Universal PMAC Lite
Jumpers Setup Summary
13
From Address to Jumper Configuration
Once an I/O address on the PC expansion port has been selected, the following procedure can be used for
setting the address jumpers.
1. Convert the address to a 3-digital hexadecimal value ($000 to $FFF, representing 0 to 4095). If the
value does not fit in this range, you will not be able to set PMAC for this address. Make sure the last
digit is 0; only addresses divisible by 16 are permitted as PMAC base addresses.
2. Take the first hex digit and convert it to binary. The binary digits represent bits 11 through 8 of the
base address. Assign each binary digit to jumpers as follows:
Bit #
11(MSB) 10
9 8(LSB)
Jumper
E91 E92 E66 E67
Digit Value
8 4 2 1
Setting for 1
OFF OFF OFF OFF
Setting for 0
ON ON ON ON
3. Take the second hex digit and convert it to binary. The binary digits represent bits 7 through 4 of the
base address. Assign each binary digit to jumpers as follows:
Bit #
7(MSB) 6
5 4(LSB)
Jumper
E68 E69 E70 E71
Digit Value
8 4 2 1
Setting for 1
OFF OFF OFF OFF
Setting for 0
ON ON ON ON
Example 1:
To set up the card to be at base address 992 decimal on the PC expansion bus.
1. 992 decimal is equal to 3E0 hexadecimal.
2. The first digit of 3 is binary 0011. This sets E91 ON, E92 ON, E66 OFF, and E67 OFF.
3. The second digit of E is binary 1110. This sets E68 OFF, E69 OFF, E70 OFF, and E71 ON.
Example 2:
To set up the card to be at base address 528 decimal on the PC expansion bus.
1. 528 decimal is equal to 210 hexadecimal.
2. The first digit of 2 is binary 0010. This sets E91 ON, E92 ON, E66 OFF, and E67 ON.
3. The second digit of E is binary 0001. This sets E68 ON, E69 ON, E70 ON, and E71 OFF.
Example 3:
To set up the card to be at base address 544 decimal on the PC expansion bus.
1. 544 decimal is equal to 220 hexadecimal.
2. The first digit of 2 is binary 0010. This sets E91 ON, E92 ON, E66 OFF, and E67 ON.
3. The second digit of E is binary 0010. This sets E68 ON, E69 ON, E70 OFF, and E71 ON.
E54-E55, E57-E59, E61-63, E65: Interrupt Source Control
– These jumpers control which signals are
tied to interrupt lines IR5, IR6 and IR7 on PMAC’s programmable interrupt controller (PIC), as shown in
the interrupt diagram. Only one signal may be tied into each of these lines.
E76-E84, E86: Host Interrupt Signal Select
– This bank of jumpers determines which ISA bus interrupt
line can be used by the PMAC PC, as shown in the interrupt diagram. Only one of these sets of jumpers
should be on in any configuration.
E107-E108: Serial Port Configure
– Both RS-232 and RS-422 ports are always provided, and jumpers
must be set correctly to use the port of your choice. Jumpers E107 and E108 must connect pins 1 and 2 to
use the RS-232 port on the J4 connector; jumpers E107 and E108 must connect pins 2 and 3 to use the
RS-422 port on the J4A connector.
Содержание Universal PMAC Lite
Страница 7: ...Universal PMAC Lite Table of Contents iv...
Страница 14: ...Universal PMAC Lite Introduction 7 Universal PMAC Lite Dimensions Part Number 602402...
Страница 15: ...Universal PMAC Lite 8 Introduction...
Страница 23: ...Universal PMAC Lite Jumpers Setup Summary 16...
Страница 49: ...Universal PMAC Lite Machine Connections 42...
Страница 51: ...Universal PMAC Lite Host PC AT I O Address Map 44...
