55
The DISCONNECT option will drop the Telnet connection. The connection is also disconnected when the device is
detached.
When entering the SC option, specify the lower select code with either device name; the higher select code will be
set automatically, and the cards will be assigned in the correct order.
When a debug log has been established, tracing may be configured for each card separately by specifying one or
more of the reporting level options:
Option Reporting Level
CMDS
Command initiations and completions
CPU
Words received from and sent to the CPU
XFER
Data receptions and transmissions
IOBUS
I/O bus signals and data words received and returned
The CMDS option traces the commands executed by the processor interconnect. The CPU option traces words
received from (control and write data) and sent to (status and read data) the CPU. The XFER option traces the
words received and transmitted over the interconnecting cables. The IOBUS option traces the I/O backplane
signals and data received and returned via the interface.
Examples of the trace formats follow:
>>IPLI cmds: [STC] Control set
>>IPLI cmds: [EDT] Delaying DMA completion interrupt for 1 msec
>>IPLI cpu: [LIx] Command = 006412
>>IPLO cpu: [OTx] Command = 160004
>>IPLI xfer: [STC] Socket write = 000000, status = 2
>>IPLO xfer: Socket read = 000000, status = 2
>>IPLI iobus: Received data 000000 with signals IOO | STC | CLC | CLF | EDT
>>IPLI iobus: Returned data 000000
The Inbound Data interface supports the BOOT command to load an absolute binary program from the other
processor. The BOOT IPLI command copies the HP 2000 IOP Basic Binary Loader into memory, sets the P
register to the processor interconnect loader, and begins execution. The S register is set as follows:
1514131211109876543210
0000 IPLI select code 000000
Loader execution ends with one of the following halt instructions:
• HLT 11 — a checksum error occurred; A = calculated value, B = expected value.
• HLT 55 — the load address would overlay the ROM loader.
• HLT 77 — the end of the program was reached with a successful read.
To Next Page
Loading...
