68k memory map: Difference between revisions
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m (moved 68k Memory Map to 68k memory map) |
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| Line 2: | Line 2: | ||
| '''Start address''' | | '''Start address''' | ||
| '''End address''' | | '''End address''' | ||
| '''Size''' | |||
| '''[[ASM Defines|DEF]] Name''' | | '''[[ASM Defines|DEF]] Name''' | ||
| '''Description''' | | '''Description''' | ||
| Line 7: | Line 8: | ||
| $000000 | | $000000 | ||
| $0FFFFF | | $0FFFFF | ||
| 1MiB | |||
| | | | ||
| First | | First fixed bank of the [[68k]] binary ([[P ROM]] or [[PRG file]]) | ||
|- | |- | ||
| $100000 | | $100000 | ||
| $10F2FF | | $10F2FF | ||
| | |rowspan="2"|64KiB<br>(Mirrored up to $1FFFFF) | ||
| WORKRAM | |||
| [[68k user RAM|User RAM]] | | [[68k user RAM|User RAM]] | ||
|- | |- | ||
| Line 18: | Line 21: | ||
| $10FFFF | | $10FFFF | ||
| | | | ||
| [[BIOSes|BIOS]] RAM | | [[BIOSes|BIOS]]-reserved RAM | ||
|- | |- | ||
| $200000 | | $200000 | ||
| $2FFFFF | | $2FFFFF | ||
| 1MiB | |||
| | | | ||
| Second | | Second bank of the 68k binary (bankswitch possible on some carts, $2FFFE0 ?) | ||
|- | |- | ||
| $300000 | | $300000 | ||
| $3FFFFF | | $3FFFFF | ||
| | |||
| | | | ||
| [[Memory mapped registers]] | | [[Memory mapped registers]] | ||
|- | |- | ||
| $400000 | | $400000 | ||
| $ | | $7FFFFF | ||
| 8KiB (Mirrored) | |||
| PALETTERAM | | PALETTERAM | ||
| [[Palette RAM]] | | [[Palette RAM]] | ||
|- | |- | ||
| $800000 | | $800000 | ||
| $ | | $BFFFFF | ||
| 4 KiB (Mirrored) | |||
| MEMORYCARD | | MEMORYCARD | ||
| [[Memory card]] (Even bytes are always $FF) (Replaced with onboard RAM in CD systems) | | [[Memory card]] (Even bytes are always $FF) (Replaced with onboard RAM in CD systems) | ||
| Line 42: | Line 49: | ||
| $C00000 | | $C00000 | ||
| $C1FFFF/$CFFFFF | | $C1FFFF/$CFFFFF | ||
| | | 128KiB/512KiB | ||
| BIOSROM | |||
| System's [[BIOSes|BIOS]] (size depends on system: 128kB mirrored or 512kB) | | System's [[BIOSes|BIOS]] (size depends on system: 128kB mirrored or 512kB) | ||
|- | |- | ||
| $D00000 | | $D00000 | ||
| $ | | $DFFFFF | ||
| 64KiB (Mirrored) | |||
| | | | ||
| 64KiB [[battery-backed RAM]] (MVS only) | | 64KiB [[battery-backed RAM]] (MVS only) | ||
| Line 52: | Line 61: | ||
| $E00000 | | $E00000 | ||
| $EFFFFF | | $EFFFFF | ||
| | | 1MiB | ||
| | | UPLOAD | ||
| Upload zone (only on [[:Category:CD systems|CD systems]]) | |||
|- | |||
| $FF0000 | |||
| $FFFFFF ? | |||
| | |||
| | |||
| CD system registers | |||
|} | |} | ||
[[Category:CPUs]] | [[Category:CPUs]] | ||
Revision as of 14:45, 24 March 2011
| Start address | End address | Size | DEF Name | Description |
| $000000 | $0FFFFF | 1MiB | First fixed bank of the 68k binary (P ROM or PRG file) | |
| $100000 | $10F2FF | 64KiB (Mirrored up to $1FFFFF) |
WORKRAM | User RAM |
| $10F300 | $10FFFF | BIOS-reserved RAM | ||
| $200000 | $2FFFFF | 1MiB | Second bank of the 68k binary (bankswitch possible on some carts, $2FFFE0 ?) | |
| $300000 | $3FFFFF | Memory mapped registers | ||
| $400000 | $7FFFFF | 8KiB (Mirrored) | PALETTERAM | Palette RAM |
| $800000 | $BFFFFF | 4 KiB (Mirrored) | MEMORYCARD | Memory card (Even bytes are always $FF) (Replaced with onboard RAM in CD systems) |
| $C00000 | $C1FFFF/$CFFFFF | 128KiB/512KiB | BIOSROM | System's BIOS (size depends on system: 128kB mirrored or 512kB) |
| $D00000 | $DFFFFF | 64KiB (Mirrored) | 64KiB battery-backed RAM (MVS only) | |
| $E00000 | $EFFFFF | 1MiB | UPLOAD | Upload zone (only on CD systems) |
| $FF0000 | $FFFFFF ? | CD system registers |