Conventional Memories

This page is part of my Toshiba E.M.I.S. archive project, to learn more please visit the project page, Some of the files from the Toshiba BBS referenced here can also be found there.

Index

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Cable Wirings

Computer to Data Modem Cable

Computer Modem
DTE DCE
25p--9p 25p
2 -- 3 TXD------ 2
3 -- 2 RXD------ 3
4 -- 7 RTS------ 4
5 -- 8 CTS------ 5
6 -- 6 DSR------ 6
7 -- 5 GND------ 7
8 -- 1 DCD------ 8
20 -- 4 DTR------ 20
22 -- 9 RI------- 22

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LapLink Serial Cable Parallel Cable LapLink MS-DOS Link
25pin--9p 9pin
1 -- 1
RXD 3 -- 2 3 TXD 2 -- 15
TXD 2 -- 3 2 RXD 3 -- 13
DTR 20 -- 4 6 DSR 4 -- 12
GND 7 -- 5 5 GND 5 -- 10
DSR 6 -- 6 4 DTR 6 -- 11
RTS 4 -- 7 8 CTS 10 -- 5
CTS 5 -- 8 7 RTS 11 -- 6
12 -- 4
13 -- 3
14 -- 14
15 -- 2
16 -- 16
17 -- 17
25 -- GND -- 25

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BASIC RS-232 IBM-->Centronics
(DCE perspective) 25pin--36pin
IEEE-P1284-A/B
1 -- strobe -- 1
1 FG frame ground 2 -- D0 -- 2
2 -> TD transmit data 3 -- D1 -- 3
3 <- RD received data 4 -- D2 -- 4
4 -> RTS request to send 5 -- D3 -- 5
5 <- CTS clear to send 6 -- D4 -- 6
6 <- DSR data set ready 7 -- D5 -- 7
7 SG signal ground 8 -- D6 -- 8
8 <- DCD data carrier detect 9 -- D7 -- 9
20-> DTR data terminal ready 10 -- ack -- 10
0 = +3 to +15V 11 -- busy -- 11
1 = -3 to -15V 12 -- paper -- 12
13 -- select -- 13
14 -- alf -- 14
15 -- error -- 32
16 -- init -- 31
17 -- select -- 36
18-25-GND---

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9-Pin to 25-Pin Conversion

9-pin,female 25-pin, male
Connector Connector
1 Data Carrier Detect 8
2 Receive Data 3
3 Transmit Data 2
4 Data Terminal Ready 20
5 Ground 7
6 Data Set Ready 6
7 Request To Send 4
8 Clear To Send 5
9 Ring Indicator 22