GE V7768 - Table 2-2 V7768;V7769 I;O Address Map

36 V7768/V7769 Hardware Reference Manual
The assigned and user-available I/O addresses are summarized in the I/O Address
Map, Table 2-2.
Table 2-2 V7768/V7769 I/O Address Map
I/O Address Range
Size in
Bytes
HW Device PC/AT Function
$000 - $00F 16 DMA Controller 1
$010 - $01F 16 Reserved
$020 - $021 2 Master Interrupt Controller
$022 - $03F 30 Reserved
$040 - $043 4 Programmable Timer
$044 - $05F 30 Reserved
$060 - $064 5 Keyboard, Speaker, System Configuration
$065 - $06F 11 Reserved
$070 - $071 2 Real-Time Clock
$072 - $07F 14 Reserved
$080 - $08F 16 DMA Page Registers
$090 - $091 2 Reserved
$092 1 Alt. Gate A20/Fast Reset Register
$093 - $09F 11 Reserved
$0A0 - $0A1 2 Slave Interrupt Controller
$0A2 - $0BF 30 Reserved
$0C0 - $0DF 32 DMA Controller 2
$0E0 - $16F 142 Reserved
$170 - $177 8 ICH7-M Secondary Hard Disk Controller
$178 - $1EF 120 User I/O
$1F0 - $1F7 8 ICH7-M Primary Hard Disk Controller
$1F8 - $277 128 User I/O
$278 - $27F 8 I/O Chip Reserved
$280 - $2E7 104 Reserved
$2E8 - $2EE 7 UART* COM4 Serial I/O*
$2EF - $2F7 9 User I/O
$2F8 - $2FE 7 Super I/O Chip COM2 Serial I/O (16550 Compatible)
$2FF - $36F 113 Reserved
$370 - $377 8 Super I/O Chip* Secondary Floppy Disk Controller*
$378 - $37F 8 Super I/O Chip Reserved
$380 - $3E7 108 Reserved
$3E8 - $3EE 7 UART* COM3 Serial I/O*
$3F0 - $3F7 8 Super I/O Chip* Primary Floppy Disk Controller*
$3F8 - $3FE 7 Super I/O Chip COM1 Serial I/O (16550 Compatible)
$3FF - $4FF 256 Reserved
$500 - $CFF 2048 Reserved
*While these I/O ports are reserved for the listed functions, they are not implemented on the V7768/
V7769. They are listed here to make the user aware of the standard PC usage of these ports.