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BRA BRANCH TO THE INSTRUCTION IDENTIFIED
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ACCUMULATOR A CONTENTS ASCll code assembly language buffer Carry status CH RDY LOW clock signal contents of Accumulator contents of I/O Control register bit control signals Data Direction register DATA MEMORY delay loop device digital logic extemal logic FFAW FFB SWITCHING Figure flip-flop FFC gate HAMMER ENABLE FF handshaking illustrated as follows Index register INPUT I/O PORT instruction is executed instruction sequence interrupt request ISOLATE BITS LDA A SC001 lndex lNPUT LOAD I/O PORT LOGlC LOP1 memory addresses memory location microcomputer system microseconds multivibrator object bytes object code one-shot output low output signals PORT B CONTENTS print cycle printhammer firing printwheel Program Counter PW READY PW STROBE Q output RESET BIT RIBBON MOTION SC001 INPUT I/O SC001 OUTPUT SCRA SE001 RESTORE RESULT SET BIT SIMULATE FLIP-FLOP Stack Pointer subroutine TEST three instructions transition triggered