Kenosha Reuse Discussion Board > GURNEE, IL
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> Used
> Mem+ memory i/o 4 morpheus parallax propeller P8X32 pcb
Mem+ memory i/o 4 morpheus parallax propeller P8X32 pcb
THIS LISTING IS FOR A BARE PCB ONLY AND DOES NOT INCLUDE ANY COMPONENTS
More on the memory and bus design:
* page address is latched from P0-P15 when P26&27 are both pulled low
* addresses $000000-$07FFFF reserved for memory mapped I/O
* on-board 512K ram addressed at $200000-$27FFFF, but mirrored thru $37FFFF
* $400000-$5FFFFF nominally for first Mem+ board
* $600000-$7FFFFF nominally for second Mem+ board
You can have 7.5MB of memory in your Morpheus Stack by using four Mem+ boards as follows:
* select address range starting at $000000 for the first Mem+ board
* DO NOT POPULATE first socket as its address space is used for I/O
* populate remaining three sockets on that board
* select address range starting at $200000 for the second Mem+ board
* remove the 512KB memory chip from Morpheus, populate all four memory sockets on second board
* select address range starting at $400000, populate all four sockets
