EPSON PowerSpan
DMA Channels
DMA channels
Channel
0
Function
Option card
System Interrupts
System
IRQ
NMI
0
1
2
3
4
5
6
7
8
9
IO
11
12
13
14
15
Device
Parity error
Reserved, interval timer
Reserved, keyboard buffer full
Reserved, cascade interrupt from slave PIC
serial pod 2
if enabled
serial pod 1
if enabled
LPT2, if enabled
diskette drive controller, if enabled
if enabled
Real-time clock (RTC)
User definable; can be set for EISA option cards using the ECU
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
SCSI controller, if enabled; can be set for EISA option cards using the
ECU
mouse pod, if enabled
Reserved, math coprocessor
IDE hard drive controller, if enabled
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
address
000 00F
020 021
026
027
040 043
048
060,064
061
070
070
071
078
080
081
Device
Slave DMA controller 1
Master interrupt controller 1
Configuration controller index registers
Configuration controller data registers
Interval timer 1
Interval timer 2
Keyboard/mouse controller
NMI and diagnostic pod
Real-time clock
Enable NMI
Real-time clock
BIOS loop timer
Power-on diagnostic error codes
DMA register
page
Input/output addresses (continued)
address
Device
OAO
Slave interrupt controller 2
OCO ODE
Master DMA controller 2
Reset numeric coprocessor
Clock calendar
Numeric coprocessor
IDE hard drive controller
Parallel pod 2 (LPT2); parallel port 3
OF8 OFF
278
2C0 2DF
2EF
2FF
378 37F
3BC 3BE
3BF 3DF
3EF
3F0
3FF
400
40C 40F
461 464
464 465
480
4CE
4D0
4Dl
co2 co4
C83
Serial port 4 (COM4)
Serial port 2 (COM2)
Parallel pod 1
parallel port 2
video registers
Parallel pod 3
parallel port 1
registers
Serial port 3 (COM3)
diskette controller
IDE hard drive controller
IDE read
diskette controller read/write
Serial port 1
Extended DMA controller 1 registers
Extended control/test registers
Extended NMI register
Extended bus master
Extended DMA page register
Extended DMA 2 registers
Extended interrupt 1
Extended interrupt 2
Extended DMA 2 chaining
Extended DMA 2 write mode
System baseboard configuration information
baseboard EISA ID
System baseboard enable
Reserved
Built-in SCSI controller
System Memory Map
Starting
address
768KB
300KB
332KB
896KB
928KB
936KB
944KB
address
to
30000h to
3FFFFh
to
to
to
to
to
to
to
to
Size
32KB
32KB
32KB
Function
3ase memory
3ase memory enabled in
SETUP or the EISA
utility
display RAM
video BIOS (can be
shadowed) or built-in SCSI
(can be shadowed)
Adapter BIOS extensions (can
shadowed)
Adapter BIOS extensions
Built-in video BIOS (can be
shadowed or mapped to
EISA Configuration utility data
Reserved memory
Recovery BIOS
EPSON PowerSpan-6
10/94
