   K       L       ;       :       RETURN  UP      F3      F4
    6   SHIFT   Z       X       C       V       B       N       M
    7   SPACE   ,       .       /       LEFT    RIGHT   DOWN    HOME



6P6C connector pinout
---------------------
1. VCC
2. Clock     - sends clock to binary counter TC4520
3. Key State - indicates hi if key selected by counter is active
4. Sense     - indicates lo if any key is active while Reset is hi.
5. Reset     - resets counter and drives all column
6. GND

      123456
    ,--------.
    | |||||| |
    |        |
    `--____--'
       plug


Ping configuration
------------------
AVR ATmega32u4 is used as protocol converter.

    PD0: Clock. Counter couts up at falling edge.
    PD1: Key State. Hi if selected key is activated.
    PD2: Sense. Lo if any key is activated while Reset is Hi.
    PD3: Reset. Resets counters at riging edge.
hasu
User avatar

Unread post08 Aug 2017, 02:55

User avatar
X
hasu
 
Posts: 344
Joined: 02 Sep 2011, 14:47
Location: Japan
Main keyboard: HHKB
Main mouse: HHKB
Favorite switch: Topre
Club member: -
 
Curious — I thought I'd seen them with only "HIROSE" written on the bottom. M8 is not well-documented.

So, yellow is for space bar — where does the light grey one go?

That hole in the base of the switch is interesting — it's like they've made room for a tiny LED.
Daniel Beardsmore
User avatar

Unread post08 Aug 2017, 08:22

User avatar
X
Daniel Beardsmore
 
Posts: 4829
Joined: 17 Aug 2011, 18:23
Location: Hertfordshire, England
Main keyboard: Filco Majestouch 1 (home)/Poker II backlit (work)
Main mouse: MS IMO 1.1
Favorite switch: Probably not whatever I wrote here
Club member: -
 
Quite a find, never seen one like it. Thanks for sharing!
seebart
User avatar
Offtopicthority Instigator

Unread post08 Aug 2017, 09:56

User avatar
X
seebart
Offtopicthority Instigator
 
Posts: 10207
Joined: 22 Nov 2013, 20:20
Location: Germany
Main keyboard: Rotation
Main mouse: Steelseries Sensei
Favorite switch: IBM capacitive buckling spring
Club member: 0061
 
 
What would you compare the switches to?
paecific.jr
User avatar

Unread post08 Aug 2017, 13:50

User avatar
X
paecific.jr
 
Posts: 132
Joined: 04 Dec 2016, 17:56
Location: United States
Main keyboard: IBM Model F 122
Main mouse: Logitech Performance MX
Favorite switch: Capacitive Buckling Springs
Club member: -
 
The symbols layout is different to most common modern ones, that is interesting.
ideus
User avatar

Unread post09 Aug 2017, 01:02

User avatar
X
ideus
 
Posts: 386
Joined: 18 Mar 2013, 17:00
Location: Fun but dangerous: Based in Mexico now.
Main keyboard: GON60
Main mouse: Logitech
Favorite switch: Ergo Clears.
Club member: 0200
 
Daniel Beardsmore wrote:Curious — I thought I'd seen them with only "HIROSE" written on the bottom. M8 is not well-documented.

So, yellow is for space bar — where does the light grey one go?

That hole in the base of the switch is interesting — it's like they've made room for a tiny LED.

Grey switches are located in all other keys than space. The switch in macro pic was desolder from right bottom HOME key, btw.
hasu
User avatar

Unread post09 Aug 2017, 05:00

User avatar
X
hasu
 
Posts: 344
Joined: 02 Sep 2011, 14:47
Location: Japan
Main keyboard: HHKB
Main mouse: HHKB
Favorite switch: Topre
Club member: -
 
I wondered — they're much darker in all the other photos.
Daniel Beardsmore
User avatar

Unread post09 Aug 2017, 08:31

User avatar
X
Daniel Beardsmore
 
Posts: 4829
Joined: 17 Aug 2011, 18:23
Location: Hertfordshire, England
Main keyboard: Filco Majestouch 1 (home)/Poker II backlit (work)
Main mouse: MS IMO 1.1
Favorite switch: Probably not whatever I wrote here
Club member: -
 
My Japanese is not perfect, but that writing is some sort of health warning.
"Do not use for more than 10 to 15 minutes, cover eyes and hands."
If you post a clearer picture I could tell you more exactly.
It may have come from a medical or nuclear facility.
flowerlandfilms

Unread post13 Aug 2017, 19:21

X
flowerlandfilms
 
Posts: 11
Joined: 18 Aug 2016, 04:44
Location: Australia
Main keyboard: Silicon Graphics Mechanical
Main mouse: Razer KOTOR
Favorite switch: the on/off switch
 
The warning says
"
注意
健康を損なう恐れあり
長時間使用するときは、健康のため、1時間ごとに
10~15分の休憩をとり、目および手を休める
"
http://i.imgur.com/Jj1yYge.jpg


translation with my poor engrish:
"
may harm your health
take 10-15 minutes rest per hour for your eyes and hands when you have to use for long time
"

It seems to be general health waring of computer(VDT) operaton for that age.
hasu
User avatar

Unread post13 Aug 2017, 22:05

User avatar
X
hasu
 
Posts: 344
Joined: 02 Sep 2011, 14:47
Location: Japan
Main keyboard: HHKB
Main mouse: HHKB
Favorite switch: Topre
Club member: -
 
hasu wrote:The warning says
"
注意
健康を損なう恐れあり
長時間使用するときは、健康のため、1時間ごとに
10~15分の休憩をとり、目および手を休める
"
http://i.imgur.com/Jj1yYge.jpg


translation with my poor engrish:
"
may harm your health
take 10-15 minutes rest per hour for your eyes and hands when you have to use for long time
"

It seems to be general health waring of computer(VDT) operaton for that age.

Well that's good. A long as it doesn't melt through the desk you're ok.
flowerlandfilms

Unread post14 Aug 2017, 07:11

X
flowerlandfilms
 
Posts: 11
Joined: 18 Aug 2016, 04:44
Location: Australia
Main keyboard: Silicon Graphics Mechanical
Main mouse: Razer KOTOR
Favorite switch: the on/off switch
 

Who is online

Users browsing this forum: No registered users and 32 guests