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Parameter | Type | Values |
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ace_mode | Boolean | true or false. |
This statement enables the ACE mode if the CHARON-AXP license permits it. If this statement is omitted from the CHARON-AXP configuration file and the license permits it, "true" is the default, otherwise "false" is the default. For test purposes the ACE mechanism can be disabled with:
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The CHARON-AXP log file displays the status of the ACE option.
The ACE mode is disabled when the host system does not meet the minimum physical requirements for this operation. If the emulator appears to not run at its normal performance, check the log file for a change in the ACE mode and verify that sufficient host resources, especially memory, are available.
The ACE mode can be additionally calibrated with "set ace" directive and the following parameters:
Parameter | Type | Description | |
|---|---|---|---|
| cpu_architecture | Text String | Specifies the architecture of the virtual Alpha CPU. Can be one of the following: EV4, EV45, EV5, EV56, EV6, EV67, EV68 Example:
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cache_size | Value | "cache_size" defines the amount of memory in megabytes allocated to the ACE cache. The default value of the cache_size set to 1GB (1024 MB). Example:
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RAM
The CHARON-AXP memory subsystem is permanently loaded and has the logical name "ram".
| Parameter | Type | Description |
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| size | Numeric | Size of the emulated memory in MB. |
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| container | Text string | Specifies the name of a file in which CHARON-AXP stores an intermediate state of its Flash ROM. This state includes, for example, most of the console parameters. By default it is left unspecified.
Example:
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| system_name | Text string | Allows changing the system name, for example:
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| system_serial_number | Text string | Allows changing the system serial number, for example:
Any sequence of characters can be used as a serial number. Sequences longer than 16 symbols are truncated to 16 symbols. Serial Numbers should be according to DEC standard: 10 characters. First two characters are capital letters, remaining 8 characters are decimal digits. By default it is set to SN01234567 | ||||||||||||
| dsrdb[0], dsrdb[1] | Numeric | DSRB - Dynamic System Recognition Data Block. These parameters allow changing the emulated hardware model type. Example:
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| version | Text string | Sets Console and PAL code versions in the following way:
Example:
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it is recommended to specify the full path to this file
Virtual HP Alpha interval timer
The CHARON-AXP provides interval timer interrupts to virtual Alpha CPU(s) at frequency 100Hz (100 interrupts a second).
This is default behavior which may be changed through “clock_period” configuration parameter of virtual ISA or EISA bus, depending on emulated hardware model of virtual HP Alpha system.
Value of the parameter is interval timer period in microseconds. By default it is set to 10000. By changing it to 1000 frequency of virtual interval timer interrupts may be increased to 1000Hz (1000 interrupts per second).
| Parameter | Type | Description |
|---|---|---|
| clock_period | Numeric | Specifies period of interval timer, in microseconds. Only two values are supported:
By default it is set to 10000. |
Example for AlphaServer 400, DS, ES, GS:
set ISA clock_period=1000 |
Example for AlphaServer 800, 1000, 1000A, 1200, 2000, 2100, 4000, 4100:
set EISA clock_period=1000 |
Higher interval timer frequency creates higher load for virtual Alpha CPU which may cause degradation of overall virtual system performance.
Auto Boot
CHARON-AXP systems can be configured to boot the operating system automatically at start up.
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