================================================================================ Note 3.0 LSI-11/73 Bootstraps No replies JAWS::KAISER 114 lines 25-MAR-1985 09:14 -------------------------------------------------------------------------------- +---------------+ +-----------------+ | d i g i t a l | | uNOTE # 003 | +---------------+ +-----------------+ +----------------------------------------------------+-----------------+ | Title: Compatible Bootstraps for the LSI-11/73 | Date: 28-NOV-83 | +----------------------------------------------------+-----------------+ | Originator: Mike Collins | Page 1 of 2 | +----------------------------------------------------+-----------------+ 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.