Contact us Heritage collections Image license terms
HOME ACL ACD C&A Literature Technology
Further reading: □ Overview □ Control Panel □ Operator Intervention
INF CCD CISD Harwell Archives Contact us Heritage archives Image license terms

Search

   
⟶ C&A ⟶ Technology ⟶ 195_Operating
⟶ C&A ⟶ Technology ⟶ 195_Operating
ACL ACD C&A INF CCD CISD Archives
Further reading ⇓

□ Overview
□ Control Panel
□ Operator Intervention

Operator Intervention

Panels L, M, N

Panels L, M, N
Full image ⇗
© UKRI Science and Technology Facilities Council

The 360/195 operator used the main 360/195 console for several less frequent tasks which were labelled operator intervention. An example is examining and modifying memory or registers and setting breakpoints. Frequently the operator intervention is required when some malfunction occurs and the customer engineer or the systems programmer requests the operator to note down certain information or perform specific tasks.

These tasks make use of the three parts of the console labelled L, M and N.

Most of the controls, or positions of controls, on these panels are for the use of the IBM customer engineer and just a few controls are used by the 360/195 operator.

Panel L

Name Type Panel
Buttons (Panel L)
START Button L
STOP Button L
Force Machine Check Interrupt (FORCE MACH CHK) Button L
Key/Switch
BLOCK SCAN Key switch L
RATE Rotary switch L (bottom right)
ADDRESS COMPARE Rotary switch L (top right, only PROCESS and either INSN and SCU STOR on the SOFT STOP side are used by operators)
SYSTEM CONSOLE TEST PROCESS CNSC OSC RESET SINGLE STEP SINGLE STEP HOLD MPLE STEP STORAGE RECONFIGURATION BSM INHIBIT NORMAL LO BSM HI BSM LOWER BANK UPPER BANK LO BSM HI BSM 7 8 9 A B C D E F 0 1 2 3 4 5 6 CYCLIC PROGRAM COUNTER ENTRY 7 8 9 A B C D E F 0 1 2 3 4 5 6 7 8 9 A B C D E F 0 1 2 3 4 5 6 STORAGE TEST PROCESS STOP ON NO CMPR STOP ON PTY CHK/ NO CMPR STOP ON PTY CHK STOP ON COMPARE ADDRESS COMPARE PROCESS INSN SCU STORE CHAN S/F CHAN S/F SCU STORE SOFT STOP CPC HARD STOP INSN SCU STORE CHAN S/F INSN CPC LOOP RATE PROCESS SINGLE CYCLE SINGLE PULSE LOWER BANK UPPER BANK INSN STEP MPLE STEP BLOCK DO RESET REVERSE CBR PTYS ENTER INSTRUCTION CBR STOR BLOCK SCAN REPEAT RPT& RESET RPT STORAGE RCNFGN OVRD INHIBIT OVERLAP DIAGNOSE EQUIVALENT MCW ACTIVE CHAN SIM CPU DISABLE INTERVAL TIMER DECIMAL ALTN SIGN SEG 1 INHIBIT REPLACE SCU BUFFER SEGMENTS SEG 2 SEG 3 SEG 4 ADDRESS INCREMENT 1-UP S/D BEAT BSM 16 WAY ADR BSM 8 WAY STORAGE TEST STO FETCH BLOCK MPX CHAN MODE BLOK MODE SEL SYSTEM CONSOLE TEST HARD STOP FORCE MACH CHK LAMP TEST CBR-CXR CBR TO ONES START STORAGE TEST START STOP 25 30 35 40 45 50 55 60 65
START
Pressing the START button after a normal halt will restart instruction processing. The RATE rotary switch is normally set to PROCESS but if set to INS STEP the processing continues for a single step allowing multiple hits of the START button to perform instructions one at a time. If set to MPL STEP then instructions are processed every 100 milliseconds while the START button is pressed.
STOP
The CPU stops after completing any instructions that have been started executing
FORCE MACH CHK
This generates a hard stop
ADDRESS COMPARE
The PROCESS setting is the normal execution mode. If the operator sets up an address using Panel M then moving the rotary switch to INSN on the SOFT STOP side will cause the 360/195 to stop and the operator can note any settings required. If rotary switch is set to SCU STOR, then the 360/195 stops when an instruction changes the contents of that address by a store or I/O operation.
BLOCK SCAN
If the 360/195 stops, moving the BLOCK SCAN key (third from left) from its normal central position to the DOWN position followed by pressing the SCAN button on Panel N will allow any information on the system as it stopped to be reviewed.

Panel M

Name Type Panel
Specify Address or Data
Address 27 Key switches (bottom row) M
Data (0-63 plus eight parity) Key switches M (top two rows)
Buttons (Bottom Left Panel M)
DISPLAY Button M
SET CAR Button M
STORE Button M
0 1 2 3 4 5 6 7 8 9 A B C D E F 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111 0 1 0-7 P 0 1 2 3 4 5 6 7 8-15 P 8 9 10 11 12 13 14 15 CBR 0-31 16-23 P 16 17 18 19 20 21 22 23 24-31 P 24 25 26 27 28 29 30 31 0 1 32-39 P 32 33 34 35 36 37 38 39 40-47 P 40 41 42 43 44 45 46 47 48-55 P 48 49 50 51 52 53 54 55 56-63 P 56 57 58 50 60 61 62 63 8-15 P 8 9 10 11 12 13 14 15 BFR SEL BUFFER ADDRESS 16-23 P 16 17 18 19 20 21 22 23 24-31 P 24 25 26 LOG 27 WD 28 DPLY 29 30 31 CBR TO ZEROS DISPLAY STORE SET CAR 70 75 80 85 90 95 100 105 110
Address
The 27 keys in the bottom row define an address (24 bits plus 3 parity bits marked 8-15, 16-23, 24-31) can be set up to define an address of a storage location or register. The central position represents 0 and the down position represents 1. The parity settings are done automatically. The lights above indicate the settings.
Data
The top two rows define a 64-bit word plus 8 parity bits and are similar in operation to the address keys.
DISPLAY
Causes the current data setting to be placed in the control buffer register (CBR)
SET CAR
Causes the contents of the current address setting to be placed in the content address register (CAR). The STORE/DISPLAY/STG SELECT (Panel N) indicates from which area the address refers. Main store is the usual setting but buffer store and data directory are also possible.
STORE
Causes the data in the CBR to be placed in the address defined by CAR

Panel N

Name Type Panel
Alter/Display Registers or Storage
CRT DISPLAY & TAPE OP Rotary switch N (bottom left)
STORE/DISPLAY/ST(ORA)G(E) SELECT Rotary switch N (top left)
Buttons (Panel N)
SCAN Button N
SET IC Button N
SYSTEM RESET Button N
SET PSW Button N
PSW RESTART Button N
STORE/DISPLAY/ STG SELECT MAIN STORAGE STORAGE SEL SCU BFR SCU DD GEN REGS FLP REGS LOG WD DISPLAY MACH CHECK STOP PROCESS HARD STOP DISABLE CRT DISPLAY & TAPE OP PROCESS READ SKIP ENBL DIAG MESSAGE TAPE OP SCAN FLP REGS STORAGE PROC 0-6 CHANNEL INDICATION 13 115 120 125 130 SCAN SET IC COMPUTER RESET CHECK RESET SYSTEM RESET SET PSW START TAPE PSW RESTART T U V W X Y Z
CRT DISPLAY & TAPE OP
Connects the operator console to either an I/O Channel or the system control panel
STORE/DISPLAY/STG SELECT
Indicates from which area the address defined in Panel M refers. Main store is the usual setting but buffer store and data directory are also possible.
SCAN
Produces a display on the operator console
SET IC
Enters Instruction Counter data (bits 40-63 of the CBR - console buffer register) into the Program Status Word (PSW) bits 40-63.
SYSTEM RESET
Sets system back to its initial position
SET PSW
Enters bits 0-15 and 32-63 of the CBR into those positions in the PSW
PSW RESTART
Loads a new PSW from location 0 and starts processing from the program location in the new PSW
⇑ Top of page
© Chilton Computing and UKRI Science and Technology Facilities Council webmaster@chilton-computing.org.uk
Our thanks to UKRI Science and Technology Facilities Council for hosting this site