This is Google's cache of http://pic.dhe.ibm.com/infocenter/zos/v1r12/topic/com.ibm.zos.r12.istdgn1/ch11.htm . It is a snapshot of the page as it appeared on 7 Oct 2013 09:52:06 GMTI Googled for "channel-to-channel" and "channel commands" and either "ccw' or "ccws" and found this: http://webcache.googleusercontent.com/search?q=cache:yYVpIYj2xZAJ:pic.dhe.ibm.com/infocenter/zos/v1r12/topic/com.ibm.zos.r12.istdgn1/ch11.htm+&cd=2&hl=en&ct=clnk&gl=ca I could not get access to this, but I did get to this cached copy of it: This is Google's cache of http://pic.dhe.ibm.com/infocenter/zos/v1r12/topic/com.ibm.zos.r12.istdgn1/ch11.htm . It is a snapshot of the page as it appeared on 7 Oct 2013 09:52:06 GMT z/OS V1R12.0 Communications Server SNA Diagnosis Vol 1: Techniques and Procedures Previous topic | Next topic | Contents | Index | Contact z/OS | Library | PDF | BOOK
Channel commands for channel-to-channel (CTC) adapters z/OS V1R12.0 Communications Server SNA Diagnosis Vol 1: Techniques and Procedures GC31-6850-05 Table 24 contains the channel commands used for channel programs between two hosts connected by a channel-to-channel adapter. Note: The Multipath channel (MPC) connection only uses these commands during activation and deactivation. For the channel commands used for data flow, when the MPC is in the CONTACTED-ACTIVE phase, see Channel programs for multipath channel (MPC) . Table 24. Channel commands for channel-to-channel adapters Command code (hex) Command Description 01 Write Transfers data from storage in this host processor to the CTC adapter (CTCA). For CTCAs, this CCW is used to transfer status information from XCNOCTL, XID information from PIOPOTXT, validity checking information from XCNOVTXT, and data from buffers. Status information, mapped by XCNOCTL, is transferred in the first 8 bytes of the write buffer, and only one write buffer is used. Figure 71 illustrates the buffer usage. For MPC connections this CCW, preceded by a Prepare command, is used to transfer data from the CPNCB transmit buffer. The transmit buffer is defined by YCNOBUF of the YCNCB contained within the CPNCB. The first 8 bytes of the transmit buffer is mapped by ISTBKHDR and contains control information about the current data transfer. Figure 77 illustrates the MPC buffers used for normal data transfer. 02 Read Transfers data from the CTCA to this host processor. For CTCAs, this CCW is used to read status information into XCNICTL, XID information into PIOPITXT, validity checking information into XCNIVTXT, and data into buffers. Status information, mapped by XCNICTL, is transferred in the first 8 bytes of the read buffer, and only one read buffer is used. Figure 71 illustrates the buffer usage. For MPC, this CCW is used to read normal data into the CPNCB transmit buffer. The transmit buffer is defined by YCNIBUF of the YCNCB contained in the CPNCB. Figure 77 illustrates the MPC buffers used for normal data transfer. 03 No-Op Causes the channel to respond with a channel end or device end. It is the last CCW in a read or write chain. The No-Op command does not apply to the MPC connection. 08 TIC Causes the channel program to execute an instruction that is not the next sequential instruction within the channel program sequence. The TIC command does not apply to the MPC connection. 14 Sense Command Byte (SCB) The SCB is normally issued in response to an attention generated when the adapter processes a WCTL from the other side. The SCB clears WCTL from the adapter, allowing the WCTL CCW to complete. 17 Write Control (WCTL) Causes an attention interruption on the other side of the channel-to-channel adapter. The WCTL is issued to alert the other side that a channel program is active at the adapter. 43 Enable Compatibility Mode (ECM) Prepares the adapter to operate in System/360™ (compatibility) mode. The ECM is issued when VTAM gives up control of the adapter. C3 Disable Compatibility Mode (DCM) Prepares the adapter to operate in System/370™ (extended) mode. The DCM is issued when VTAM acquires control of the adapter. E3 Prepare Primes the CTC adapter for the next CCW. This CCW does not cause an attention on the other side of the adapter. The Prepare command applies only to the MPC connection. Notices | Terms of use | Support | Contact z/OS URL: http://webcache.googleusercontent.com/search?q=cache:yYVpIYj2xZAJ:pic.dhe.ibm.com/infocenter/zos/v1r12/topic/com.ibm.zos.r12.istdgn1/ch11.htm+&cd=2&hl=en&ct=clnk&gl=ca Copyright IBM Corporation 1990, 2010 This information center is Built on Eclipse™ ( www.eclipse.org ). There were several other Google hits which I didn't investigate (q.v.). Bill Fairchild Franklin, TN ----- Original Message ----- From: "J Ellis" <jerry.el...@libertymutual.com> To: IBM-MAIN@LISTSERV.UA.EDU Sent: Wednesday, October 23, 2013 9:35:44 AM Subject: old manuals I'm looking for this manual: S/390® I/O Interface Channel to Channel Control Unit OEMI i can find it referenced in hits from google, but can't find the actual manual, any one have any idea where I could get a softcopy of this ? thanks ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
