Apple called it "Super" because it was able to function as both of Apple's previous cards, the Apple II Communications Card for modem use and the Apple II Serial Interface Card for printer use. Super Serial Card – Apple Computer Īpple Computer's Super Serial Card, sometimes abbreviated as "SSC", is the most well known communication card made for the Apple II. įor more on the Serial Pro's clock capabilities, see its entry in Apple II system clocks. The card retailed for $139 during the late 1980s. The lifespan of the card's battery (which retained configuration information and powered the clock chip when the computer was powered off) was touted as 20 years.
The Serial Pro utilized the MOS Technology 6551 ACIA chip and offered serial baud rates from 50 bit/s to 19,200 bit/s. It could print either HiRes page (or both in a single dump) normally, or print page one rotated or inverted.
If used with a dot-matrix printer, the Serial Pro offered several screen-print variations. Previous multifunction cards required that a secondary function be "mapped" to a different slot in the computer's memory, rendering that slot unusable. This card was unique in the sense that it did not use "Phantom Slots" to achieve this functionality. The Serial Pro was a multifunction card which included a ProDOS and DOS 3.3 compatible clock/calendar, freeing up an extra slot for those with highly populated machines. Unlike the Apple SSC, which used a jumper block to select printer mode or modem mode, the Serial Pro board had two connectors to which the card's ribbon cable could be connected, one for use with a printer and one for use with a modem. The Serial Pro serial interface card from Applied Engineering was compatible with the Apple Super Serial Card. Unfortunately the P8A ROM revision was not compatible with some printers that worked under the original P8 ROM. The P8A ROM supported handshaking while the earlier P8 rom didn't. Designed for printing, this card had ROM revisions, P8 and P8A. The Apple II Serial Interface Card was released by Apple Computer shortly after the Communications Card, in August 1978. Apple II Serial Interface Card – Apple Computer
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It offered speeds of 110 and 300 bit/s but with a simple hardware modification (described in the manual accompanying the card) one could change this to 3 bit/s, or 12 bit/s. Released in 1978 for $225, it was designed to work with modems utilizing acoustic couplers. The Apple II Communications Card is the original serial card from Apple Computer. 2 Apple II Serial Interface Card – Apple ComputerĪpple II Communications Card – Apple Computer.1 Apple II Communications Card – Apple Computer.