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2.2 The IBM 7171 ASCII Device Attachment Control Unit - Index of

2.2 The IBM 7171 ASCII Device Attachment Control Unit - Index of

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9.31 System Error MessagesFollowing is a list <strong>of</strong> System Error Messages, and their associated parameters:Received unsolicited DMA.POCommand from TC, after one shift left.PI SCCOUT, STCCOUT processing flags.P2TC DMA pending, SCRN buffer status flag.Received data or DMA for unconnected line.POCommand from TC, after one shift left.PI SCCOUT, STCCOUT processing flags.P2TC DMA pending, SCRN buffer status flag.CPU sent TC an unsupported command.POCommand from TC, after one shift left.PI SCCOUT, STCCOUT processing flags.P2TC DMA pending, SCRN buffer status flag.KYBD parsed key sequence that generated an invalid routine number.PORegister SI, Address <strong>of</strong> SEQ NODE.PI Register AX before shifting. SEQNCALL that triggered error. AL=routine #.P2AC2WORK, Character that triggered invalid call, last character in inputsequence.Out <strong>of</strong> RAM space.POAmount <strong>of</strong> memory requested.PI SCCOUT, STCCOUT processing flags.P2 TC DMA pending, SCRN buffer status flag.9-38 <strong>IBM</strong> <strong>7171</strong> Reference Manual and Programming Guide

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