Re: Slot 3 card: I found another one for a robot

[david@uow.edu.au (David Wilson)]

Patrick Schaefer <patrick.schaefer@topmail.de> writes:
>Apple IIe has built-in firmware for 80col support, but you still have to
>add some hardware. Usually an 74LS374, an 74LS245 and eight 4164A RAM
>chips.

>With this 80col card in the expansion slot you can still use the /DevSel
>line from the regular Slot 3, but not the $C300 /IOSel range. 

Unless you have a PAL //e which has the Aux slot in line with slot 3
preventing me plugging anything in when I have an Aux slot card in place.

I have only seen one card that utilises this arrangement - an Apple 64K
80 col card with its own RCA output jack. It just uses the slot 3 to
provide -5v or -12v to the hybrid circuit.
--
David Wilson  School of IT & CS, Uni of Wollongong, Australia