IBM System/370

Table 40.10.2. 7074 I/O devices and features not supported by the
7074 Emulator program for the Model 165
1901 Data Channel and I/O devices it controls
1900 Inquiry Station
1631 File Control and 1301/2302 Disk storage
1500 Card Reader
1550 Card Punch
1400 Printer
1603 Input/Output Synchronizer
Tape read all alpha (TRA) instruction
Read binary tape instruction
Tape read or write from 1014 locations 9990-9999
129 Tape switching feature
Unit record priority interrupts
Unit record signal
Additional storage above 10K words (and associated instructions)
Interval timer
customer engineer diagnostic instructions
Optional features other than floating-point arithmetic
os job control and 1014 emulator control statements must be present
for each emulated 1014 object program. Existing 1014 programs and
their control statements need not be modified unless they use facilities
not supported by the Model 165 1014 Emulator program.
The 1014 object programs to be emulated can be placed in the input
stream, on tape, or in a sequential data set on disk (including a
partitioned data set). A DD statement in the input stream describes
their location. The required 1014 emulator control statements can
be provided via the operator console or in a card, tape. or disk
sequential data set identified by a specially named DD statement
(SYSEMCTL). They can also be placed in the input stream or in a
partitioned data set (as a member).
The 1014 Emulator program operator commands provided can be entered
via the operator's console or the input stream (located in the emulator
control statement data set). These commands provide simulation of
1014 commands on the System/310 operator's console. In addition, they
allow the operator to request a listing of an entire emulator program
area or of emulated 1014 main storage within an emulator partition
or region only.
If multiple console support (MCS) is included in the os control
program generated, emulator program messages can be routed to a specific
console device so that emulation messages are isolated.
Assuming that the 1014 (or 1010) programs to be emulated do not
use facilities or I/O devices unsupported by the Model 165 1014 Emulator
program, the following is required:
62
• OS job control and any necessary Model 165 1074 emulator control
statements must be supplied for each 1014 object program. Changes
to existing object programs and 1014 control statements are not
required. (This is true for 1074 programs being executed on a
1074 system or emulated on a Model 65.)
• Tape volumes containing files with records longer than 32,155 bytes
must be preprocessed by the tape formatting program. Tape written
in either seven- or nine-track 1014 mode can be used without
modification. (Consideration should be given to reblocking files
with short blocks in order to improve execution time and reblocking
files with long blocks to reduce-processor storage buffer
requirements.)