Кстати по описанию KDJ11-B биты 1-6 в SR0 выставляются только при возникновении ошибки.Сообщение от Patron
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1.4.7.1 Memory Management Register 0 (17777572) - MMR0 provides control and records memory
management unit status. The register contains abort and status flags as shown in Figure 1-15 and described
in Table 1-10.
1.4.7.2 Memory Management Register 1 (17777574) - MMR1 records any autoincrement or
autodecrement of a general purpose register, including explicit references through the PC. The increment
or decrement amount by which the register was modified is stored in 2’s complement notation. The lower
byte is used for all source operand instructions and the destination operand may be stored in either byte,
dependiig on the mode and instruction type. The register is cleared at the beginning of each instruction
fetch. The register is defined in Figure 1-16.
1.4.7.3 Memory Management Register 2 (17 777 576) - MMR2 is loaded with the program counter of
the current instruction and is frozen when any abort condition is posted in MMR0.
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