92 Chapter 2
Block Diagrams
Mnemonics and Connectors
Mnemonic Pin Locations
The following tables, Table 2-2 “A21 Motherboard Mnemonic Locations”
and Table 2-3 “A15 Daughterboard Mnemonic Locations”, list the
signals routed on the motherboard and daughterboard. The source of
the signal is shown in boldface type. If a signal goes to multiple pins on
a connector, the first pin will be shown followed by (...) to indicate the
signal is also located on other pins on this connector. Refer to the pinout
tables of the individual connectors (later in this chapter) for a complete
listing.
Table 2-2 A21 Motherboard Mnemonic Locations
Mnemonic
A21 Motherboard Connector
J2 J5 J6 J7
J8/J13
J14/J15
J9 J10 J11 J12 J16 J17
(AUDIO_
SPKR+) NC
92
(AUDIO_
SPKR-) NC
93
10MHZ_AIF 46 57
10MHZ_CPU 50 51
10MHZ_OPT 48 52
ACOM 4 (...) 2 (...) 1 (...) 1 (...) 1 (...) 1 (...) 35 (...) 1 (...) 1 (...) 49 (...)
AUDIO 62
AUDIO
(LINE_IN_L)
96
AUDIO
(LINE_IN_R)
97
CALOSC_H 44 59
CALOSC_L 43 60
DAUGHTER_OTP 28 40
DCOM 23 (...) 2 (...) 1 (...) 6 (...) 2 (...) 5 (...)
DPT_TRIG1 38
DPT_TRIG2 39
FLOPPY_DCHGL 21 58
FLOPPY_DIRCL 15 50
FLOPPY_DS1L 23 52
FLOPPY_DS3L 17 53
FLOPPY_HSL 1 51
FLOPPY_IDXL 25 57
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