68k user RAM: Difference between revisions

Revision as of 07:59, 19 April 2011

Sometimes called "work RAM".

64KiB mapped in the 68k's memory space, from $100000 to $10FFFF (mirrored up to $1FFFFF on cartridge systems.

The range from $10F300 to $10FFFF is used by the BIOS functions and shouldn't be used as regular work RAM.

In CD systems, the 68k's RAM is used in the same way, but is located in part of the program DRAM instead of in separate static RAM chips (?).

2KiB mapped in the Z80's memory space, from $F800 to $FFFF.

@@ Line 1: / Line 1: @@
-Sometimes called Work RAM.
+Sometimes called "work RAM".
-User RAM is in the [[68k]]'s memory space, from $100000 to $10F2FF.
+==68k user RAM==
-Technically, $10F300 to $10FFFF is also RAM, but reserved for the [[BIOSes|BIOS]].
+KiB mapped in the [[68k]]'s memory space, from $100000 to $10FFFF (mirrored up to $1FFFFF on [[cartridge systems]].
+The range from $10F300 to $10FFFF is used by the [[BIOSes|BIOS]] functions and shouldn't be used as regular work RAM.
+In [[CD systems]], the 68k's RAM is used in the same way, but is located in part of the program [[DRAM]] instead of in separate static RAM chips (?).
+==Z80 user RAM==
+KiB mapped in the [[Z80]]'s memory space, from $F800 to $FFFF.
 [[Category:CPUs]]