IBM PALM processor: Difference between revisions
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The I/O bus carries '''4 X-select lines and 4 Y-select lines'''; exactly one X and one Y must be active for a valid device address. This 4 × 4 matrix gives 16 possible device addresses, of which the following are defined in the 5110: | The I/O bus carries '''4 X-select lines and 4 Y-select lines'''; exactly one X and one Y must be active for a valid device address. This 4 × 4 matrix gives 16 possible device addresses, of which the following are defined in the 5110: | ||
{| class="wikitable styled-table" style="width: | {| class="wikitable styled-table" style="width:70%; text-align:center;" | ||
|+'''PALM I/O device addresses (5110 / 5120; 5100 mostly compatible)''' | |+'''PALM I/O device addresses (5110 / 5120; 5100 mostly compatible)''' | ||
! Address !! Device | ! Address !! Device | ||