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* [[153 | Model 153 Tektronix Instrument Interface]] | * [[153 | Model 153 Tektronix Instrument Interface]] | ||
* [[154 | Model 154 RS-232C Interface]] | * [[154 | Model 154 RS-232C Interface]] | ||
These connect to the calculator through card-edge bus | These connect to the calculator through a 50-pin card-edge bus interface supporting DMA access at up to 125 kbyte/s. | ||
The bus uses open-collector TTL drivers and can be daisy-chained through multiple peripherals (which all have two matching bus connectors for this purpose). | |||
It must be terminated at the last unit. | |||
==Manuals== | ==Manuals== | ||