57
ISA Bus J33 Pinout
Signal
Pin
Signal
Pin
Signal
Pin
Spare
1
SD+(2)
15
Ground
28
IRQ11
2
SD+(3)
16
SA+(4)
29
IRQ4
3
SD+(6)
17
SA+(5)
30
IRQ5
4
SD+(7)
18
SA+(8)
31
0WS-
5
SA+(19)
19
SA+(9)
32
Ground
6
SA+(20)
20
SA+(12)
33
MEMCS16-
7
SA+(23)
21
SA+(13)
34
Ground
8
SBHE-
22
SA+(16)
35
SPKR-
9
SA+(0)
23
AEN
36
Ground
10
Ground
24
IOW-
37
SD+(13)
11
SA+(2)
25
Ground
38
SD+(12)
12
Ground
26
LOBUFDIR
39
SD+(9)
13
ISA BCLK
27
HIBUFDIR
40
SD+(8)
14
Address Configuration
DMA Channels
The system board uses Direct Memory Address (DMA) channels to exchange data without accessing
the CPU. Some channels are assigned for specific use by the system, as defined below. Each DMA
channel appropriates full 32-bit processing. For an ISA bus, channels 0 through 3 are 8-bit and
channels 4 through 7 are 16-bit channels.
DMA
Assignment
DMA
Assignment
0
Spare
4
Cascade input for 0-3
1
Vibra 16C Controller
5
Vibra 16C Controller
2
I/O Controller
6
Spare
3
Parallel Port
7
Spare
Input/Output Addresses
The following table lists a small subset of the reserved I/O addresses.
Address
Device
0278 - 027F
Parallel Port LPT2
02E8 - 02EF
Serial Port COM4
02F8 - 02FF
Serial Port COM2
0378 - 037F
Parallel Port LPT1
03B0 - 03BF
Monochrome Display/Printer Adapter
03C0 - 03CF
Enhanced Graphics Adapter (EGA/VGA)
03D0 - 03DF
Color/Graphics Monitor Adapter (CGA/MCGA)
Содержание TD-x10 Setup
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