A.3 Magnetic Tape Drivers
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This section lists the function codes and function modifiers for the magnetic tape drivers.
| Functions | Arguments | Modifiers |
|---|---|---|
IO$_READVBLK IO$_READLBLK IO$_READPBLK | P1 — buffer address P2 — byte count | IO$M_DATACHECK[12] IO$M_INHRETRY IO$M_REVERSE[13] |
IO$_WRITEVBLK IO$_WRITELBLK IO$_WRITEPBLK | P1 — buffer address P2 — byte count | IO$M_DATACHECK[12] IO$M_INHRETRY IO$M_INHEXTGAP[14] IO$M_NOWAIT[15] IO$M_ERASE[16] |
IO$_SETMODE IO$_SETCHAR | P1 — characteristics buffer address P2 — characteristics buffer length[17] | |
IO$_CREATE IO$_ACCESS IO$_DEACCESS IO$_MODIFY IO$_ACPCONTROL | P1 — FIB descriptor address P2 — file name string address P3 — result string length address P4 — result string descriptor address P5 — attribute list address | IO$M_CREATE[18] IO$M_ACCESS[18] IO$M_DMOUNT[19] |
IO$_SKIPFILE | P1 — skip n tape marks | IO$M_ALLOWFAST[20] IO$M_INHRETRY IO$M_NOWAIT[15] |
IO$_SKIPRECORD | P1 — skip n blocks | IO$M_INHRETRY IO$M_NOWAIT[15] |
IO$_REWIND IO$_REWINDOFF IO$_UNLOAD | None | IO$M_INHRETRY IO$M_NOWAIT[15] IO$M_RETENSION |
IO$_WRITEOF | None | IO$M_INHEXTGAP[14] IO$M_INHRETRY IO$M_NOWAIT[15] |
IO$_SENSEMODE IO$_SENSECHAR | P1 — characteristics buffer address[17] P2 — characteristics buffer length[17] | IO$M_INHRETRY |
IO$_DSE[21] IO$_PACKACK IO$_AVAILABLE | None | None |
[12] Not for TS04 and TU80 [13] Not for TK50 [14] Only for TE16, TU45, and TU77 [15] Only for TU81-Plus drives [16] IO$M_REASE takes no arguments; only for IO$_WRITEBLK and IO$_WRITEPBLK on TMSCP drives. [17] Only for TMSCP drives [18] Only for IO$_CREATE and IO$_ACCESS [19] Only for IO$_ACPCONTROL [20] Only for local SCSI drives [21] Only for TU78, TU81, TA81, and TA78 | ||