RCA 301 Programmer's Reference Manual page 39

The nominal time ratios that each input/output instruction must access memory are given in the following table:
Device
Card Reader, Model 323
Card Reader, Model 324
Card Reader, Model 329
Card Reader-Punch, Model 330 Card Reader-Punch, Model 330
Reader Unit Reader Unit
Punch Unit Punch Unit
Card Punch (100 cpm), Model 334 Card Punch (100 cpm), Model 334
Card Punch (200 cpm), Model 336 Card Punch (200 cpm), Model 336
Paper Tape Reader (1000 cps), Model 322
Paper Tape Read or Punch (100 cps), Model 321, 331
Paper Tape Punch (300 cps), Model 332
Printer—Unbuffered: Printer—Unbuffered: Printer—Unbuffered: Printer—Unbuffered: Printer—Unbuffered: Printer—Unbuffered:
120 Column Synchronous Mode 120 Column Synchronous Mode 120 Column Synchronous Mode 120 Column Synchronous Mode 120 Column Synchronous Mode 120 Column Synchronous Mode
120 Column Asynchronous Mode 120 Column Asynchronous Mode 120 Column Asynchronous Mode 120 Column Asynchronous Mode 120 Column Asynchronous Mode 120 Column Asynchronous Mode
160 Column Synchronous Mode, full speed 160 Column Synchronous Mode, full speed 160 Column Synchronous Mode, full speed 160 Column Synchronous Mode, full speed 160 Column Synchronous Mode, full speed 160 Column Synchronous Mode, full speed
160 Column Asynchronous Mode, full speed 160 Column Asynchronous Mode, full speed 160 Column Asynchronous Mode, full speed 160 Column Asynchronous Mode, full speed 160 Column Asynchronous Mode, full speed 160 Column Asynchronous Mode, full speed
160 Column Synchronous Mode, reduced speed 160 Column Synchronous Mode, reduced speed 160 Column Synchronous Mode, reduced speed 160 Column Synchronous Mode, reduced speed 160 Column Synchronous Mode, reduced speed 160 Column Synchronous Mode, reduced speed
160 Column Asynchronous Mode, reduced speed 160 Column Asynchronous Mode, reduced speed 160 Column Asynchronous Mode, reduced speed 160 Column Asynchronous Mode, reduced speed 160 Column Asynchronous Mode, reduced speed 160 Column Asynchronous Mode, reduced speed
Printer—Buffered: Printer—Buffered: Printer—Buffered: Printer—Buffered: Printer—Buffered: Printer—Buffered:
120 Column Synchronous Mode 120 Column Synchronous Mode 120 Column Synchronous Mode 120 Column Synchronous Mode 120 Column Synchronous Mode 120 Column Synchronous Mode
120 Column Asynchronous Mode 120 Column Asynchronous Mode 120 Column Asynchronous Mode 120 Column Asynchronous Mode 120 Column Asynchronous Mode 120 Column Asynchronous Mode
160 Column Synchronous Mode, full speed 160 Column Synchronous Mode, full speed 160 Column Synchronous Mode, full speed 160 Column Synchronous Mode, full speed 160 Column Synchronous Mode, full speed 160 Column Synchronous Mode, full speed
160 Column Asynchronous Mode, full speed 160 Column Asynchronous Mode, full speed 160 Column Asynchronous Mode, full speed 160 Column Asynchronous Mode, full speed 160 Column Asynchronous Mode, full speed 160 Column Asynchronous Mode, full speed
160 Column Synchronous Mode, reduced speed 160 Column Synchronous Mode, reduced speed 160 Column Synchronous Mode, reduced speed 160 Column Synchronous Mode, reduced speed 160 Column Synchronous Mode, reduced speed 160 Column Synchronous Mode, reduced speed
160 Column Asynchronous Mode, reduced speed 160 Column Asynchronous Mode, reduced speed 160 Column Asynchronous Mode, reduced speed 160 Column Asynchronous Mode, reduced speed 160 Column Asynchronous Mode, reduced speed 160 Column Asynchronous Mode, reduced speed
Monitor Printer, Model 338
Data Record File, Model 361
Data Disc File, Model 363
Hi-Data Magnetic Tape—Read Write (Model 381)
Hi-Data Magnetic Tape—Read Write (Model 382)
33.3 KC Magnetic Tape-Read Write
66.7 KC Magnetic Tape-Read Write
Multiple Tape Lister, Model 340 Multiple Tape Lister, Model 340
Print One Tape Print One Tape
Print Two Tapes Print Two Tapes
In the RCA 301 System, then, the HSM is time shared; i.e., during the time that an input/output instruction is in
progress, but is not using memory, another input/output instruction and/or compute instruction can use the memory.
Instructions Must
Access Memory For
13.44 ms
1.12 ms
1.12 ms
13.44 ms
6.72 ms
6.72 ms
13.44 ms
7 /x.s
7 fji s
7 /xs
20.069 ms
27.328 ms
26.649 ms
36.288 ms
26.649 ms
36.288 ms
1.288 ms
1.288 ms
1.568 ms
1.568 ms
1.568 ms
1.568 ms
7 jtxS
7 fj.s
7 ju.s
7 fi. s
7 fj. s
7 fxS
7 ;u.s
350 /xS
686 /xs
Out of Every
100 ms
66.7 ms
40.5 ms
75 ms
240 ms
600 ms
300 ms
1 ms
10 ms
3.3 ms
60 ms
76 ms
55.8 ms
71.8 ms
83.9 ms
100 ms
60 ms
76 ms
55.8 ms
71.8 ms
83.9 ms
100 ms
100 ms
400 fj.s
62.5 /xs
100 jixS
33 /xs
30 /x s
30 fxs
30 ms
30 ms
III-9