FIXED STORAGE LOCATIONS Area, Hex EC dec. addr only Function 0- 7 0 8- 15 8 16- 23 10 24- 31 18
32- 39 20 40- 47 28
48- 55 30 56- 63 38
64- 71 40 72- 75 48 80- 83 50 88- 95 58 96-103 60 104-111 68
112-119 70 120-127 78
132-133 84
132-133 84
134-135 86 136-139 88 140-143 8C 144-147 90 148-149 94 150-151 96
152-155 98
156-159 9C 168-171 A8
172-175 AC 176-179 BO 185-187 B9 216-223 08 224-231 EO 232-239 E8
248-251 F8
252-255 FC 256-351 100 352-383 160 384-447 180 448-511 lCO 512
t 200 Initial program loading PSW, restart new PSW Initial program loading CCW1, restart old PSW Initial program loading CCW2 External old PSW Supervisor Call old PSW Program old PSW Machine-check old PSW Input/output old PSW Channel status word (see diagram) Channel address word [0-3 key, 4-7 zeros, 8-31 CCWaddress] Interval timer External new PSW Supervisor Call new PSW Program new PSW Machine-check new PSW Input/output new PSW CPU address assoc'd with external interruption, or unchanged
X CPU address assoc'd with external interruption, or zeros
X External interruption code
X SVC interruption [0-12 zeros, 13-14 I LC, 15:0, 16-31 code]
X Program interrupt. [0-12 zeros, 13-14 ILC, 15:0, 16-31 code]
X Translation exception address [0-7 zeros, 8-31 address]
Monitor class [0-7 zeros, 8-15 class number]
X PER interruption code [0-3 code, 4-15 zeros]
X PER address [0-7 zeros, 8-31 address]
Monitor code [0-7 zeros, 8-31 monitor code] ChannellD [0-3 type, 4-15 model, 16-31 max.IOELlength] 1/0 extended logout address [0-7 unused, 8-31 address}
Limited channel logout (see diagram)
X 1/0 address [0-7 zeros, 8-23 address} CPU timer save area Clock comparator save area
Machine-check interruption code (see diagram)
Failing processor storage address [0-7 zeros, 8-31 address}
Region code*
Fixed logout area*
Floating-point register save area
General register save area Control register save area CPU extended logout area (size varies)
*May vary among models; see system library manuals for specific model. tLocation may be changed by programming (bits 8-28 of CR 15 specify address). LIMITED CHANNEL LOGOUT (hex 80) Field validity flags 5 Channel 6 Main storage control 7 Main storage
8 CPU 9 Channel 10 Main storage control 11 Main storage
16
12 Control unit
16 I nterface address
17-18 Reserved (00) 19 Sequence code 20 Unit status
21 Cmd. addr. and key
22 Channel address
23 Device address
23 24 26 28 29 31
24-25 Type of termination 00 Interface disconnect 01 Stop, stack or normal 10 Selective reset
11 System reset
28(A) I/O error alert 29-31 Sequence code MACHINE-CHECK INTERRUPTION CODE (hex EO) MC conditions
o 1314 16
Validity 31 MCEL length 55156 24 Failing stg. address
25 Region code
27 Floating-pt registers
28 General registers
29 Control registers 30 CPU ext'd logout 31 Storage logical 46 CPU timer
47 Clock comparator
63 DYNAMIC ADDRESS TRANSLATION @) VIRTUAL (LOGICAL) ADDRESS FORMAT Segment Size Page Size Segment Index Page Index Byte Index 64K 4K [ J 8 -15 16 -19
64K 2K 0-7 8 -15 16 -20 1M 4K are 8 -11 12 -19
1M 2K ignored 8 -11 12 - 20 SEGMENT TABLE ENTRY I PT length I 0000* I Page table address
o 3 4 7 8 *Normally zeros; ignored on some models.
PAGE TABLE ENTRY (4K) PAGE TABLE ENTRY (2K) l Page address ffj 10 Page address
12 (I) Page-invalid bit. 13 (I) Page-invalid bit. HEXADECIMAL AND DECIMAL CONVERSION 20 -31
21 -31 20-31 21 -31 1
00
*1
1 I TiTOVA From hex: locate each hex digit in its corresponding column position and note
the decimal equivalents. Add these to obtain the decimal value. From decimal: (1) locate the largest decimal value in the table that will fit into
the decimal number to be converted, and (2) note its hex equivalent and hex column position. (3) Find the decimal remainder. Repeat the process on this and
subsequent remai nders.
6
Note: Decimal, hexadecimal, (and binary) equivalents of all numbers from O'to 255 are listed on panels 9 -12. HEXADECIMAL COLUMNS
5 4 3 2 1
HEX = DEC HEX = DEC HEX = DEC HEX = DEC HEX = DEC HEX = DEC 0 0 0 0 0 0 0 0 0 0 0 0 1 1,048,576 1 65,536 1 4,096 1 256 1 16 1 1
2 2,097,152 2 131,072 2 8,192 2 512 2 2 2
3 3,145,728 3 196,608 3 12,288 3 768 3 48 3 3
4 4,194,304 4 262,144 4 16,384 4 1,024 4 64 4 4
5 5,242,880 5 327,680 5 20,480 5 1,280 5 80 5 5
6 6,291,456 6 393,216 6 24,576 6 1,536 6 96 6 6
7 7,340,032 7 458,752 7 28,672 7 1,792 7 112 7 7
8 8,388,608 8 524,288 8 32,768 8 2,048 8 128 8 8
9 9,437,184 9 589,824 9 36,864 9 2,304 9 144 9 9
A 10,485,760 A 655,360 A 40,960 A 2,560 A 160 A 10 B 11,534,336 B 720,896 B 45,056 B 2,816 B 176 B 11 C 12,582,912 C 786,432 C 49,152 C 3,072 C 192 C 12 0 13,631,488 D 851,968 o 53,248 D
3,328 D 208 D
13
E 14,680,064 E 917,504 E 57,344 E 3,584 E 224 E 14
F 15,728,640 F 983,040 F 61,440 F 3,840 F 240 F 15 01 23 4567 0123 4567 0123 4567
BYTE BYTE BYTE POWERS OF 2 POWERS OF 16
2
n
n 2
0 = 16 0 16
n
n
256 8 24 = 161
1 0 512 9 2
8 = 162
16 1 1024 10 212=16 3 256 2 2048 11
2 16 = 164 4096 3 4096 12 2 20 = 165 65536 4
8192 13
16384 14
32768 15
65536 16
131072 17
262144 18
524288 19 1048576 20
224 = 166 1048 576 5
2
28
= 167 16777216 6
2 32 = 168
268435456 7
2
36 = 16
9
4294967296 8 2
40 = 16
10 68 719476736 9
1 099511627776 10 244 = 1611 17592186044416 11
2
48
= 16
12
281474976710656 12 2097152 21
4194 304 22 8388608 23
16777216 24
2
52
= 16
13
4 503 599 627 370 496 13
2 56 = 16
14
72 057 594 037 927 936 14 2 60 = 1615 1 152 921 504 606 846 976 15