mirror of
https://github.com/PDP-10/its.git
synced 2026-01-13 15:27:28 +00:00
26 lines
1.4 KiB
Plaintext
26 lines
1.4 KiB
Plaintext
SLIGHT IMPROVEMENTS TO CARPET 4/30/76 --RG
|
||
TWO NEW COMMANDS HAVE BEEN ADDED.
|
||
300:PPRI (FOR EXAMPLE) SETS THE BPT VECTOR PRIORITY TO 300.
|
||
(IT IS NORMALLY 340.) THIS COMMAND IS USEFUL IF THE 10-11
|
||
INTERFACE TO THE PARTICULAR 11 IS CONNECTED TO OTHER THAN
|
||
NPG. IF IT IS, SETTING THE PRIORITY TO 340 WOULD LOCK OUT
|
||
THE 10 COMPLETELY, CAUSING LOSSAGE. AT THE PRESENT TIME,
|
||
THE LISP MACHINE GT40 IS THE ONLY 11-END NOT CONNECTED TO BG7.
|
||
IT IS CONNECTED TO BG7, SO 300:PPRI IS THE RIGHT THING.
|
||
:BOOT CAUSES CARPET TO GRONK IN THE BOOTSTRAP. THIS IS USEFUL IF
|
||
IT HAS BEEN CLOBBERED, OR IF CARPET DID NOT LOAD THE PROGRAM
|
||
ORIGINALLY WITH A ;L . WHEN :BOOT IS TYPED, CARPET WILL PUT THE
|
||
BOOT AT WHAT IT THINKS IS (NEAR THE) TOP OF MEMORY, AND TYPE:
|
||
BOOT LOADED, HIT START AT XXXXX.
|
||
CARPET THEN HANGS WAITING FOR A TYPED CHARACTER. THUS, IT IS
|
||
"SAFE" (GIVEN 10-11 INTERFACE LOSSAGE WHEN TALKING TO STOPPED MACHINES)
|
||
TO STOP THE 11 AND FOLLOW THE INSTRUCTION.
|
||
WHEN A CHARACTER IS TYPED, IF CARPET THINKS IT HAS "MADE CONNECTION"
|
||
IT WILL TYPE AN ENTRY MESSAGE, OTHERWISE A QUESTION MARK.
|
||
|
||
ADDITIONALLY, THE ROUTINES WHICH EXAMINE AND DEPOSIT IN THE 11 HAVE BEEN
|
||
HAIRED UP SOME. THEY ATTEMPT TO CHECK ALL TRANSFERS, AND TRY AGAIN IF LOSSAGE
|
||
OCCURS, ALSO ADVISING THE USER. ALSO, SINGLE WORD DEPOSITS ARE DONE, SO
|
||
LOSSAGE THAT FORMERLY OCCURRED READING IO-REGISTERS WHICH ARE AFFECTED BY
|
||
BEING READ MAY BE AVOIDED.
|
||
|