Intel's Multibus - Tektronix PM 101 Instruction Manual

Operating Instructions-PM 101
decision was made in the Format Mode. Such a table may
be of great assistance in correctly programming the word
recognizer.
®

Intel's Multibus

. The Intel MULTIBUS consists of a
network of signal lines in the following categories: 20
address lines, 16 bidirectional data lines, 8 multilevel
interrupt lines, and several bus control, timing and power
supply Ii nes. The data and address Ii nes are driven by 3-
state devices. The interrupt and some other control lines
are open-collector driven.
The MULTIBUS is compatible with 8- or 16-bit
processors with data rates up to 5 MHz. While data is
transferred asynchronously,
Acknowledge Signal, can be used as clock for bus traffic.
Table 2-1 gives a typical monitoring example for a user
primarily interested in address and data information:
TABLE 2-1
TYPICAL CONNECTIONS
PM101/7D02 Channels
Address 0
1
2
3
4
5
6
7
8
9
1 0
11
12
13
14
15
16
17
18
19
2 0
21
22
23
2-6
XACK, the Transfer
Pin# Signal Name
57 ADR 0
58 ADR1
55 ADR2
56
ADR3
53 ADR4
54 ADR5
51 ADR6
52 ADR7
ADR8
49
50 ADR9
47 ADRA
48 ADRB
45 ADRC
46 ADRD
43
ADRE
44 ADRF
ADR1 0
28
30 ADR11
32 ADR12
34 ADR13
27 SHEN
spare
spare
spare
TABLE 2-1 (cont)
PM 101/7D02 Channels
DATA 0
1
2
3
4
5
6
7
8
9
1 0
11
12
13
14
15
CLOCK CLK
CONTROL
0
1
2
3
4
5
/STOP S.U.T.
In the Main Trigger section, choose the USER CLOCK
QUAL. and FALLING EDGE OF CLOCK alternatives.
Leave all other choices in their default states.
The data gathered will include all reads and writes to
memory, all reads and writes to input-output devices and
the Interrupt Response/ Acknowledge cycle.
This set-up does not provide information about which
cycle is an Instruction Fetch, which master is controlling
the bus, or when an interrupt occurs. The spare channels
can be used to ascertain which master is controlling and
when interrupts occur, if desired.
The example given was for a 16-bit system. The extra
Ii nes available when the PM 101 is used with an 8-bit
system can be used to derive much more system status
and control line information. Particular choices vary with
the user's needs and perspective.
Pin#
Signal Name
73 DAT 0
74
DAT1
71 DAT2
72 DAT3
69
DAT4
70 OATS
67 DAT6
68
DAT?
65 DAT8
66
DAT9
63 DAT1 0
64 DAT11
61 DAT12
62
DAT13
59 DAT14
60
DAT15
23 XACK
19
MRDC
20 MWTC
21 IORC
22 IOWC
spare
spare
not used
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