HP 271308 Technical Reference Manual page 4

CONTENTS (Cont.)
Priority Interrupt Structure ........................................... 3-27
Wait State Circuits for Interrupt Ack .................................. 3-27
Diagnostic Hood for External Loop Back
3-28
Section IV
PROGRAM1ING
MUX PROGRAf'tT1ABLE FEATURES ................................................. 4-1
Transactions 4-2
Connect Logical Channel Reguest Format .................................... 4-2
Capabi lit ies 4-3
Receive Character Processing ............................................ 4-3
Receive Error Conditions
4-5
Signal Character ........................................................ 4-5
Edi t Mode 4-5
Bac k space ............................................................. 4-5
Line Deletion 4-6
Software Handshake with the Device ...........................
~
.......... 4-6
Host ENQ/ACK Handshake 4-7
Device X-ON/X-OFF Handshake ........................................... 4-7
Host X-ON/X-OFF Handshake 4-8
Si ngle Text Termi nat ion ................................................. 4-8
End-On-Count Text Termination 4-8
Ale r t 1 Mo de. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 9
Type Ahead and Echoing 4-9
Receiving Transparent or Binary Data ................................... 4-10
Read Reguest Length 4-10
Host Initiated Text Termination ........................................ 4-11
Transmit Character Processing 4-11
Automatic Output Separators Appendage .................................. 4-12
Transmitting Transparent or Binary Data
4-12
Buffer Flushing 4-12
Prograrrmi ng the Receiver and Transmi tter ................................... 4-12
Parity in Transmitted or Received data
4-13
Break Detection 4-13
Handshake Timer ...................................................•...... 4-14
Additional Options
4-14
Error Handling ..................•...............................•...... 4-14
Quoting Character Mode Option 4-17
Condi tional Output Separators Appendage ................................ 4-17
Speed Sense Mode
4-17
Asynchronous Event s ...................................................... 4-17
Solicited Events 4-18
Diagnostics .............................................................. 4-18
Connect Logical Channel Reguest Definitions 4-19
Read Device Data, Request Code
=
1 ..................................... 4-19
Write Device Data, Reguest Code
=
2 4-20
Read Card Information, Request Code
=
4 ................................ 4-20
Subfunctions 0 through 33 4-20
Subfunct ion 249 - Read Data Status ................................... 4-21
Subfunction 250. Get Card RAM 4-21
Subfunction 254. Get Card Status .................................... 4-21
Write Card Configuration, Reguest Code
=
5 4-22
Subfunction 0 ........................................................ 4-23
Subfunction ................................................................ 4-25
1. Configure Read Option 4-25
2. End-On-Cou nt Length .......................... , ; ................... 4-26
3. Alert 1 Read Mode 4-26
IV