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Note 3.0 LSI-11/73 Bootstraps No replies
JAWS::KAISER 114 lines 25-MAR-1985 09:14
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| d i g i t a l | | uNOTE # 003 |
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+----------------------------------------------------+-----------------+
| Title: Compatible Bootstraps for the LSI-11/73 | Date: 28-NOV-83 |
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| Originator: Mike Collins | Page 1 of 2 |
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The LSI-11/73 (KDJ11-AA) is a high performance CPU for the Q-Bus. It is
a CPU only, which means that there is no boot capability on the module
itself. Therefore a boot module must be selected to work with the
LSI-11/73.
This uNOTE will discuss the bootstrap modules which can be used with the
11/73.
There are 4 possible modules which can be used for bootstrap.
They are : MXV11-BF w/MXV11-B2 boot ROMs
MRV11-D w/MXV11-B2 boot ROMs
MXV11-AA or -AC w/MXV11-A2 boot ROMs
BDV11
For an LSI-11/73 based system to be Field Serviceable the bootstrap code
must execute a cache memory diagnostic on power-up. The only boot code
which satisfies this requirement is found in the MXV11-B2 boot ROMs.
Therefore an LSI-11/73 based, Field Serviceable system must use either
the MXV11-BF w/MXV11-B2 ROMs or the MRV11-D w/MXV11-B2 ROMs.
NOTE
The MXV11-B2 ROMs will not work on the MXV11-A module.
MXV11-BF or MRV11-D w/MXV11-B2 ROMs
-----------------------------------
The MXV11-BF w/MXV11-B2 ROMs is the preferred choice since this module
has 2 asynchronous serial lines as well as 128Kb of dynamic RAM in
addition to the boot capability. However, if your application does not
need the extra serial lines and RAM, an alternate choice would be the
MRV11-D w/MXV11-B2 ROMs.
The MXV11-B2 ROMs will boot the following devices :
RLO1 / RLO2 (DL)
RXO1 / RXO2 (DX,DY)
TU58 (DD)
TSV05 (MS)
MSCP type Devices e.g. RD51, RX50 (DU)
DECnet via DPV11, DLV11-E, DLV11-F, DUV11
Page 2
NOTE
The MXV11-BF is not supported by RSTS due to its
non-parity memory. An alternative configuration would
be to use the MRV11-D with the MXV11-B2 boot ROMs, and a
DLV11-J or other DLV11 serial line device.
The remaining 2 boot modules do NOT have the necessary cache memory
diagnostic code to make an 11/73 based system Field Serviceable.
Below is a list of all of the KNOWN WORKING bootstraps for the 2
remaining boot modules.
MXV11-A w/MXV11-A2 ROMs
-----------------------
Working bootstraps : RLO1 / RLO2
RXO1 / RXO2
TU58 conventional boot
TU58 standalone boot
WARNING
If the MXV11-A is used in a 22 bit system the on-board
RAM must be disabled. Refer to uNOTE 106.
BDV11
-----
Working bootstraps : RLO1 / RLO2
RXO2
RK05
WARNING
Disable the processor and memory tests since an odd
address trap does occur in each of them. See NOTE
below. To disable the CPU test, set switch E15-1 to
OFF. To disable the memory test, set switch E15-2 to
OFF. (Refer to the Microcomputer and Interfaces
Handbook for complete configuration information.)
The 11/73 has an on-board Line Time Clock Register,
therefore the BDV11 BEVNT switch E21-5 should be set to
the OPEN position. This disables software control of
the BEVNT signal via the BDV11 LTC register and allows
software control of this signal via the 11/73 LTC
register.
If the BDV11 is used in a 22 bit system, it must be CS
REV E or later or ECO M8012-ML0005 must be installed.
NOTE
ODD ADDRESS TRAPS. The 11/23 ignores an odd address
reference whereas the KDJ11-A will trap to address 4.
