Re: Ram Factor (or the II Memory card) Technical Information Needed

[mdj <mdj.mdj@gmail.com>]

On Jan 27, 12:09 am, Pat White <patp...@gmail.com> wrote:
> Any body know where I can get the technical information for the Ram
> Factor RAM cards or the Apple II Memory Expansion cards?

The first three IO locations form a 24-bit Address ($C080..2 + s *
16). The fourth is the byte at the location loaded into the first
three.

Note that reading or writing the data location causes the address to
increment automatically. This is why they're called 'Slinky' cards -
they step automatically.

As far as direct access goes, that's all there is to it, except to
watch out for addressing modes that cause an extra read. accidentally
incrementing the address by two.

This is not at all like the Saturn 128k card, which effectively
provides 8 language cards instead of one, and a set of select
registers to switch between them.

Matt