Apple Desktop Bus Keyboard
|This article requires additional photographic illustration — replacement orange Alps photo set (more open licensing and photos of the PCB, ICs and caps lock switch), and a replacement set of photos of the salmon Alps keyboard that actually show the switches, as the missing photos will not be added to the existing photo set|
|Model no.||A9M0330 (except older Alps version)|
|Part number||658-4081 (older Alps version)|
BCG5ARA9M0330 (newer Alps version)|
BCG47FA9M0330 (SMK version)
|Manufacturer||Alps Electric, SMK|
|Keyswitches||SMK Alps mount, Alps SKCM Orange, Alps SKCM Salmon|
|Interface||Apple Desktop Bus|
|Years of production||1986–1992|
The Apple Desktop Bus Keyboard was sold with the Apple IIGS computer; as such, it is often referred to as the Apple IIGS Keyboard.
The Apple IIGS and its keyboard were the first Apple products to have:
- Apple Desktop Bus, including an extra port for a daisy-chained connection to the Apple Desktop Bus Mouse
- Power button on the keyboard
- "Platinum" design
Made in Japan. Alps SKCM Orange and Salmon switches. Caps lock is Alps SKCL Lock; in one orange Alps version, this switch is cream. The change to salmon Alps may coincide with the apparent discontinuation of orange Alps around 1991.
Most instances of these keyboards have a simple label, with part number 658-4081. At some stage, the rear label was brought in line with the Taiwan-made version; these are labelled as model A9M0330 as per the SMK version. It would appear that the keyboards with the new label are the ones with salmon Alps switches, but this is presently speculation.
The yellowing characteristics suggest ABS for the case and space bar, and a different material (e.g. PBT) for the remaining keys.
This is likely the earlier version from Alps, with a simple rear label and orange Alps switches.
There appears to be correspondence between the use of salmon Alps switches and the revised rear label that matches the label found on the SMK-made version.
Made in Taiwan, with white tactile SMK Alps mount switches. The PCB has an SMK part number (2J-M9020-02B), and Apple's Technical Procedures refers to the switches as being SMK. The SMK version has double-shot moulded keycaps, which are slightly darker in colour than the Alps version.
The example below is from ca. 1988, while MouseFan's example is from 1987.