Dma Channels; System Interrupts; Input/Output Addresses; System Memory Map - Epson PowerSpan Specifications

EPSON PowerSpan

DMA Channels

DMA channels
Channel
0

System Interrupts

System
Device
IRQ
Parity error
NMI
0 Reserved, interval timer
Reserved, keyboard buffer full
1
2 Reserved, cascade interrupt from slave PIC
3
4
LPT2, if enabled
5
6
7
Real-time clock (RTC)
8
9 User definable; can be set for EISA option cards using the ECU
IO COM3, if enabled; can be set for EISA option cards using the ECU
COM4, if enabled; can be set for EISA option cards using the ECU
11
SCSI controller, if enabled; can be set for EISA option cards using the
ECU
12
Reserved, math coprocessor
13
14 IDE hard drive controller, if enabled
15 User definable; can be set for the following (up to three choices)
using the ECU:
EISA option cards
IDE hard disk drive controller
Built-in video controller; programmable to 9, 10, II, or 15
Built-in SCSI controller; programmable to 9, 10, II, or 15

Input/output Addresses

Input/output addresses
Device
000 - 00F Slave DMA controller 1
Master interrupt controller 1
020 - 021
Configuration controller index registers
026
027 Configuration controller data registers
040 - 043 Interval timer 1
Interval timer 2
048 - 048
Keyboard/mouse controller
060,064
061 NMI and diagnostic pod
Real-time clock
070
070 Enable NMI
Real-time clock
071
078 BIOS loop timer
Power-on diagnostic error codes
080
081 - 08F DMA page register
EPSON PowerSpan-6
Input/output addresses (continued)
Device
OAO - OAI Slave interrupt controller 2
OCO - ODE Master DMA controller 2
Reset numeric coprocessor
OF8 - OFF Numeric coprocessor
IDE hard drive controller
278 - 278 Parallel pod 2 (LPT2); parallel port 3 (PS/2-compatible)
Clock calendar
Serial port 4 (COM4)
Serial port 2 (COM2)
378 - 37F Parallel pod 1 (LPTI); parallel port 2 (PS/2-compatible)
3BC - 3BE Parallel pod 3 (LPTB); parallel port 1 (PS/2-compatible)
3BF - 3DF
Serial port 3 (COM3)
3F0 - 3F5
Serial port 1 (COMI)
400 - 408 Extended DMA controller 1 registers
40C - 40F Extended control/test registers
461 - 464 Extended NMI register
464 - 465 Extended bus master
480 - 48F Extended DMA page register
Extended DMA 2 registers
4D0 Extended interrupt 1
4Dl Extended interrupt 2
Extended DMA 2 chaining
Extended DMA 2 write mode
co2 - co4 System baseboard configuration information
System baseboard enable
Reserved
Built-in SCSI controller

System Memory Map

Starting
address
30000h to
3FFFFh
768KB
300KB
332KB
896KB
928KB
936KB
944KB
10/94
Size Function
3ase memory
3ase memory enabled in
SETUP or the EISA
32KB
shadowed) or built-in SCSI
Adapter BIOS extensions (can
32KB
Adapter BIOS extensions
32KB Built-in video BIOS (can be
shadowed or mapped to
EISA Configuration utility data
Reserved memory
Recovery BIOS