December 9, 2019
The Klinger (Newport) CC1.1 Stepper motor controller
I bought one of these for $30 on Ebay in early December of 2019.
The total cost was actually $73.77 when shipping and tax was included.
Of course, one of the first things I did
after plugging it in and seeing if any lights came on
(they did)
was to open up the box and look inside.
Inside are two large logic circuit boards,
a smaller "power" board that includes a linear power supply,
and a small switching power supply inside a metal cage.
Date codes on the chips are 1988 and 1989.
The upper logic board has two identical sections, one of which is just empty sockets.
Likely the dual axis CC1.2 unit uses the same board.
The big chips (40 pin DIP) on this board are:
- HEF4738VP -- Philips IEEE 488 controller
- EF6821 -- well known PIO
- 65SC02 -- some kind of 6502 variant
- EF6821 -- well known PIO
- 2716 EPROM -- 2k by 8, 24 pins
- MCM6810 -- 128 byte static ram, 24 pins
According to Wikipedia, the 65SC02 is a variant of the WDC 65C02 without bit instructions.
In other words it omits the BBR, BBS, RMB and SMB instructions.
The logo on this chip is "CMD", which is California Micro Devices.
A huge crystal on the board nearby is marked "1.0", so this is probably
running at 1 Mhz.
The lower logic board holds the following large chips:
- HEF4738VP -- Philips IEEE 488 controller
- CY512 -- "Intel" (CMS) stepper controller
- IM6402 -- Intersil, legendary ancient UART
It is curious that there are two IEEE 488 chips, one on each board.
The CY512 is made by "Cybernetic Micro Systems" and is in many ways the
heart of this device. Nicely enough, a detailed manual is available online.
The Intel markings suggest that Intel contracted to fab this chip.
On with the show
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Tom's Computer Info / tom@mmto.org