SMK keyboard codes
SMK keyboard codes do not yet appear to be as structured as those from Alps, and so far seem not to offer much in the way of clues. They do however suggest that the NEC-branded switches were made by SMK.
For series details, see series and parts.
|Long code||Short code||PCB branding||Keyboard||Year||Switches||Source|
|J-M7101-02 Ⓓ||SMK||Zentec Zephyr 00-441-01||—||J-M0404||Bitsavers|
|J-M9030-02Ⓒ¹||GMCK-19EHB||NEC||NEC PC-8801||—||JM-0400, NEC-branded||sandy55.fc2web.com|
|J-M6301-01Ⓓ||SMK||Olivetti ET 121||56.10. (week 10 1981)||Olivetti-designed integrated dome||Deskthority|
|3-J9011-02Y||—||SMK||Kaypro “New” 2||1984||?||deskthority.net|
|401KBM-006-90RⒶ||—||SMK||Acorn BBC Microcomputer||1984 (computer)||J-M0432||wouter.bbcmicro.net|
KBG0301-1031R (shown together)
|SMK||Canon S-51||?||PCB equivalent to KBS03 Series||deskthority.net|
KBG0301-1054R(G) (all three shown together)
|1986 (machine introduction)||PCB equivalent to KBS03 Series||
msx.hansotten.com (HB-G900P/F service manual)
YouTube — Vintage MSX computer teardown (Sony HB-G900P)
|401KAG-060-00RⒷ||KAG9001-0002R||SMK||Unidentified typewriter||None given||Non-discrete slider over dome (most keys); second generation white (inverse cross)||plus.google.com|
|2J-M9021-4||?||Apple||Apple M0110A||1989²||J-M0404, J-M0409 (tall variants)||kbtalking.cool3c.com|
|401KBM-037-01Ⓔ||?||SMK||Tulip ATK 03.01.44||1990 (case)||Second generation ivory tactile (inverse cross)||deskthority.net|
|401KBM-087-01R/02R||KBM0602-1262R/1263RⒷ||SMK||Sony PCY-333?||?||Second generation tortoiseshell tactile (inverse cross)||mousefan.telcontar.net|
|401KBM-087-02RⒷ||KBM0602-1263R(DOSV)||Sony PCY-333||ca. 1992 (case)||Second generation yellow tactile (inverse cross)||~kaineko2|
|401KAS-063-01RⒷ||CMKS-81X¹||SMK||Apple Keyboard II||1991¹ (case)||SMK spring-over-membrane; second generation latching (Alps mount)||applerescueofdenver.com|
- alps.tw believes that the “89-32” written on his M0110A PCB is the production week; while this is extremely late for first generation switches, the photo of the case appears to show March 1990, which does tie up well with the code on the PCB. The controller chip is below the mounting plate and is difficult to document.