================================================================================ Note 25.0 FPJ11,KDJ11-A compatibility No replies FURILO::JACKSON 85 lines 19-AUG-1985 11:35 -------------------------------------------------------------------------------- +---------------+ +-----------------+ | d i g i t a l | | uNOTE # 025 | +---------------+ +-----------------+ +----------------------------------------------------+-----------------+ | Title: FPJ11-AA Compatibility with the | Date: 28-APR-85 | | LSI-11/73 (KDJ11-A) | | +----------------------------------------------------+-----------------+ | Originator: Mike Collins | Page 1 of 2 | +----------------------------------------------------+-----------------+ Early LSI-11/73 (KDJ11-A) modules are incompatible with the FPJ11-AA floating point accelerator. This MicroNote describes how to identify those modules which are compatible and those which are not compatible with the FPJ11-AA. The following information refers to two identifying numbers. They are the module variation and the module revision. The module variation number is stamped onto the end of the plastic handles. It will be 'M8192', 'M8192-YB' or 'M8192-YC'. The module revision number can be found on side two of the module (noncomponent side) stamped into the plastic handle, or written with indelible ink. This number is updated as the board is ECO'd. The designation is a number followed by the module revision. e.g. 441 C1, indicates module revision C1. The first LSI-11/73 module is called a KDJ11-AA and is incompatible with the FPJ11-AA. The module variation for the KDJ11-AA is M8192, and the module revision number is C1. The KDJ11-AA can be upgraded to be FPJ11-AA compatible. Contact the local DEC office for more information concerning the upgrade procedure. Two new options have been created. The KDJ11-AB is a module which is fully compatible with the FPJ11-AA. The module variation for the KDJ11-AB is M8192-YB, and the module revision number is A1 or A2. The third option is called a KDJ11-AC and is used for fully compatible modules which have FPJ11-AAs installed onto the board by Digital. It has a module variation of M8192-YC and the module revision number is A1 or A2. Therefore a KDJ11-AB becomes a KDJ11-AC by simply installing an FPJ11-AA. Page 2 The following table summarizes the above information and should be used as a 'quick check' for FPJ11-AA compatibility. +----------+------------+------------+--------------------------+ | OPTION | MODULE | MODULE | FPJ11 COMPATIBLE? | | | VARIATION | REVISION | | +----------+------------+------------+--------------------------+ | KDJ11-AA | M8192 | C1 | NO (But Upgradeable) | +----------+------------+------------+--------------------------+ | KDJ11-AB | M8192-YB | A1 or A2 | YES | +----------+------------+------------+--------------------------+ | KDJ11-AC | M8192-YC | A1 or A2 | YES (FPJ11-AA Installed) | +----------+------------+------------+--------------------------+ CAUTION An FPJ11-AA installed on a KDJ11-AA may APPEAR to work but cache errors and parity errors may occur. An MXV11-BF must be REV C to be compatible with a KDJ11-A with an FPJ11-AA (KDJ11-AC). Earlier versions of the MXV11-BF are incompatible with KDJ11-ACs. KDJ11-As without FPJ11-AAs are compatible with all versions of the MXV11-BF. The MCV11-D is incompatible with KDJ11-ACs. KDJ11-As without FPJ11-AAs are compatible with all versions of the MCV11-D.