| Start
|
End
|
Size
|
DEF Name
|
Delay
|
Description
|
| $000000
|
$0FFFFF
|
1MiB
|
|
0 or 1 (4/5 clks) depending on ROMWAIT.
|
Vector table, First fixed bank of the 68k program ROM (P ROM)
|
| $100000
|
$10F2FF
|
64KiB
|
WORKRAM
|
0 (4 clks)
|
User RAM
|
| $10F300
|
$10FFFF
|
BIOS-reserved RAM
|
| $200000
|
$2FFFFF
|
1MiB
|
|
0 to 3 (4/7 clks) depending on PWAIT.
|
Second bank of the 68k program ROM (also used for bankswitching and special chips)
|
| $300000
|
$39FFFF
|
|
|
0 (4 clks)
|
Input ports (See Memory mapped registers)
|
| $3A0000
|
$3BFFFF
|
|
|
|
Ouput ports (See Memory mapped registers)
|
| $3C0000
|
$3FFFFF
|
|
|
0 (4 clks)
|
GPU ports (See Memory mapped registers)
|
| $400000
|
$401FFF
|
8KiB
|
PALETTES
|
0 (4 clks)
|
Banked palette RAM
|
| $800000
|
$BFFFFF
|
8 MiB max
|
MEMCARD
|
2 (6 clks)
|
Memory card
|
| $C00000
|
$C1FFFF
|
128KiB
|
BIOSROM
|
0 (4 clks)
|
System ROM (BIOS)
|
| $D00000
|
$D0FFFF
|
64KiB
|
|
0 (4 clks)
|
Backup RAM (MVS only)
|
|
| Start
|
End
|
Size
|
DEF Name
|
Description
|
| $000000
|
$0FFFFF
|
2MiB
|
|
Vector table, 68k program (PRG files), 68k RAM
|
| $100000
|
$10F2FF
|
64KiB
Shared with the 68k code DRAM.
|
WORKRAM
|
User RAM
|
| $10F300
|
$10FFFF
|
BIOS-reserved RAM
|
| $110000
|
$1FFFFF
|
|
|
68k program ?
|
| $300000
|
$39FFFF
|
|
|
Input ports (See Memory mapped registers)
|
| $3A0000
|
$3BFFFF
|
|
|
Ouput ports (See Memory mapped registers)
|
| $3C0000
|
$3FFFFF
|
|
|
GPU ports (See Memory mapped registers)
|
| $400000
|
$401FFF
|
8KiB
|
PALETTES
|
Banked palette RAM
|
| $800000
|
$803FFF
|
8 KiB
|
MEMCARD
|
Virtual memory card (onboard battery-backed RAM)
(8bit, even bytes are always $FF)
|
| $C00000
|
$C7FFFF
|
512KiB
|
BIOSROM
|
System ROM (BIOS)
|
| $D00000
|
$DFFFFF
|
|
|
?
|
| $E00000
|
$EFFFFF
|
1MiB
|
UPLOAD
|
Upload zone
|
| $FF0000
|
$FF01FF ?
|
|
|
CD and DMA specific I/O registers
|
|
Infos from [MAME's source].
| Start
|
End
|
Size
|
DEF Name
|
Description
|
| $000000
|
$07FFFF
|
512KiB
|
|
68k program (P ROM).
|
| $100000
|
$17FFFF
|
|
|
Banked 68k program or I/O (writes done here).
|
| $200000
|
$20FFFF
|
64KiB
|
|
68k RAM
|
| $300000
|
$30FFFF
|
64KiB
|
|
Backup RAM
|
| $400000
|
$43FFFF
|
|
|
VRAM ?
|
| $500000
|
$51FFFF
|
128KiB
|
|
Palette RAM
|
| $600000
|
$600001
|
|
|
Z80 I/O
|
| $600002
|
$600003
|
|
|
RTC I/O
|
| $600004
|
$60000D
|
|
|
I/O registers
|
| $700000
|
$70001B
|
|
|
GPU registers
|
| 70001E
|
70001F
|
|
|
Watchdog
|