Atari 1090 XL
Expansion Cards
Atari 1090
64K Memory Card
(Atari 64KMR)
64K Memory Card - Front
80 Column Video Card - Back
Atari 64K Memory
Module. Up to 3 of these modules could have resided within the 1090XL expansion
chassis. They would be daisy chained together via the expansion header located
in the top center of the card. The card had 2 "Personality" modes. One mode
was the "Bank Switching" mode for use with the 800XL, 1400XL and 1450XLD. The
second mode was the "1064" mode which would have allowed a single memory card to
act as a 1064 expansion module. (The 1064 Expansion module was a 64K box which
could only plug into an Atari 600XL giving it 80K of total memory).
