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Updated: 11 December 1998

OpenVMS System Services Reference Manual

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Because this number is a longword, the buffer length field in the item descriptor should specify 4 (bytes).

SYI$_ARCH_NAME

When you specify SYI$_ARCH_NAME, $GETSYI returns, as a character string, the name of the CPU architecture on which the process is executing. Currently, either of two strings is returned: "Alpha" for Alpha or "VAX" for VAX.

Because this name can include up to 15 characters, the buffer length field in the item descriptor should specify 15 (bytes).

SYI$_ARCH_TYPE

When you specify SYI$_ARCH_TYPE, $GETSYI returns the type of CPU architecture on which the process is executing. SYI$_ARCH_TYPE returns 1 on VAX or 2 on Alpha.

Because this number is a longword, the buffer length field in the item descriptor should specify 4 (bytes).

SYI$_AVAILCPU_CNT

When you specify SYI$_AVAILCPU_CNT, $GETSYI returns the number of CPUs available in the current boot of the symmetric multiprocessing (SMP) system.

Because this number is a longword, the buffer length field in the item descriptor should specify 4 (bytes).

SYI$_AVAIL_CPU_MASK

On Alpha systems, when you specify SYI$_AVAIL_CPU_MASK, $GETSYI returns a mask of the present and available CPUs participating in the current boot of the symmetric multiprocessing (SMP) system.

SYI$_BOOTTIME

When you specify SYI$_BOOTTIME, $GETSYI returns the time when the node was booted.

Because the returned time is in the standard 64-bit absolute time format, the buffer length field in the item descriptor should specify 8 (bytes).

SYI$_CHARACTER_EMULATED

When you specify SYI$_CHARACTER_EMULATED, $GETSYI returns the number 1 if the character string instructions are emulated on the CPU and the value 0 if they are not.

Because this number is a Boolean value (1 or 0), the buffer length field in the item descriptor should specify 1 (byte).

SYI$_CLUSTER_EVOTES

When you specify SYI$_CLUSTER_EVOTES, $GETSYI returns the number of votes expected to be found in the OpenVMS Cluster system. The cluster determines this value by selecting the highest number from all of the following: each node's system parameter EXPECTED_VOTES, the sum of the votes currently in the cluster, and the previous value for the number of expected votes.

Because this number is a word in length, the buffer length field in the item descriptor should specify 2 (bytes).

SYI$_CLUSTER_FSYSID

When you specify SYI$_CLUSTER_FSYSID, $GETSYI returns the system identification of the founding node, which is the first node in the OpenVMS Cluster system to boot.

The cluster management software assigns this system identification to the node. You can obtain this information by using the DCL command SHOW CLUSTER. Because the system identification is a 6-byte hexadecimal number, the buffer length field in the item descriptor should specify 6 (bytes).

SYI$_CLUSTER_FTIME

When you specify SYI$_CLUSTER_FTIME, $GETSYI returns the time when the founding node is booted. The founding node is the first node in the OpenVMS Cluster system to boot.

Because the returned time is in the standard 64-bit absolute time format, the buffer length field in the item descriptor should specify 8 (bytes).

SYI$_CLUSTER_MEMBER

When you specify SYI$_CLUSTER_MEMBER, $GETSYI returns the membership status of the node in the OpenVMS Cluster system. The membership status specifies whether the node is currently a member of the cluster.

Because the membership status of a node is described in a 1-byte bit field, the buffer length field in the item descriptor should specify 1 (byte). If bit 0 in the bit field is set, the node is a member of the cluster; if it is clear, then it is not a member of the cluster.

SYI$_CLUSTER_NODES

When you specify SYI$_CLUSTER_NODES, $GETSYI returns the number (in decimal) of nodes currently in the OpenVMS Cluster system.

Because this number is a word in length, the buffer length field in the item descriptor should specify 2 (bytes).

SYI$_CLUSTER_QUORUM

When you specify SYI$_CLUSTER_QUORUM, $GETSYI returns the number (in decimal) that is the total of the quorum values held by all nodes in the OpenVMS Cluster system. Each node's quorum value is derived from its system parameter EXPECTED_VOTES.

Because this number is a word in length, the buffer length field in the item descriptor should specify 2 (bytes).

SYI$_CLUSTER_VOTES

When you specify SYI$_CLUSTER_VOTES, $GETSYI returns the total number of votes held by all nodes in the OpenVMS Cluster system. The number of votes held by any one node is determined by that node's system parameter VOTES.

Because this decimal number is a word in length, the buffer length field in the item descriptor should specify 2 (bytes).

SYI$_CONTIG_GBLPAGES

When you specify SYI$_CONTIG_GBLPAGES, $GETSYI returns the maximum number of free, contiguous global CPU-specific pages. This number is the largest size global section that can be created.

Because this number is a longword, the buffer length in the item descriptor should specify 4 (bytes).

SYI$_CPU

On VAX systems, when you specify SYI$_CPU, $GETSYI returns the CPU processor type, as represented in the processor's system identification (SID) register.

For example, the integer 1 represents a VAX--11/780 system and the integer 6 represents a VAX 8530, VAX 8550, VAX 8700, or VAX 8800 system.

Because the processor type is a longword decimal number, the buffer length field in the item descriptor should specify 4 (bytes).

The $PRDEF macro defines the following symbols for the processor types.
Processor Symbol
VAX-11/730 PR$_SID_TYP730
VAX-11/750 PR$_SID_TYP750
VAX-11/780, 785 PR$_SID_TYP780
VAXstation II, II/GPX, and MicroVAX II PR$_SID_TYPUV2
VAXstation 2000/MicroVAX 2000 PR$_SID_TYP410
VAX 8200, 8250, 8300, 8350 PR$_SID_TYP8SS
VAX 8530, 8550, 8810 (8700), and 8820-N (8800) PR$_SID_TYP8NN
VAX 8600, 8650 PR$_SID_TYP790
VAX 8820, 8830, 8840 PR$_SID_TYP8PS
VAXft 3000 Model 310 PR$_SID_TYP520
VAXstation, MicroVAX 3100 series PR$_SID_TYP420
MicroVAX 3300, 3400, 3500, 3600, 3800, 3900 PR$_SID_TYP650
VAXstation 3520, 3540 PR$_SID_TYP60
VAX 4000-300 PR$_SID_TYP670
VAX 6000-200, 6000-300 series PR$_SID_TYP9CC
VAX 6000-400 series PR$_SID_TYP9RR
VAX 9000-200, 9000-400 series PR$_SID_TYP9AQ

On Alpha systems, when you specify SYI$_CPU, $GETSYI returns PR$_SID_TYP_NOTAVAX.

For information about extended processor type codes, see the description for the SYI$_XCPU item code.

SYI$_CPUCAP_MASK

On Alpha systems, when you specify SYI$_CPUCAP_MASK, $GETSYI returns an array of quadword user capability masks for all CPUs in the system. This array is indexed by CPU ID and contains as many elements as the amount of space specified by the buffer length field in the item descriptor.

To minimize wasted space, a prior call to $GETSYI with SYI$_MAX_CPUS will provide the number of CPUs that need to be retrieved. Multiplying that value by 8 bytes for each quadword provides the value to be written in the buffer length field of the item descriptor.

SYI$_CPUTYPE

On Alpha systems, when you specify SYI$_CPUTYPE, $GETSYI returns the processor type, as stored in the hardware restart parameter block (HWRPB).

For example, the value of 2 represents a DECchip 21064 processor. Because this number is a longword, the buffer length field in the item descriptor should specify 4 (bytes).

The following table shows the processor codes and processors:
Processor Code Processor
2 21064
4 21066
5 21164
6 21064A
7 21164A
8 21264

SYI$_CWLOGICALS

When you specify SYI$_CWLOGICALS, $GETSYI returns the number 1 if the clusterwide logical name database has been initialized on the CPU, or the value 0 if it has not been initialized. Because this number is a Boolean value (1 or 0), the buffer length field in the item descriptor should specify 1 (byte).

SYI$_DAY_OVERRIDE

When you specify SYI$_DAY_OVERRIDE, $GETSYI returns the number 1 if the SET DAY command has been used to override the default primary and secondary day types in the user authorization file that are used to control user logins. $GETSYI returns the number 0 if no override is currently in effect, and the contents of user authorization file records for each user are being honored.

SYI$_DAY_SECONDARY

When you specify SYI$_DAY_SECONDARY, $GETSYI returns the number 1 if any override with the SET DAY command has been used to specify that the current day is to be considered a Secondary day for user login purposes. $GETSYI returns the number 0 if any override with the SET DAY command has been used to specify that the current day is to be considered a Primary day for user login purposes.

If $GETSYI returns the number 0 for SYI$_DAY_OVERRIDE, the number returned for SYI$_DAY_SECONDARY is meaningless. 


                         +------------------------+-------------------------+ 
                         |                SYI$_DAY_OVERRIDE                 | 
                         +------------------------+-------------------------+ 
                         |         False          |           True          | 
+------------------+-----+------------------------+-------------------------+ 
|                  |False|  Use values from UAF.  | Today is a Primary day. | 
|SYS$_DAY_SECONDARY+-----+------------------------+-------------------------+ 
|                  |True |  Use values from UAF.  |Today is a Secondary day.| 
+------------------+-----+------------------------+-------------------------+

SYI$_DECIMAL_EMULATED

When you specify SYI$_DECIMAL_EMULATED, $GETSYI returns the number 1 if the decimal string instructions are emulated on the CPU and the value 0 if they are not.

Because this number is a Boolean value (1 or 0), the buffer length field in the item descriptor should specify 1 (byte).

SYI$_DECNET_FULLNAME

When you specify SYI$_DECNET_FULLNAME, $GETSYI returns, as a character string, the DECnet for OpenVMS full name of the node.

Because the DECnet for OpenVMS full name of a node can contain up to 255 characters, the buffer length field in the item descriptor should specify 255 (bytes).

SYI$_D_FLOAT_EMULATED

When you specify SYI$_D_FLOAT_EMULATED, $GETSYI returns the number 1 if the D_floating instructions are emulated on the CPU and 0 if they are not.

Because this number is a Boolean value (1 or 0), the buffer length field in the item descriptor should specify 1 (byte).

SYI$_DEF_PRIO_MAX

On Alpha systems, when you specify SYI$_DEF_PRIO_MAX, $GETSYI returns the maximum priority for the default scheduling policy.

Because this number is a longword, the buffer length field in the item descriptor should specify 4 (bytes).

SYI$_DEF_PRIO_MIN

On Alpha systems, when you specify SYI$_DEF_PRIO_MIN, $GETSYI returns the minimum priority for the default scheduling policy.

Because this number is a longword, the buffer length field in the item descriptor should specify 4 (bytes).

SYI$_ERLBUFFERPAGES

When you specify SYI$_ERLBUFFERPAGES, $GETSYI returns the number of pages (on VAX systems) or pagelets (on Alpha systems) in an error log buffer.

Because this number is a longword, the buffer length field in the item descriptor should specify 4 (bytes).

SYI$_ERRORLOGBUFFERS

When you specify SYI$_ERRORLOGBUFFERS, $GETSYI returns the number of system pages (on VAX systems) or pagelets (on Alpha systems) in use as buffers for the error logger.

Because this number is a word in length, the buffer length field in the item descriptor should specify 2 (bytes).

SYI$_F_FLOAT_EMULATED

When you specify SYI$_F_FLOAT_EMULATED, $GETSYI returns the number 1 if the F_floating instructions are emulated on the CPU and 0 if they are not.

Because this number is a Boolean value (1 or 0), the buffer length field in the item descriptor should specify 1 (byte).

SYI$_FREE_GBLPAGES

When you specify SYI$_FREE_GBLPAGES, $GETSYI returns the current number of free global pages. The system parameter GBLPAGES sets the number of global pages that can exist systemwide.

Because the current number is a longword, the buffer length in the item descriptor should specify 4 (bytes).

SYI$_FREE_GBLSECTS

When you specify SYI$_FREE_GBLSECTS, $GETSYI returns the current number of free global section table entries. The system parameter GBLSECTIONS sets the maximum number of global sections that can exist systemwide.

Because the current number is a longword, the buffer length in the item descriptor should specify 4 (bytes).

SYI$_G_FLOAT_EMULATED

When you specify SYI$_G_FLOAT_EMULATED, $GETSYI returns the number 1 if the G_floating instructions are emulated on the CPU and the value 0 if they are not.

Because this number is a Boolean value (1 or 0), the buffer length field in the item descriptor should specify 1 (byte).

SYI$_GH_RSRVPGCNT

On Alpha systems, when you specify SYI$_GH_RSRVPGCNT, $GETSYI returns the number of pages covered by granularity hints to reserve for use by the Install utility after system startup has completed.

Because this number is a longword, the buffer length field in the item descriptor should specify 4 (bytes).

SYI$_H_FLOAT_EMULATED

When you specify SYI$_H_FLOAT_EMULATED, $GETSYI returns the number 1 if the H_floating instructions are emulated on the CPU and the value 0 if they are not.

Because this number is a Boolean value (1 or 0), the buffer length field in the item descriptor should specify 1 (byte).

SYI$_HW_MODEL

When you specify SYI$_HW_MODEL, $GETSYI returns a small integer that can be used to identify the model type of the node.

An integer greater than 1023 indicates an Alpha node.

An integer less than or equal to 1023 indicates a VAX node.

The $ALPHADEF and $VAXDEF macros in SYS$LIBRARY:STARLET define the model type integers. See the tables under the SYI$_HW_NAME item code for the VAX processor names and the corresponding model types.

Because SYI$_HW_MODEL is a word, the buffer length field in the item descriptor should specify 2 (bytes).

SYI$_HW_NAME

When you specify SYI$_HW_NAME, $GETSYI returns the model name string of the node. The model name is a character string that describes the model of the node (such as VAX 8800, MicroVAX II). The model name usually corresponds to the nameplate that appears on the outside of the CPU cabinet.

Because SYI$_HW_NAME can include up to 31 characters, the buffer length field in the item descriptor should specify 31 (bytes).

The following table lists the Alpha model processor names and the corresponding model types.
Alpha Model Processor Name Alpha Model Type
DEC 3000 400 ALPHA$K_A3000_400W
DEC 3000 400S ALPHA$K_A3000_400S
DEC 3000 500 ALPHA$K_A3000_500W
DEC 3000 500S ALPHA$K_A3000_500S
DEC 4000 610 ALPHA$K_A4000_610
DEC 4000 620 ALPHA$K_A4000_620
DEC 4000 630 ALPHA$K_A4000_630
DEC 4000 640 ALPHA$K_A4000_640
DEC 7000 Model 610 ALPHA$K_A7000_610
DEC 7000 Model 620 ALPHA$K_A7000_620
DEC 7000 Model 630 ALPHA$K_A7000_630
DEC 7000 Model 640 ALPHA$K_A7000_640
DEC 10000 Model 610 ALPHA$K_A10000_610
DEC 10000 Model 620 ALPHA$K_A10000_620
DEC 10000 Model 630 ALPHA$K_A10000_630
DEC 10000 Model 640 ALPHA$K_A10000_640

The following table lists the VAX model processor names and the corresponding model types.
VAX Model Processor Name VAX Model Type
VAX-11/730 VAX$K_V730
VAX-11/750 VAX$K_V750
VAX-11/780 VAX$K_V780
VAX-11/785 VAX$K_V785
MicroVAX II VAX$K_VUV2
VAXstation II VAX$K_VWS2
VAXstation II/GPX VAX$K_VWSD
VAXstation 2000 VAX$K_VWS2000
MicroVAX 2000 VAX$K_VUV2000
VAXstation 2000/GPX VAX$K_VWSD2000
VAX 8200 VAX$K_V8200
VAX 8250 VAX$K_V8250
VAX 8300 VAX$K_V8300
VAX 8350 VAX$K_V8350
VAX 8530 VAX$K_V8500
VAX 8550 VAX$K_V8550
VAX 8600 VAX$K_V8600
VAX 8650 VAX$K_V8650
VAX 8810 (8700) VAX$K_V8700
VAX 8820-N (8800) VAX$K_V8800
VAX 8820, 8830, or 8840 with one CPU enabled VAX$K_V8810
VAX 8820 VAX$K_V8820
VAX 8830 VAX$K_V8830
VAX 8840 VAX$K_V8840
VAXft 3000 Model 310 VAX$K_V520FT
VAXstation 3520 VAX$K_V3520L
VAXstation 3540 VAX$K_V3540L
VAX 4000-300 timeshare VAX$K_V670
VAX 4000-300 server VAX$K_V670_S
VAX 6000-210 timeshare VAX$K_V6210_T
VAX 6000-220 timeshare VAX$K_V6220_T
VAX 6000-230 timeshare VAX$K_V6230_T
VAX 6000-240 timeshare VAX$K_V6240_T
VAX 6000-250 timeshare VAX$K_V6250_T
VAX 6000-260 timeshare VAX$K_V6260_T
VAX 6000-210 server VAX$K_V6210_S
VAX 6000-220 server VAX$K_V6220_S
VAX 6000-310 timeshare VAX$K_V6310_T
VAX 6000-320 timeshare VAX$K_V6320_T
VAX 6000-330 timeshare VAX$K_V6330_T
VAX 6000-340 timeshare VAX$K_V6340_T
VAX 6000-350 timeshare VAX$K_V6350_T
VAX 6000-360 timeshare VAX$K_V6360_T
VAX 6000-310 server VAX$K_V6310_S
VAX 6000-320 server VAX$K_V6320_S
VAX 6000-410 timeshare VAX$K_V9RR10_T
VAX 6000-420 timeshare VAX$K_V9RR20_T
VAX 6000-430 timeshare VAX$K_V9RR30_T
VAX 6000-440 timeshare VAX$K_V9RR40_T
VAX 6000-450 timeshare VAX$K_V9RR50_T
VAX 6000-460 timeshare VAX$K_V9RR60_T
VAX 6000-410 server VAX$K_V9RR10_S
VAX 6000-420 server VAX$K_V9RR20_S
VAX 9000-210 VAX$K_V9AR10
VAX 9000-410 VAX$K_V9AQ10
VAX 9000-420 VAX$K_V9AQ20
VAX 9000-430 VAX$K_V9AQ30
VAX 9000-440 VAX$K_V9AQ40

SYI$_ITB_ENTRIES

On Alpha systems, when you specify SYI$_ITB_ENTRIES, $GETSYI returns the number of instruction stream translation buffer entries that support granularity hints to be allocated for resident code.

Because this number is a longword, the buffer length field in the item descriptor should specify 4 (bytes).

SYI$_MAX_CPUS

On Alpha systems, when you specify SYI$_MAX_CPUS, $GETSYI returns the maximum number of CPUs that can exist in the current configuration of the symmetric multiprocessing (SMP) system.

SYI$_MAX_PFN

When you specify SYI$_MAX_PFN, $GETSYI returns the highest numbered PFN in use by the operating system. The highest numbered PFN used by OpenVMS is influenced by the PHYSICAL_MEMORY SYSGEN parameter.

Because this number is a longword, the buffer length field in the item descriptor should specify 4 (bytes).

SYI$_MEMSIZE

When you specify SYI$_MEMSIZE, $GETSYI returns the total number of pages of physical memory in the system configuration.

Because this number is a longword, the buffer length field in the item descriptor should specify 4 (bytes).

SYI$_NODE_AREA

When you specify SYI$_NODE_AREA, $GETSYI returns the DECnet area of the node.

Because the DECnet area is a longword decimal number, the buffer length field in the item descriptor should specify 4 (bytes).

SYI$_NODE_CSID

When you specify SYI$_NODE_CSID, $GETSYI returns the OpenVMS Cluster system ID (CSID) of the node. The CSID is a longword hexadecimal number assigned to the node by the cluster management software.

Because the CSID is a longword, the buffer length field in the item descriptor should specify 4 (bytes).

SYI$_NODE_EVOTES

When you specify SYI$_NODE_EVOTES, $GETSYI returns the number of votes the node expects to find in the OpenVMS Cluster system. This number is determined by the system parameter EXPECTED_VOTES.

Because the number is a word in length, the buffer length field in the item descriptor should specify 2 (bytes).

SYI$_NODE_HWVERS

When you specify SYI$_NODE_HWVERS, $GETSYI returns the hardware version of the node. The high word of the buffer length contains the CPU type. The $VAXDEF and $ALPHADEF macros define the CPU types.

Because the hardware version is a 12-byte hexadecimal number, the buffer length field in the item descriptor should specify 12 (bytes).

SYI$_NODE_NUMBER

When you specify SYI$_NODE_NUMBER, $GETSYI returns the DECnet for OpenVMS number of the node.

Because the DECnet for OpenVMS number is a longword decimal number, the buffer length field in the item descriptor should specify 4 (bytes).

SYI$_NODE_QUORUM

When you specify SYI$_NODE_QUORUM, $GETSYI returns the value (in decimal) of the quorum held by the node. This number is derived from the node's system parameter EXPECTED_VOTES.

Because this number is a word in length, the buffer length field in the item descriptor should specify 2 (bytes).

SYI$_NODE_SWINCARN

When you specify SYI$_NODE_SWINCARN, $GETSYI returns the software incarnation of the node.

Because the software incarnation of the node is an 8-byte hexadecimal number, the buffer length field in the item descriptor should specify 8 (bytes).

SYI$_NODE_SWTYPE

When you specify SYI$_NODE_SWTYPE, $GETSYI returns the software type of the node. The software type indicates whether the node is a VAX system, an Alpha system, or an HSC storage controller.

Because the software type is a 4-byte ASCII string, the buffer length field in the item descriptor should specify 4 (bytes).

SYI$_NODE_SWVERS

When you specify SYI$_NODE_SWVERS, $GETSYI returns the software version of the node.

Because the software version is a 4-byte ASCII string, the buffer length field in the item descriptor should specify 4 (bytes).

SYI$_NODE_SYSTEMID

When you specify SYI$_NODE_SYSTEMID, $GETSYI returns the system identification of the node.

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