Caple C871i Manuel d'utilisateur télécharger pdf (Page 25)

100

101

Apple II Computer Info

from your printer. This supports most popular serial printers.

The second set of DIP swithces (close to the front of the card) is for

generating Maskable (IRQ) and Non Maskable (NMI) interrupts from the 6551

Asynchronous Communications Interface Adaptor (ACIA) chip and the 6818

clock chip. The swithces select the type and source of interrupt

request. Normally all switches are in the OPEN position.

o Switch 1: IRQ from 6551

o Switch 2: NMI from 6551

o Switch 3: IRQ from 6818

o Switch 4: NMI from 6818

Hope this information helps.

Kevin M. Carr

[email protected]

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Apple II Computer Technical Information : Apple II Family Hardware Info

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Caple C871i Manuel d'utilisateur Page 25

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