TITLE: INTERFACE GUIDE FOR THE WY-60 TERMINAL ---------------------------------- | WYSE TECHNOLOGY | | TERMINAL INTERFACE GUIDE | ---------------------------------- This document was produced to provide GENERAL interface information for Wyse Terminal products. A successful interface to your computer system involves several different, but related, factors: 1) Correct cable configuration between the two. 2) Correct and compatible operating conditions of the terminal and computer equipment interfaces (i.e. transmission speed, data structure, parity, handshake). 3) Compatible personalities, or compatible modes (WY60, Televideo, VT100, etc.) GENERAL INFORMATION: 1) The WY-60 terminal has a 256 x 8 (2K) Buffer. 2) The WY-60 uses 1 start bit (not changeable). 3) RS-232 communication can usually be established using pins 2(TXD), 3(RXD) and 7(Signal Ground). This is the minimum requirement for software handshaking (X-ON/X-OFF or XPC). If you wish to configure for hardware handshake, pin 20 (DTR) additionally must be connected. Be cautious with extra pins connected between the two, as they may cause communications problems if not connected properly. For example, pins 4(RTS), 8(DCD), or 20(DTR) held low will cause the terminal to be "busy". 4) Hardware handshaking is always BUSY=LOW/READY=HIGH. This means that if you have set hardware handshaking and you have connected pin 20(DTR), this signal going low will cause the terminal to NOT receive data. 5) Software handshaking is either Xon/Xoff (ASCII/ANSI) or Xpc (PCTERM). These options are selectable in the WY-60 setup menu located in "COMM". To use Xpc handshake, Receive Handshake must be set to Xon/Xoff, and Xpc Handshake must be set to ON. 6) When connecting a printer, hardware handshaking is more reliable and faster than software handshaking. Also, be sure to check the printer's users guide to set up the printer to match the terminal. Baud rate, data bits, parity, stop bits and handshake must match each other. 7) Signal ground is internally connected to frame ground on the WY-60 terminal. SPECIFIC PORT INFORMATION: Number of Ports: 2 Communications by default to computer equipment is by the MODEM port as the main port. This is changeable in setup "GENERAL" DATA/PRINTER=MODEM/AUX). The AUX Port can be defined as the main port (DATA/PRINTER=AUX/MODEM). PIN DEFINITIONS, MODEM PORT: 1 - FRAME GROUND 2 - TRANSMIT DATA (TXD) OUTPUT 3 - RECEIVE DATA (RXD) INPUT 4 - REQUEST TO SEND (RTS) OUTPUT 5 - CLEAR TO SEND (CTS) INPUT 6 - DATA SET READY (DSR) Not Functional 7 - SIGNAL GROUND 8 - DATA CARRIER DETECT (DCD) INPUT 20- DATA TERMINAL READY (DTR) OUTPUT PIN DEFINITIONS, AUX PORT: 1 - FRAME GROUND 2 - RECEIVE DATA (RXD) INPUT 3 - TRANSMIT DATA (TXD) OUTPUT 6 - DATA TERMINAL READY (DTR) OUTPUT 7 - SIGNAL GROUND 20- DATA SET READY (DSR) INPUT Pins 4,5, and 8 are not functional on the WY-60 AUX Port. NOTE: THE FOLLOWING DIAGRAMS ARE PROVIDED AS POSSIBLE EXAMPLES. YOUR COMPUTER EQUIPMENT MAY HAVE DIFFERENT PIN DEFINITIONS. -------------------------------------------------------------------------- FIGURE 1. SAMPLE CONNECTIONS MODEM PORT=MAIN PORT DB25F(WY60) DB25(HOST) | DB25F(WY60) DB25F(MODEM) ---------- -------- | ---------- -------- | (FGD)1 |---------| 1(FGD) | | | (FGD)1 |-------| 1(FGD) | | (TXD)2 ->|---------| 3(RXD) | | | (TXD)2 ->|-------| 2(TXD) | | (RXD)3 <-|---------| 2(TXD) | | | (RXD)3 <-|-------| 3(RXD) | | (SGD)7 |---------| 7(SGD) | | | (RTS)4 ->|-------| 4(RTS) | |(DTR)20 ->|*-------*| 6(DSR) | | | (CTS)5 <-|-------| 5(CTS) | ---------- -------- | | (SGD)7 |-------| 7(SGD) | MODEM PORT COMM PORT | | (DCD)8 <-|-------| 8(DCD) | CONNECTION TO A COMPUTER | |(DTR)20 ->|-------| 20(DTR)| * Optional Hardware H/S | ---------- -------- | MODEM PORT COMM PORT | CONNECTION TO A MODEM -------------------------------------------------------------------------- -------------------------------------------------------------------------- FIGURE 2. OTHER COMMON CONNECTIONS MODEM PORT=MAIN PORT DB25F(WY60) COMPUTER DB-9 | DB25F(WY60) COMPUTER RJ-11 ---------- -------- | ---------- -------- | (TXD)2 ->|---------| 2(RXD) | | | (FGD)1 |-------| 4(FGD) | | (RXD)3 <-|---------| 3(TXD) | | | (TXD)2 ->|-------| 2(RXD) | | (SGD)7 |---------| 7(SGD) | | | (RXD)3 <-|-------| 5(TXD) | |(DTR)20 ->|*-------*| 6(DSR) | | | | | | | | | | | | | | | ---------- -------- | | (SGD)7 |-------| 3(SGD) | MODEM PORT COMM PORT | | | | | Connection To DB-9 Adapter | |(DTR)20 ->|*-----*| 6(DTR) | * Optional Hardware H/S | ---------- -------- | MODEM PORT COMM PORT | Connection To RJ-11 Adapter -------------------------------------------------------------------------- When selecting the AUX port as the main port (DATA/PRINTER = AUX/MODEM), be advised that only pins 1(FGD), 2(RXD), 3(TXD), 6(DSR), and 20(DTR) are used by the AUX Port. Pins 4,5, and 8 are not internally connected, and have no effect. Notice, too, that a different cable is required to connect the AUX Port to the computer system or printer. (See Figure 3.) -------------------------------------------------------------------------- FIGURE 3. TYPICAL CONNECTIONS TO THE AUX PORT DB25F(WY60) DB25 HOST | DB25F(WY60) PRINTER DB25 ---------- -------- | ---------- -------- | (FGD)1 |---------| 1(FGD) | | | (FGD)1 |-------| 1(FGD) | | (RXD)2 <-|---------| 2(TXD) | | | (RXD)2 <-|-------| 2(TXD) | | (TXD)3 ->|---------| 3(RXD) | | | (TXD)3 ->|-------| 3(RXD) | | (DTR)6 ->|*-------*| 6(DSR) | | | | | | | (SGD)7 |---------| 7(SGD) | | | (DTR)6 ->|-------| 6(DSR) | |(DSR)20 <-|*-------*| 20(DTR)| | | (SGD)7 |-------| 7(SGD) | ---------- -------- | | | | | AUX PORT COMM PORT | |(DSR)20 <-|-------| 20(DTR)| Connection To Computer | ---------- -------- * Optional Hardware H/S | AUX PORT | Typical Serial Printer Connection -------------------------------------------------------------------------- FLOW CONTROL (HANDSHAKE): Host connection to the MODEM port (DATA/PRINTER=MODEM/AUX): RCV HANDSHAKE=(COMM in setup) NONE No handshaking used on the MODEM port. XON/XOFF XON/XOFF handshaking used on the modem port. DTR DTR controls handshaking on the modem port. BOTH Both types of handshaking are utilized. For Xpc Handshaking, see note 5 under General Information. Host connection to the AUX port (DATA/PRINTER=AUX/MODEM): AUX RCV HANDSHAKE = (COMM in setup) NONE No handshaking used on the AUX port. XON/XOFF XON/XOFF handshaking used on the AUX port. DSR DSR controls handshaking on the AUX port. BOTH Both types of handshaking are utilized. For Xpc Handshaking, see note 5 under General Information. Printer connection to the AUX port (DATA/PRINTER=MODEM/AUX): AUX XMT HANDSHAKE = (COMM in setup) NONE DTR controls handshaking on the AUX port. XON/XOFF Both types of handshaking are utilized. NOTE: DTR Xmit Handshake is always active for the AUX port. Printer connection to the MODEM port (DATA/PRINTER=AUX/MODEM): XMT HANDSHAKE = (COMM in setup) NONE DSR controls handshaking on the MODEM port. XON/XOFF Both types of handshaking are utilized. DSR Xmit Handshake is always active for the modem port. ADDITIONAL INFORMATION: High Water Mark ------------------ 192 Characters (75%) Low Water Mark ------------------- 64 Characters (25%) Maximum Baud Rate ---------------- 38,400 (Modem Port) 19,200 (Aux Port) Data Bits ------------------------ 7 or 8 Stop Bits ------------------------ 1 or 2 Parity --------------------------- None, Odd, Even, or Mark COMMON PROBLEMS AND HELPFUL HINTS FOR SOLVING COMMUNICATION PROBLEMS ON THE WY-60 1) XMT Handshake = ON may cause the terminal to stop processing and should only be set to ON if your computer equipment supports this feature. Adds, Data General, and PC Graphics personalities should never have XMT handshake set to ON. 2) When cabling a printer to the WY-60, follow these steps: A) Determine the handshake that the serial printer uses. Hardware handshake (DSR/DTR) is always recommended, if possible. Check the printer's manual to set this up. Many printers are configure-able by switches, etc. B) If the printer is using hardware handshaking, determine which pin on the printer interface is controlling the data flow. Check the manual to determine this. The signal must be BUSY=LOW/READY=HIGH. C) Check to see if the printer has a variable input buffer level. If it does, setup the printer to handshake at the lowest level. D) Be sure that the Transmit and Receive signals are connected correctly between the terminal and the printer. A quick check for accuracy in cabling can be determined by doing a local Print Screen. In native (WY60) personality, press the <.> keys. (The one on the Numeric Keypad). If you have anything on the screen, it should be sent out to the printer. If it prints, but is "garbled", then the connections are correct. Check the Baud Rate, data-bits, parity, etc. E) Check to insure correct handshaking has been setup for both the printer and modem ports. (Incorrect setup between the HOST SYSTEM and the TERMINAL may cause buffering problems when PRINTING!) 3) Make sure that your operating system and the terminal are using the same handshaking. For example: Some systems, such as UNIX and Xenix, can use XOFF/XANY handshaking which is similar to, but not the same as XON/XOFF handshaking. 4) The maximum distance standard for RS-232 cables is 50 feet, but with good shielded cable, this can be extended further. 5) Most modems default to XON/XOFF software handshaking. When using PC-TERM personality, the XON and XOFF code values must be replaced with the Xpc ON and OFF values. 6) Connecting pin 1 on the interface may cause current flow between the terminal and the other device, and may cause problems. If your computer device must have independent signal and frame grounds, only connect pin 1 to the terminal. *************************************************************** * INTERFACE GUIDE FOR THE WY-60 TERMINAL WITH PARALLEL OPTION * * (ONLY FOR TERMINALS WITH THE PARALLEL OPTION INSTALLED) * *************************************************************** With the PARALLEL OPTION installed in the terminal, only parallel printers may be attached to the aux port. The connector looks identical to the serial port (DB-25F). If you are unsure whether or not the parallel port is installed, enter setup on the terminal and look at , The COMM menu. Any LACK of reference to the AUX port Baud- Rate, etc. means that the AUX port is parallel. SPECIFIC PORT INFORMATION: Number of Ports: 2 (One Serial, One Parallel with option installed) Communications to the computer equipment is by the MODEM port only as the main port. PIN DEFINITIONS AND CONNECTION, AUX PORT (Parallel option installed): NOTE: THE FOLLOWING DIAGRAM IS PROVIDED AS A POSSIBLE EXAMPLE. YOUR PRINTER EQUIPMENT MAY HAVE DIFFERENT PIN DEFINITIONS. -------------------------------------------------------------------------- WY60 PARALLEL PORT (DB25F) CENTRONIX PARALLEL PRINTER ---------- ------ | -> 1|-------(-STROBE)---------------| 1 | | -> 2|-------(+DATA BIT 0)-----------| 2 | | -> 3|-------(+DATA BIT 1)-----------| 3 | | -> 4|-------(+DATA BIT 2)-----------| 4 | A | -> 5|-------(+DATA BIT 3)-----------| 5 | M 3 | -> 6|-------(+DATA BIT 4)-----------| 6 | P 6 | -> 7|-------(+DATA BIT 5)-----------| 7 | H | -> 8|-------(+DATA BIT 6)-----------| 8 | E P | -> 9|-------(+DATA BIT 7)-----------| 9 | N I | <- 10|-------(-ACKNOWLEDGE)----------|10 | O N | <- 11|-------(+BUSY)-----------------|11 | L | <- 12|-------(+PAPER END)------------|12 | | <- 13|-------(+SELECT)---------------|36 | | -> 14|-------(-AUTO FEED)------------|14 | | <- 15|-------(-ERROR)----------------|32 | | -> 16|-------(-INITIALIZE PRINTER)---|31 | | -> 17|-------(-SELECT INPUT)---------|36 | |18-25------- | | | | | | | | | /// (GROUND) | | ---------- ------ ------------------------------------------------------------------------- FLOW CONTROL (HANDSHAKE): AUX Port handshaking is handled through the control lines on the parallel interface and device. There are no selections in setup to control this feature. =-=-=-=-=-=-=-=-=-=-=-=-= DISCLAIMER =-=-=-=-=-=-=-=-=-=-=-=-=-=-= This information is intended to inform WYSE personnel and WYSE customers of certain issues in a timely fashion. The information has not been extensively verified or tested. WYSE does not warrant the information to be correct, although reasonable effort has been taken to prevent gross inaccuracies. WYSE publishes formal technical communiques in the form of Product Bulletins and warrants the data in Product Bulletins to be accurate at the time of the release.