Delta Tau GEO BRICK LV Reference Manual
Turbo PMAC/PMAC2 Software Reference
Turbo PMAC Global I-Variables
49
On re-initialization – either on resetting with the E3 re-initialization jumper ON or on issuing the
$$$*** command, Turbo PMAC2 will auto-detect which MACRO ICs are present, and set I21 to the
base address of the MACRO IC with the second-lowest base address. Turbo PMAC2 will also do this
when commanded to set I21 to its default value (I21=*). If less than two MACRO ICs are found, I21
will be set to 0 instead.
$$$*** command, Turbo PMAC2 will auto-detect which MACRO ICs are present, and set I21 to the
base address of the MACRO IC with the second-lowest base address. Turbo PMAC2 will also do this
when commanded to set I21 to its default value (I21=*). If less than two MACRO ICs are found, I21
will be set to 0 instead.
I-variables I6850 – I6899 reference registers in MACRO IC 1, whose addresses are relative to the address
contained in I21. These addresses are established at power-up/reset. If the value of I21 is incorrect at
power-up/reset, these I-variables will not work. It is possible to set the value of I21 directly, saving the
value and resetting the card, but users are strongly encouraged just to let Turbo PMAC2 set I21 itself by
re-initialization or default setting, and to treat I21 as a status variable. If I21 is set to 0, these variables
will always return a value of 0.
contained in I21. These addresses are established at power-up/reset. If the value of I21 is incorrect at
power-up/reset, these I-variables will not work. It is possible to set the value of I21 directly, saving the
value and resetting the card, but users are strongly encouraged just to let Turbo PMAC2 set I21 itself by
re-initialization or default setting, and to treat I21 as a status variable. If I21 is set to 0, these variables
will always return a value of 0.
A Turbo PMAC2 will look to find MACRO nodes 16 – 23 in MACRO IC 1, referenced to the address
contained in I21. These addresses are established at power-up/reset. If the value of I21 is incorrect at
power-up/reset, these MACRO nodes will not be accessed.
contained in I21. These addresses are established at power-up/reset. If the value of I21 is incorrect at
power-up/reset, these MACRO nodes will not be accessed.
UMAC versions of the Turbo PMAC2 have the addressing capability for up to 16 MACRO ICs, but only
the 4 MACRO ICs referenced by I20 – I23 can have I-variable support. Master-to-master MACRO
communications can only be done on MACRO IC 1, referenced by I21, when I84=1.
the 4 MACRO ICs referenced by I20 – I23 can have I-variable support. Master-to-master MACRO
communications can only be done on MACRO IC 1, referenced by I21, when I84=1.
For a Turbo PMAC2 that is not Ultralite or UMAC, the only valid MACRO IC base address is $78400.
For a Turbo PMAC2 Ultralite, the valid base addresses are $78400, $79400, $7A400, and $7B400. For a
UMAC Turbo system, the valid base addresses can be expressed as $7xy00, where x can be 8, 9, A, or B,
and ‘y’ can be ‘4’, ‘5’, ‘6’, or ‘7’.
If the configuration of the MACRO ICs in a modular Turbo PMAC system, such as a UMAC Turbo rack,
is changed, the values of I20 – I23 will need to be changed.
For a Turbo PMAC2 Ultralite, the valid base addresses are $78400, $79400, $7A400, and $7B400. For a
UMAC Turbo system, the valid base addresses can be expressed as $7xy00, where x can be 8, 9, A, or B,
and ‘y’ can be ‘4’, ‘5’, ‘6’, or ‘7’.
If the configuration of the MACRO ICs in a modular Turbo PMAC system, such as a UMAC Turbo rack,
is changed, the values of I20 – I23 will need to be changed.
See Also:
I-Variables I20, I22, I23, I24, I4902 – I4903, I4926 – I4941, I6800 – I6999.
I-Variables I20, I22, I23, I24, I4902 – I4903, I4926 – I4941, I6800 – I6999.
I22
MACRO IC 2 Base Address
(Turbo PMAC2 only)
Range:
$0, $078400 - $07B700
Units:
Turbo PMAC Addresses
Default:
Auto-detected
I22 sets the base address of the third MACRO IC (called “MACRO IC 2”) in the Turbo PMAC2 system,
normally the one with the third-lowest base address. On re-initialization – either on resetting with the E3
re-initialization jumper ON or on issuing the $$$*** command, Turbo PMAC2 will auto-detect which
MACRO ICs are present, and set I22 to the base address of the MACRO IC with the third-lowest base
address. Turbo PMAC2 will also do this when commanded to set I22 to its default value (I22=*). If
less than three MACRO ICs are found, I22 will be set to 0 instead.
normally the one with the third-lowest base address. On re-initialization – either on resetting with the E3
re-initialization jumper ON or on issuing the $$$*** command, Turbo PMAC2 will auto-detect which
MACRO ICs are present, and set I22 to the base address of the MACRO IC with the third-lowest base
address. Turbo PMAC2 will also do this when commanded to set I22 to its default value (I22=*). If
less than three MACRO ICs are found, I22 will be set to 0 instead.
I-variables I6900 – I6949 reference registers in MACRO IC 2, whose addresses are relative to the address
contained in I22. These addresses are established at power-up/reset. If the value of I22 is incorrect at
power-up/reset, these I-variables will not work. It is possible to set the value of I22 directly, saving the
value and resetting the card, but users are strongly encouraged just to let Turbo PMAC2 set I22 itself by
re-initialization or default setting, and to treat I22 as a status variable. If I22 is set to 0, these variables
will always return a value of 0.
contained in I22. These addresses are established at power-up/reset. If the value of I22 is incorrect at
power-up/reset, these I-variables will not work. It is possible to set the value of I22 directly, saving the
value and resetting the card, but users are strongly encouraged just to let Turbo PMAC2 set I22 itself by
re-initialization or default setting, and to treat I22 as a status variable. If I22 is set to 0, these variables
will always return a value of 0.
A Turbo PMAC2 will look to find MACRO nodes 32 – 47 in MACRO IC 2, referenced to the address
contained in I22. These addresses are established at power-up/reset. If the value of I22 is incorrect at
power-up/reset, these MACRO nodes will not be accessed.
contained in I22. These addresses are established at power-up/reset. If the value of I22 is incorrect at
power-up/reset, these MACRO nodes will not be accessed.
UMAC versions of the Turbo PMAC2 have the addressing capability for up to 16 MACRO ICs, but only
the 4 MACRO ICs referenced by I20 – I23 can have I-variable support. Master-to-master MACRO
communications can only be done on MACRO IC 2, referenced by I22, when I84=2.
the 4 MACRO ICs referenced by I20 – I23 can have I-variable support. Master-to-master MACRO
communications can only be done on MACRO IC 2, referenced by I22, when I84=2.