_ - - - - . - - . - ... _ -- r - - - - - 64 t"- ....... , J V, U I ..... U " .. J - V V I RCTLUNIT Macro The RCTLUNIT macro instructions describing the control units for your
installation's computing system may be in any order, but they must be
contiguous and follow all of the RDEVICE macro instructions in the
module DMKRIO. The first RCTLUNIT macro instruction also generates the
label DMKRIOCU, which indicates the start of the real control unit
blocks to CP. The name field may not be specified for the RCTLONIT macro
instruction; if a name is specified it is ignored. The macro generates
a name by appending the control unit address to the characters RCO. For
example, if the control unit address is 230, the name RCU230 is
generated.
The format of the RCTLUNIT macro is:
Name Operation RCTLONIT Cperands ADDRESS= cuu ,CUTYPE=type r ALTC'R= (n. n in) ][ , FE!TUR L ____________________________________________________________________________ ADDRESS=cuu is the real address of the control unit. cuu consists of 3
hexadecimal digits. The high order digit is the channel address of
this control unit. The low order two digits must be the lowest
address of the control unit. The first digit may be any
hexadecimal number from 0 to F. If the xxx-DEVICE feature is
supported, the low order digit must be O. Otherwise, it must be
either 0 or 8. Noig: If your installation has a 2701, 2702, or 2703, and a 3704 or 3705 executing in emulation mode, you must be sure that their
addresses are not the same. CUTYPE=t ype
is the device type of the control unit. One
device type numbers can be specified: 1052, 1442,
2319, 2403, 2404, 2415, 2495, 2501, 2520, 2701, 2804, 2820, 2821, 2822, 2826, 2835, 2840, 2841,
2955, 3036, 3066, 3138, 3148, 3158, 3210, 3215,
3411, 3505, 3525, 3704, 3705, 3803, 3811, 3830, IFA, ISC, CTCA.
of the following 2150, 2250, 2314, 2702, 2703, 2803, 2844, 2845, 2848,
3272, 3274, 3345,
3851, 7443, ICA,
In addition, any other control unit that can be attached to a real System/370 may be specified in a RCTLONIT macro instruction by its
dev ice type. !otg: Specify an Integrated Printer Adapter (IPA) as a 2821.
specify a 3274 Model 1B as a 3272. Also, specify a 3880 Model 1 as
a 3830. If using IFA with 3344 or 3350 devices with more than 16
logical units, specify CUTYPE=3830 with either FEATORE=32-DEVICE or 64-DEVICE. If CUTYPE=CTCA, the low order digit of ADDRESS= must be O. The Integrated File Adapter's 9821 feature provides a range of
addresses that is too large for the RCTLONIT macro to process when
used with 3344s. The range of addresses (160-1F7) is treated as
invalid.
152 IBM VM/370 Planning and System Generation Guide
Page of GC20-1801-10 As Updated March 3, 1980 by TNL GN25-0776 RCTLUNIT Macro
Even though some devices attach directly to the channel without a
separate control unit, a RCTLUNIT macro instruction must be
included for them. For example, if you want to define a 3215, you
must code an RDEVICE and RCTLUNIT macro for the 3215; even though
the 3215 does not require a control unit, it requires a RCTLUNIT macro. If several different devices have addresses that are within
the same control unit address, only one RCTLUNIT can be
specified. Which control unit you specify is not relevant. ALTCH= (n, n,n)
specifies the alternate channel(s) to be used with the control unit
address if the primary channel path is unavailable or offline. n
represents the one-digit channel addresses for the alternate
channel paths. Up to three alternate channels can be specified.
There can be nc splitting of control units when using alternate
channels. All devices on one physical control unit must be defined
as having alternate channel(s) or no alternate channel(s). FEATURE=xxx-DEVICE is the optional control unit feature. The feature, xxx-DEVICE, indicates that the control unit is controlling more than eight
devices. The prefix, xxx, can be 16,32,48,64,80,96,112,. 128,
144, 160, 176, 192, 208, 224, 240, or 256. "Appendix B: Configuration Aid" lists the maximum number of devices that may be
specified for each control unit. This feature may be specified for
a 2403, 2702, 2703, 2803, 2835, 3272, 3345, 3704, 3705, 3803, 3830, ICA, IFA, or ISC. For any unsupported control unit, FEATURE=16-DEVICE is valid and is
the maximum you can specify. Unsupported control units are any
tha t do not a ppear in the "Configurations" section of Part 1. The starter system does not provide support for device
configurations over 16 when you are defining the devices needed to
do the system generation. Therefore, if your installation includes
control units that share more than 16 devices and are also
switchable to another processor, the channel interface enable
switch from the other processor should be in the disable position
while you perform the system generation.
The following examples illustrate the use
instruction to describe the control units
printer-keyboard with address 01F, a 2314, and
through 04B. RCTLUNIT ADDRESS=018,CUTYPE=3215 RCTLUNIT ADDRESS=230,CUTYPE=2314 of the RCTLUNIT macro
for: a 3215 console
a 3705 with lines 040 RCTLUNIT ADDRESS=040,CUTYPE=3705,FEATURE=16-DEVICE Part 2. Defininq Your VM/370 System 153
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