Motherboard Resources; Memory Map; Dma Channels; I/O Map - Mitsubishi Electric CX series Owner's Handbook Manual

M o t h e r b o a r d

Motherboard resources

Memory map

Address Range
(decimal)
1024 K - 393216 K
928 K - 1024 K
896 K - 928 K
800 K - 896 K
640 K - 800 K
0 K - 640 K

DMA channels

DMA Channel Number
0
1
2
3
4
5
6
7

I/O map

Address (hex)
0000 - 000F
0020 - 0021
002E - 002F
0040 - 0043
0048 - 004B
0060
0061
0064
0070 - 0071
5/20 OWNER'S HANDBOOK
Address Range
(hex)
100000 - 18000000
E8000 - FFFFF
E0000 - E7FFF
C8000 - DFFFF
A0000 - C7FFF
00000 - 9FFFF
Data Width
8- or 16-bits
8- or 16-bits
8- or 16-bits
8- or 16-bits
16-bits
16-bits
16-bits
Size Description
16 bytes DMA controller 1
2 bytes Interrupt controller 1
2 bytes Super I/O controller configuration registers
4 bytes Counter/Timer 1
4 bytes Counter/Timer 2
1 byte Keyboard controller
1 byte NMI, speaker control
1 byte Keyboard controller
2 bytes Real time clock controller
Size Description
383 MB Extended memory
96 KB System BIOS
32 KB System BIOS (available as UMB)
96 KB Available high DOS memory (open to
ISA and PCI buses)
160 KB Video memory and BIOS
640 KB Conventional memory
System Resource
Audio
Audio/parallel port
Diskette drive
Parallel port (for ECP)/audio
Reserved - cascade channel
Open
Open
Open