 146 pin PC/104 16 bit connector | Differences from ISA are: - Reduced form-factor to 90 by 96 mm.
- Eliminated the need for backplanes or card cages, through its self-stacking bus
- Minimized component count and power consumption (to typically 1-2 Watts per module), by reducing required bus drive on most signals to 4 mA.
PC/104 modules can be of two bus types, 8-bit and 16-bit. These correspond to the PC and
PC/AT buses, respectively.
|
Pin
|
J1/P1
|
J1/P1
|
J2/P2 (16-bit modules only)
|
J2/P2 (16-bit modules only) |
|
Number
|
Row A |
Row B |
Row C1
|
Row D1 |
|
0 |
--
|
--
|
0V
|
0V
|
|
1 |
IOCHCHK*
|
0V
|
SBHE*
|
MEMCS16*
|
|
2 |
SD7
|
RESETDRV
|
LA23
|
IOCS16*
|
|
3 |
SD6
|
+5V
|
LA22
|
IRQ10
|
|
4 |
SD5
|
IRQ9
|
LA21
|
IRQ11
|
|
5 |
SD4
|
-5V
|
LA20
|
IRQ12
|
|
6 |
SD3
|
DRQ2
|
LA19
|
IRQ15
|
|
7 |
SD2
|
-12V
|
LA18
|
IRQ14
|
|
8 |
SD1
|
ENDXFR*
|
LA17
|
DACK0*
|
|
9 |
SD0
|
+12V
|
MEMR*
|
DRQ0
|
|
10
|
IOCHRDY
|
(KEY)2
|
MEMW*
|
DACK5*
|
|
11
|
AEN
|
SMEMW*
|
SD8
|
DRQ5
|
|
12
|
SA19
|
SMEMR*
|
SD9
|
DACK6*
|
|
13
|
SA18
|
IOW*
|
SD10
|
DRQ6
|
|
14
|
SA17
|
IOR*
|
SD11
|
DACK7*
|
|
15
|
SA16
|
DACK3*
|
SD12
|
DRQ7
|
|
16
|
SA15
|
DRQ3
|
SD13
|
+5V
|
|
17
|
SA14
|
DACK1*
|
SD14
|
MASTER*
|
|
18
|
SA13
|
DRQ1
|
SD15
|
0V
|
|
19
|
SA12
|
REFRESH*
|
|
(KEY)2 0V
|
|
20
|
SA11
|
SYSCLK
|
--
|
--
|
|
21
|
SA10
|
IRQ7
|
--
|
--
|
|
22
|
SA9
|
IRQ6
|
--
|
--
|
|
23
|
SA8
|
IRQ5
|
--
|
--
|
|
24
|
SA7
|
IRQ4
|
--
|
--
|
|
25
|
SA6
|
IRQ3
|
--
|
--
|
|
26
|
SA5
|
DACK2*
|
--
|
--
|
|
27
|
SA4
|
TC
|
--
|
--
|
|
28
|
SA3
|
BALE
|
--
|
--
|
|
29
|
SA2
|
+5V
|
--
|
--
|
|
30
|
SA1
|
OSC
|
--
|
--
|
|
31
|
SA0
|
0V
|
--
|
--
|
|
32
|
0V
|
0V
|
--
|
--
|
Rows C and D are not required on 8-bit modules. B10 and C19 are key locations.
Signal timing and function are as specified in ISA specification. Signal source/sink current differ from ISA values. | |
