I/O Map - Epson SCE8720C Series Hardware Manual

1.5 I/O map

The I/O addresses 000h to 0FFh are assigned to the basic I/O. Although the addresses
from 100h to 3FFh are for the ISA bus, SCE8720C has pre-built-in I/O.
These I/O addresses cannot be used when additionally setting I/O. I/O map is as follows:
Table 1.1 I/O map
I/O Address Register
000h-01Fh 00h RW
01h RW
02h RW
03h RW
04h RW
05h RW
06h RW
07h RW
08h WO
08h RO
09h WO
0Ah WO
0Bh WO
0Ch WO
0Dh RO
0Dh WO Temporary Register
0Eh WO
0Fh WO
020h-021h 20h WO
20h WO
20h WO
20h RO
20h RO
21h WO
21h WO
21h WO
21h RW
21h RW
Rev.A
DMA Channel 0 Base and Current
Address
DMA Channel 0 Base and Current Word
DMA Channel 1 Base and Current
Address
DMA Channel 1 Base and Current Word
DMA Channel 2 Base and Current
Address
DMA Channel 2 Base and Current Word
DMA Channel 3 Base and Current
Address
DMA Channel 3 Base and Current Word
Command Resister
Status Register
Request Register
Single-Mask Register
Mode Register
Clear Byte Pointer
Master Clear
Clear Mask Register
Write all Mask Register
Initialization Control Word ICW1
Operation Control Word OCW2
Operation Control Word OCW3
Interrupt Service Resister
Interrupt Request Resister
Initialization Control Word ICW2
Initialization Control Word ICW3
Initialization Control Word ICW4
Operation Control Word OCW1
Interrupt Mask Resister
EPSON
CARD-PCI/GX Hardware Manual
Function
DMA Controller 1
(82C37A
equivalent)
Interrupt
Controller 1
(82C59A
equivalent)
7