Personal Computer User Manual

RAM500 Memory Expansion Module
http://www.motorola.com/computer/literature D-3
D
When populated, the optional RAM500 memory expansion memory
blocks should appear as Block C and Block E to the Hawk ASIC. Block C
and E are used because each of the module’s SPD is defined to correspond
to two banks of memory each: C and D for the first SPD and E and F for
the second SPD.
The RAM500 SPD uses the SPD JEDEC standard definition and is
accessed at address $AA or $AC. Refer to the following section on SROM
for more details.
Table D-2. RAM500 SDRAM Memory Size Options
RAM500 Memory
Size
Device Size Device Organization Number of Devices
32 Mbytes 64 Mbit 4Mx16 5*
64 Mbytes 128 Mbit 8Mx16 5*
128 Mbytes 256 Mbit 16Mx16 5*
64 Mbytes 64 Mbit 8Mx8 9
128 Mbytes 128 Mbit 16Mx8 9
256 Mbytes 256 Mbit 32Mx8 9