A.2 Disk Drivers
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This section lists the function codes and function modifiers for the disk drivers.
| Functions | Arguments | Modifiers |
|---|---|---|
IO$_READVBLK IO$_READLBLK IO$_READPBLK IO$_WRITEVBLK IO$_WRITELBLK IO$_WRITEPBLK | P1 — buffer address P2 — byte count P3 — disk address | IO$M_INHSEEK[7] IO$M_DATACHECK[8] IO$M_DELDATA[9] IO$M_INHRETRY IO$M_ERASE[10] |
IO$_WRITECHECK | P1 — buffer address P2 — byte count P3 — disk address | None |
IO$_SENSECHAR IO$_SENSEMODE IO$_PACKACK IO$_AVAILABLE IO$_UNLOAD | None | None |
IO$_SEARCH | P1 — read/write head position | None |
IO$_SEEK | P1 — seek to specified cylinder | None |
IO$_FORMAT[11] | P1 — RX02 density | None |
IO$_SETPRFPATH | P1 — node or HSx name | IO$_FORCEPATH |
IO$_CREATE IO$_ACCESS IO$_DEACCESS IO$_MODIFY IO$_DELETE IO$_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$M_CREATE IO$M_ACCESS IO$M_DELETE IO$M_DMOUNT |
[7] Only for IO$_READPBLK and IO$_WRITEPBLK (not for TU58, RX01, RX02, RB02, or RL02) [8] Not for RX01 and RX02 [9] Only for IO$_RWRITEPBLK on RX02 [10] Only for write functions [11] Not for DSA disks | ||