HP OpenVMS Systems Documentation

HP OpenVMS System Management Utilities Reference Manual

This is intended to assist managers of systems that host large numbers of users whose working sets are not large. Systems whose user bases consist of a small number of users (or processes) that require large amounts of physical memory (for example, simulations) might need to set MIN_WSMAX to a value that satisfies the requirements of those processes.

WS_OPA0

XQPCTL2

This special parameter is used by HP and is subject to change. Do not change this parameter unless HP recommends that you do so.

XQPCTLD1

This special parameter is used by HP and is subject to change. Do not change this parameter unless HP recommends that you do so.

ZERO_LIST_HI (A,D)

Devices supplied by HP are attached to the UNIBUS or Q-bus adapters according to the following basic rules:

• A device of type A is always at a fixed and predefined control and status register (CSR) address; the device always interrupts at a fixed and predefined vector address; only one example of device A can be configured in each system.
• A device of type B is identical to type A except that 1 through n examples can be configured in a single system. Examples 2 through n are also located at fixed and predefined CSRs and vector addresses.
• Devices of type C (1 through n of them) are always at fixed and predefined CSR addresses; however, the interrupt vector addresses vary according to what other devices are present on the system.
• Devices of type D (1 through n of them) are at CSR addresses and vector addresses that vary according to what other devices are present on the system.

CSR and vector addresses that vary are called floating addresses. The devices must be located in floating CSR and vector space according to the order in which the devices appear in the SYSGEN device table (see Table K-1). The SYSGEN device table lists all the type A and type B devices supported by the operating system. It also lists the type C and type D devices that are recognized by SYSGEN's autoconfiguration procedure.

The base of floating vector space is 300₈. The base of floating CSR space is 760010₈.

K.1 SYSGEN Device Table (VAX Only)

Table K-1 lists the characteristics of all HP devices. This table indicates the following information for each device type:

• Device name
• Device controller name
• Interrupt vector
• Number of interrupt vectors per controller
• Vector alignment factor
• Address of the first device register for each controller recognized by SYSGEN (the first register is usually, but not always, the CSR)
• Number of registers per controller
• Device driver name
• Indication of whether the driver is supported

Devices not listed in Table K-1 are the following ones:

• Devices not supplied by HP with fixed CSR and vector addresses. These devices have no effect on autoconfiguration. Customer-built devices should be assigned CSR and vector addresses beyond the floating address space reserved for HP-supplied devices.
• HP-supplied floating-vector devices that the AUTOCONFIGURE command does not recognize. Use the CONNECT command to attach these devices to the system.