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NSC800 SOFTWAREPROGRAMMlNG DESCRlPTlON
HARDWARE SUPPORT AND SYSTEM DESlGN
9 other sections not shown
16-bit register according to borrow according to carry according to equality according to overflow according to parity according to sign Accumulator active low address bus Addressing Mode borrow from bit byte counter clock CMOS data bus decrement enable EPROM equality of result external device falling edge Figure flags affected FlGURE functions gate H H H handshake input input/output interrupt request l/O device lFF2 lmmediate lmplied lnput lnstruction lNTA lNTR lO/M Load logic memory location HL microprocessor Mnemonic National Semiconductor non-maskable interrupt NSC800 Family opcode fetch operation output P2CMOS parity of result peripheral Prescale program counter Propagation Delay refresh Register Destination Register lndirect Register lndirect Destination Reset P/V restart result to zero RSTA Set according sign of result Source Strobed Mode timer TlMER TRl-STATE Voltage WAlT zero H