Specifications

Operating System Routines
IOC$PURGDATAP
• Stores the contents of the data path register in R1. The driver’s register-
dumping routine writes this value to the error message buffer.
• Clears any purge errors in the data path register.
• Places the appropriate return status in R0.
• Determines the base of UNIBUS or Q22–bus map registers and writes the
value into R2. The driver’s register-dumping routine writes this value to the
error message buffer.
• In some machine implementations, checks for memory errors that might have
occurred during the DMA operation and, if an error is detected, logs it.
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