68k memory map

In Cartridge systems Start End Size DEF Name Delay Description $000000 $0FFFFF 1MiB 1 (5 clks) 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 (4 clks) 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)

In CD systems 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

For Neo Print boards

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