Alto 1822 Interface cable descriptions

These pages describe various cables and connectors used with Alto-1822 interfaces.

Filed on: [Ivy]<Alto-1822>AICables.memo

Last Modified by L. Stewart November 5, 1978 3:51 PM

Alto internal cable 1822 interface (PC version)

One end is a 40 conductor PC edge connector and the other is a DCC-37S. The wire is 40 conductor ribbon cable.

DCC-37SAlto cardSignal
connectorconnectorname
11TYIB’
202TYIB
23+2.4
214GND
35RFNHB’
226RFNHB
47+2.4
238GND
59LIB’
2410LIB
611+2.4
2512GND
713IData’
2614IData
815+2.4
2716GND
917HData’
2818HData
1019GND
2920GND
1121LHB’
3022LHB
1223RFNIB’
3124RFNIB
1325GND
3226GND
1427TYHB’
3328TYHB
1529IRT
3430IMR
1631GND
3532GND
1733blank
3634blank
1835HRT
3736HMR
1937blank

38blankNot wired at DCC-37
39blankNot wired at DCC-37
40blankNot wired at DCC-37



Alto 1822 Interface External Extension Cable

One end is a DCC-37P connector and the other is a DCC-37S. The wire is Belden 8775 - 11 shielded pairs or equivilent. The horizontal lines indicate the pairs and corresponding shields.

DCC-37SWireSignal
connectorcolorname
1RedTYIB’
20BlueTYIB
2+2.4
21ShieldGND
3RedRFNHB’
22GreenRFNHB
4+2.4
23ShieldGND
5WhiteLIB’
24BlackLIB
6+2.4
25ShieldGND
7RedIData’
26WhiteIData
8+2.4
27ShieldGND
9OrangeHData’
28BlackHData
10ShieldGND
29ShieldGND
11RedLHB’
30BlackLHB
12GreenRFNIB’
31BlackRFNIB
13ShieldGND
32ShieldGND
14BrownTYHB’
33BlackTYHB
15RedIRT
34YellowIMR
16ShieldGND
35ShieldGND
17blank
36blank
18BlueHRT
37BlackHMR
19blank


Alto 1822 PRU cable

One end is a DCC-37P connector and the other is a MIL 48-16R18-31P. The wire is Belden 8775 - 11 shielded pairs or equivilent. The horizontal lines indicate the pairs and corresponding shields.

Notes: The Parc PRU cable is wired with all the color pairs reversed and the ASD PRU cable uses a different kind of wire... These colors should be taken only as a recommendation.

DCC-37SPRUWireSignal
connectorconnectorcolorname
16RedTYIB’
205BlueTYIB
2+2.4
2131ShieldGND
38RedRFNHB’
227GreenRFNHB
4+2.4
2331ShieldGND
52WhiteLIB’
241BlackLIB
6+2.4
2531ShieldGND
74RedIData’
263WhiteIData
8+2.4
2731ShieldGND
924OrangeHData’
2823BlackHData
1031ShieldGND
2931ShieldGND
1122RedLHB’
3021BlackLHB
1218GreenRFNIB’
3117BlackRFNIB
1331ShieldGND
3231ShieldGND
1420BrownTYHB’
3319BlackTYHB
1514RedIRT
3413YellowIMR
1631ShieldGND
3531ShieldGND
17blank
36blank
1812BlueHRT
3711BlackHMR
19blank


Alto 1822 interface to IMP adapter Cable

One end is an DBC-25P and the other is a DCC-37P.

All signal pairs such as 20,21 22,23 ...... 34,35 should be twisted pairs. The colors are for the Maxc2 adapter cable. Groups of wires separated by horizontal lines indicate the cable pairing. The colors are only intended as a suggestion. Note that pins 16 and 35 of the DCC-37P are used twice. (This cable is used between Maxc2 and the IMP).

DCC-37P DBC-25PWireSignal name
1 jump to 2TYIB’ - 2.4v

205RedTYIB
2118WhiteGND
3 jump to 4FRNHB’ - 2.4v

227GreenRFNHB
2320BrownGND
5 jump to 6LIB’ - 2.4v

241YellowLIB
2514BrownGND
7 jump to 8IData’ - 2.4v

263OrangeIData
2716BrownGND
288RedHData
1021BrownGND
306VioletLHB
2919WhiteGND
312BlueRFNIB
1315WhiteGND
334GreenTYHB
3217WhiteGND
1511GreenIRT
1624BlackGND
3412RedIMR
1625BlackGND
189YellowHRT
3522BlackGND
3710BlueHMR
3523BlackGND



Alto - 1822 Interface Distant host test plug

This plug loops back the Alto-1822 interface using ’Distant-Host’ signals

Plug type DCC-37P

On the DCC-37P connector Jumper pins
TYIB’1to14TYHB’
TYIB20to33TYHB
RFNHB’3to12RFNIB’
RFNHB22to31RFNIB
LIB’5to11LHB’
LIB24to30LHB
IData’7to9HData’
IData26to28HData
IRT15to18HRT
IMR34to37HMR

Alto - 1822 Interface Local host test plug

This plug loops back the Alto-1822 interface using ’Local-Host’ signals

Plug type DCC-37P

On the DCC-37P connector Jumper pins
TYIB’1to2+2.4v
RFNHB’3to4+2.4v
LIB’5to6+2.4v
IData’7to8+2.4v
TYIB20to33TYHB
RFNHB22to31RFNIB
LIB24to30LHB
IData26to28HData
IRT15to18HRT
IMR34to37HMR



1822 Cable Breakout Box

This is a 122 pin edge-connector wire-wrap board plus several scotchflex to DB-37 adaptors. It is a debugging tool really.

DCC-37Alto cardCard ACard BSignal
connectorconnectorconnectorconnectorname
11123TYIB’
2026284TYIB
23224+2.4
2146385GND
35325RFNHB’
2266486RFNHB
47426+2.4
2386587GND
59527LIB’
24106688LIB
611628+2.4
25126789GND
713729IData’
26146890IData
815830+2.4
27166991GND
917931HData’
28187092HData
10191032GND
29207193GND
11211133LHB’
30227294LHB
12231234RFNIB’
31247395RFNIB
13251335GND
32267496GND
14271436TYHB’
33287597TYHB
15291537IRT
34307698IMR
16311638GND
35327799GND
17331739blank
363478100blank
18351840HRT
373679101HMR
19371941blank

3880102blank
392042blank
4081103blank