SNAX/APC Application Programming Manual

Application Prototype Simulator

SNAX/APC Application Programming Manual—138786

4-60

MC-REQUEST-TO-SEND (F6)

The MC-REQUEST-TO-SEND verb informs the partner TP that the local TP (APS)

wants to enter the Send state. The local TP does not enter the Send state until the

partner TP changes its own state to the Receive state by issuing a MC-RECEIVE-AND-

WAIT verb (or any other verb that causes the partner TP to enter the Receive state). The

MC-REQUEST-TO-SEND verb completes immediately; it does not wait for the partner

TP to change its state to the Receive state.

After issuing the MC-REQUEST-TO-SEND verb, the local TP should continue issuing

MC-RECEIVE-AND-WAIT verbs (or MC-RECEIVE-IMMEDIATE verbs) until the

Data Type field (WHAT-RECEIVED) in the reply returns SEND or CONFIRM-SEND,

which indicates that the partner TP has changed to the Receive state. After receiving

notification of the partner’s state change, the local TP can begin sending data to the

partner TP. Note that the partner TP can remain in the Send state indefinitely after

receiving the REQUEST-TO-SEND notification from the local TP.

Request Fields

The request field for the MC-REQUEST-TO-SEND verb screen has no operator input.

Reply Fields

IPC Return Code

displays the value of HEADER-RETURN-CODE returned in the IPC header reply.

SNAX/APC Application Prototype Simulator (APS) System (T9096D30 22JUN95 F15)

Request: MC_Request_To_Send Resource ID: 0 6 0 0707D

Reply: MC_Request_To_Send

IPC Return Code: 0 IPC Ok

IPC Return Code Detail: 0 IPC Ok

UOWs In: 0001 UOWs Out: 0001

Header Return Code: 0 RC Ok

Request Completed

F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 F13 F14 F15

F16

TPR MAl MDal TPE MR&W MRTS MSD MSE MCnf MCfd MGA MSnd Prnt Hex Rcov

Exit

ActS Dact MPrc MRcI MFls Gtyp GTP A(T) E(T)

Exit