Default VME Settings | MOTLoad Firmware |
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zVMEbus Slave Image 0 Translation Offset = 00000000
Sets VSI0_TO to define that no translation of the VMEbus address is to occur when transferred to the local PCI bus. According to the CHRP map in use by MOTLoad, this will result in transfers to local DRAM; that is, 0x00000000 on the VMEbus is 0x00000000 in local DRAM.
zVMEbus Slave Image 1 - 7
These images are set to zeroes and thus disabled.
zVMEbus Register Access Image Control Register = 00000000
The VRAI_CTL register is disabled.
zVMEbus Register Access Image Base Address Register = 00000000
The contents of the VRAI_BS register are not applicable since the image is disabled.
zPCI Miscellaneous Register = 10000000
The LMISC register is set for Universe I compatibility and the coupled window timer is disabled.
zSpecial PCI Slave Image Register = 00000000
The SLSI register is disabled.
zMaster Control Register = 00C00000
The MAST_CTL register is set to retry forever before the PCI master signals error, transfer 128 bytes on posted writes before release, use VMEbus request level 3, request mode = Demand, Release When Done, align PCI transfers on 32 bytes and use PCI bus 0.
zMiscellaneous Control Register = 52040000
Sets MISC_CTL register to utilize 256 second VMEbus timeout, round robin arbitration, 256 second arbitration timeout, do not use
zUser AM Codes = 40400000
Sets USER_AM to indicate a user AM code of 0.
The resulting map is therefore:
PCI addresses 0x91000000 - 0xB0000000: VMEbus A32/D32 space, addresses 0x01000000 - 0x2000000.
PCI addresses 0xB0000000 - 0xB1000000: VMEbus A24/D16 space, addresses 0xF0000000 - 0xF1000000.
PCI addresses 0xB3FF0000 - 0xB4000000: VMEbus A16/D16 space, addresses 0xFFFF0000 - 0xFFFFFFFF.
VMEbus A32/D32 addresses from 0x00000000 to (local DRAM size) address the local memory of the MVME5500.
The following sections provide additional information pertaining to the VME firmware settings of the MVME5500. A few VME settings are controlled by hardware jumpers while the majority of the VME settings are managed by the firmware command utility vmeCfg.
MVME55006E | 63 |