 | |
| Type | Punched card reader and controller (3505) Punched card reader/punch (3525) |
|---|---|
| Release date | 1971 |
| Predecessor | IBM 2540 |
The IBM 3505 is a reader for 80-column punched cards. It can read cards punched in EBCDIC or column binary at up to 1200 cards per minute (CPM). The IBM 3525 is a multi-function punched card device, capable of reading, punching, and printing on punched cards. The 3505 contains an integrated control unit that attaches to a System/370 byte multiplexer, selector, or block multiplexer channel.[1] An optional feature of the 3505 allows the control unit to also control a 3525, although the two are separately-addressed devices.[2]
The 3505/3525 units attach to a System/370 Model 135 and up, or to a System/360 Model 195.[1]
The 3505 and 3525 were developed at the IBM General Systems Division in Rochester, Minnesota in 1971.[3]
- ^ a b IBM Corporation (1972). A Guide to the IBM System/370 Model 145 (PDF). p. 128. Retrieved Dec 29, 2018.
- ^ IBM Corporation. IBM 3505 Card Reader IBM 2525 Card Punch (PDF). Retrieved Dec 28, 2018.
- ^ IBM Corporation. "IBM Rochester @50" (PDF). Charles Babbage Institute. Retrieved Dec 28, 2018.