Apple II User Manual
0181 A484 ; WRITE EDGE DETECT CONTROL (NOT USED BECAUSE KB)
0182 A484 *=$A484
0183 A484 DNPA7 .BLOCK 1 ;DISABLE PA7 INT ,NEG EDGE DET
0183 A484 DNPA7 .BLOCK 1 ;DISABLE PA7 INT ,NEG EDGE DET
0184 A485 DPPA7 .BLOCK 1 ;DIS PA7 INT ,POS EDGE DETE
0185 A486 ENPA7 .BLOCK 1 ;ENA PA7 INT ,NEG EDG DET
0185 A486 ENPA7 .BLOCK 1 ;ENA PA7 INT ,NEG EDG DET
0186 A487 EPPA7 .BLOCK 1 ;ENA PA7 INT ,POS EDG DET
0187 A488
0187 A488
0188 A488 ; READ AND CLEAR INTERRUPT
0189 A485 *=$A485
0189 A485 *=$A485
0190 A485 RINT .BLOCK 1 ;BIT 7=TIMER FLG , BIT 6=PA7 FLG
0191 A486
0191 A486
0192 A486 ; TIMER INTERRUPT
0193 A494 *=$A494
0193 A494 *=$A494
0194 A494 ;WRITE COUNT TO INTERVAL TIMER
0195 A494 ;INTERRUPT DISABLE FOR THESE ADDRS
0195 A494 ;INTERRUPT DISABLE FOR THESE ADDRS
0196 A494 DIV1 .BLOCK 1 ;DIV BY 1 (DISABLE);ADD 8 TO ENA
0197 A495 DIV8 .BLOCK 1 ;DIV BY 8 (DIS) ; ADD 8 TO ENA
0197 A495 DIV8 .BLOCK 1 ;DIV BY 8 (DIS) ; ADD 8 TO ENA
0198 A496 DIV64 .BLOCK 1 ;DIV BY 64 (DIS) ; ADD 8 TO ENA
0199 A497 DI1024 .BLOCK 1 ;DIV BY 1024 (DIS) ; ADD 8 TO ENA
0199 A497 DI1024 .BLOCK 1 ;DIV BY 1024 (DIS) ; ADD 8 TO ENA
0200 A498
0201 A498 ; *********************************************
0201 A498 ; *********************************************
0202 A498 ; * 6522 ADDRESSES (MONIT) (A800-ABFF) *
0203 A498 ; *********************************************
0203 A498 ; *********************************************
0204 A800 *=$A800
0205 A800 DRB .BLOCK 1 ;DATA REG B
0205 A800 DRB .BLOCK 1 ;DATA REG B
0206 A801 DRAH .BLOCK 1 ;DATA REG A
0207 A802 DDRB .BLOCK 1 ;DATA DIR REG B
0207 A802 DDRB .BLOCK 1 ;DATA DIR REG B
0208 A803 DDRA .BLOCK 1 ;DATA DIR REG A
0209 A804 T1L .BLOCK 1 ;TIMER 1 COUNTER LOW
0209 A804 T1L .BLOCK 1 ;TIMER 1 COUNTER LOW
0210 A805 T1CH .BLOCK 1 ;TIMER 1 COUNTER HIGH
0211 A806 T1LL .BLOCK 1 ;TIMER 1 LATCH LOW
0211 A806 T1LL .BLOCK 1 ;TIMER 1 LATCH LOW
0212 A807 T1LH .BLOCK 1 ;TIMER 1 LATCH HIGH
0213 A808 T2L .BLOCK 1 ;TIMER 2 LATCH & COUNTER LOW
0213 A808 T2L .BLOCK 1 ;TIMER 2 LATCH & COUNTER LOW
0214 A809 T2H .BLOCK 1 ;TIMER 2 COUNTER HIGH
0215 A80A SR .BLOCK 1 ;SHIFT REGISTER
0215 A80A SR .BLOCK 1 ;SHIFT REGISTER
0216 A80B ACR .BLOCK 1 ;AUX CONTROL REGISTER
0217 A80C PCR .BLOCK 1 ;PERIPHERAL CONTROL REGISTER
0217 A80C PCR .BLOCK 1 ;PERIPHERAL CONTROL REGISTER
0218 A80D IFR .BLOCK 1 ;INTERRUPT FLAG REGISTER
0219 A80E IER .BLOCK 1 ;INTERRUPT ENABLE REGISTER
0219 A80E IER .BLOCK 1 ;INTERRUPT ENABLE REGISTER
0220 A80F DRA .BLOCK 1 ;DATA REGISTER A
0221 A810
0221 A810
0222 A810 ;DEFINE I/O CONTROL FOR PCR (CA1,CA2,CB1,CB2)
0223 A810 DATIN =$0E ;DATA IN CA2=1
0223 A810 DATIN =$0E ;DATA IN CA2=1
0224 A810 DATOUT =$0C ;DATA OUT CA2=0
0225 A810 PRST =$00 ;PRINT START (CB1) ,NEG DETEC
0225 A810 PRST =$00 ;PRINT START (CB1) ,NEG DETEC
0226 A810 SP12 =$01 ;STROBE P1,P2 (CA1) ,POS DETEC
0227 A810 MON =$C0 ;MOTOR ON (CB2=0)
0227 A810 MON =$C0 ;MOTOR ON (CB2=0)
0228 A810 MOFF =$E0
0229 A810 ;MSKS TO OBTAIN EACH INTERRUPT
0229 A810 ;MSKS TO OBTAIN EACH INTERRUPT
0230 A810 MPRST =$10 ;INT FLG FOR CB1
0231 A810 MSP12 =$02 ;INT FLG FOR CA1
0231 A810 MSP12 =$02 ;INT FLG FOR CA1
0232 A810 MT2 =$20 ;INT FLG FOR T2
0233 A810
0233 A810
0234 A810 ;DEFINE I/O CONTROL FOR ACR (TIMERS,SR)
0235 A810 PRTIME =1700 ; PRINTING TIME =1.7M MSEC
0235 A810 PRTIME =1700 ; PRINTING TIME =1.7M MSEC
0236 A810 DEBTIM =5000 ; DEBOUNCE TIME (5 MSEC)
0237 A810 T2I =$00 ;T2 AS ONE SHOT (PRI,KB,TTY,TAPE)
0237 A810 T2I =$00 ;T2 AS ONE SHOT (PRI,KB,TTY,TAPE)
0238 A810 T1I =$00 ;T1 AS ONE SHOT,PB7 DIS (TAPES)
0239 A810 T1FR =$C0 ;T1 IN FREE RUNNING (TAPE)
0239 A810 T1FR =$C0 ;T1 IN FREE RUNNING (TAPE)
0240 A810
0241 A810 ; ******************************
0241 A810 ; ******************************
0242 A810 ; * DISPLAY (AC00-AFFF) *