75
• JMP 2055,I — the disc read succeeded.
5.4.3 Tracing and Registers
When a debug log has been established, tracing may be configured by specifying one or more of the reporting level
options:
Option Reporting Level
RWSC
Controller read, write, status, and control commands
CMDS
Interface commands received from the CPU
CPU
Words received from and sent to the CPU
BUF
Data read from and written to the interface FIFO
XFER
Data received and transmitted via HP-IB
SERV
Disc unit service events
IOBUS
I/O bus signals and data words received and returned
The RWSC option traces the read, write, status, and control commands executed by the disc controller. The
CMDS option traces the commands executed by the interface. The CPU option traces words received from (control
and write data) and sent to (status and read data) the CPU. The BUF option traces loads into and unloads from the
interface FIFO. The XFER option traces the data words read from or written to the disc. The IOBUS option traces
the I/O backplane signals and data received and returned via the interface.
Examples of the trace formats follow:
>>DA rwsc: Unit 1 position 1069056 seek disc command initiated
>>DA rwsc: Unit 1 seek disc command completed
>>DA cmds: [STC] Control set (data mode)
>>DA cmds: SRQ cleared
>>DA cpu: [OTx] Control = 004003
>>DA cpu: [LIx,C] Data = 063613
>>DA buf: Data 277 tag ATN | EDT unloaded from FIFO (0)
>>DA buf: FIFO cleared
>>DA xfer: Data 100677 tag ATN | EDT loaded into FIFO (1)
>>DA xfer: HP-IB DIO 277 signals ATN available
>>DA xfer: HP-IB address 0 accepted unlisten
>>DA xfer: HP-IB address 1 accepted secondary 08H
>>DA serv: Unit 1 state read transfer delay 3 service scheduled
>>DA serv: Unit 1 state command execution delay 100 service scheduled
>>DA iobus: Received data 000000 with signals CLC | CLF
>>DA iobus: Returned data 000000
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