Popis
Operates in two modes depending upon position of console switch (at T.C.) labelled "Program Check Alarm on Special Mode." The NORMAL MODE is selected if the switch is off or down. Normal Mode compares contents of AC with contents of register x. If contents of AC are identical to contents of register x, proceed to next instruction; otherwise, stop the computer and give a "check register alarm." (Note: +0 is not identical to -0.) SPECIAL MODE is chosen if switch is on. Special Mode operates in same way as above if the numbers being checked agree. If there is disagreement, no check alarm will occur but the program counter (PC) will be indexed by one, causing the next instruction to be skipped.
Odkazy
Podobné instrukce:
FIXME:whirlwind.isa.halt;.
