;******************************************************************* ; Commodore-Amiga, Inc. ; cia.i -- definitions for the registers and bits in the Complex Interface ; Adapter (CIA) chip ; ; $Header: cia.i,v 27.1 85/06/24 14:42:49 neil Exp $ ; ; $Locker: $ ; ;******************************************************************* IFND HARDWARE_CIA_I@ HARDWARE_CIA_I@ = 1 ; ; _ciaa is on an ODD address (e.g. the low byte) -- $bfe001 ; _ciab is on an EVEN address (e.g. the high byte) -- $bfd000 ; ; do this to get the definitions: ; XREF _ciaa ; XREF _ciab ; ; cia register offsets ciapra EQU $0000 ciaprb EQU $0100 ciaddra EQU $0200 ciaddrb EQU $0300 ciatalo EQU $0400 ciatahi EQU $0500 ciatblo EQU $0600 ciatbhi EQU $0700 ciatodlow EQU $0800 ciatodmid EQU $0900 ciatodhi EQU $0A00 ciasdr EQU $0C00 ciaicr EQU $0D00 ciacra EQU $0E00 ciacrb EQU $0F00 ; interrupt control register bit numbers CIAICRB_TA EQU 0 CIAICRB_TB EQU 1 CIAICRB_ALRM EQU 2 CIAICRB_SP EQU 3 CIAICRB_FLG EQU 4 CIAICRB_IR EQU 7 CIAICRB_SETCLR EQU 7 ; control register A bit numbers CIACRAB_START EQU 0 CIACRAB_PBON EQU 1 CIACRAB_OUTMODE EQU 2 CIACRAB_RUNMODE EQU 3 CIACRAB_LOAD EQU 4 CIACRAB_INMODE EQU 5 CIACRAB_SPMODE EQU 6 CIACRAB_TODIN EQU 7 ; control register B bit numbers CIACRBB_START EQU 0 CIACRBB_PBON EQU 1 CIACRBB_OUTMODE EQU 2 CIACRBB_RUNMODE EQU 3 CIACRBB_LOAD EQU 4 CIACRBB_INMODE0 EQU 5 CIACRBB_INMODE1 EQU 6 CIACRBB_ALARM EQU 7 ; interrupt control register bit masks CIAICRF_TA EQU (1<<0) CIAICRF_TB EQU (1<<1) CIAICRF_ALRM EQU (1<<2) CIAICRF_SP EQU (1<<3) CIAICRF_FLG EQU (1<<4) CIAICRF_IR EQU (1<<7) CIAICRF_SETCLR EQU (1<<7) ; control register A bit masks CIACRAF_START EQU (1<<0) CIACRAF_PBON EQU (1<<1) CIACRAF_OUTMODE EQU (1<<2) CIACRAF_RUNMODE EQU (1<<3) CIACRAF_LOAD EQU (1<<4) CIACRAF_INMODE EQU (1<<5) CIACRAF_SPMODE EQU (1<<6) CIACRAF_TODIN EQU (1<<7) ; control register B bit masks CIACRBF_START EQU (1<<0) CIACRBF_PBON EQU (1<<1) CIACRBF_OUTMODE EQU (1<<2) CIACRBF_RUNMODE EQU (1<<3) CIACRBF_LOAD EQU (1<<4) CIACRBF_INMODE0 EQU (1<<5) CIACRBF_INMODE1 EQU (1<<6) CIACRBF_ALARM EQU (1<<7) ; control register B INMODE masks CIACRBF_IN_PHI2 EQU 0 CIACRBF_IN_CNT EQU (CIACRBF_INMODE0) CIACRBF_IN_TA EQU (CIACRBF_INMODE1) CIACRBF_IN_CNT_TA EQU (CIACRBF_INMODE0|CIACRBF_INMODE1) ; ; Port definitions -- what each bit in a cia peripheral register is tied to ; ; ciaa port A (0xbfe001) CIAB_GAMEPORT1 EQU (7) ; gameport 1, pin 6 (fire button*) CIAB_GAMEPORT0 EQU (6) ; gameport 0, pin 6 (fire button*) CIAB_DSKRDY EQU (5) ; disk ready* CIAB_DSKTRACK0 EQU (4) ; disk on track 00* CIAB_DSKPROT EQU (3) ; disk write protect* CIAB_DSKCHANGE EQU (2) ; disk change* CIAB_LED EQU (1) ; led light control (0==>bright) CIAB_OVERLAY EQU (0) ; memory overlay bit ; ciaa port B (0xbfe101) -- parallel port ; ciab port A (0xbfd000) -- serial and printer control CIAB_COMDTR EQU (7) ; serial Data Terminal Ready* CIAB_COMRTS EQU (6) ; serial Request to Send* CIAB_COMCD EQU (5) ; serial Carrier Detect* CIAB_COMCTS EQU (4) ; serial Clear to Send* CIAB_COMDSR EQU (3) ; serial Data Set Ready* CIAB_PRTRSEL EQU (2) ; printer SELECT CIAB_PRTRPOUT EQU (1) ; printer paper out CIAB_PRTRBUSY EQU (0) ; printer busy ; ciab port B (0xbfd100) -- disk control CIAB_DSKMOTOR EQU (7) ; disk motorr* CIAB_DSKSEL3 EQU (6) ; disk select unit 3* CIAB_DSKSEL2 EQU (5) ; disk select unit 2* CIAB_DSKSEL1 EQU (4) ; disk select unit 1* CIAB_DSKSEL0 EQU (3) ; disk select unit 0* CIAB_DSKSIDE EQU (2) ; disk side select* CIAB_DSKDIREC EQU (1) ; disk direction of seek* CIAB_DSKSTEP EQU (0) ; disk step heads* ; ciaa port A (0xbfe001) CIAF_GAMEPORT1 EQU (1<<7) CIAF_GAMEPORT0 EQU (1<<6) CIAF_DSKRDY EQU (1<<5) CIAF_DSKTRACK0 EQU (1<<4) CIAF_DSKPROT EQU (1<<3) CIAF_DSKCHANGE EQU (1<<2) CIAF_LED EQU (1<<1) CIAF_OVERLAY EQU (1<<0) ; ciaa port B (0xbfe101) -- parallel port ; ciab port A (0xbfd000) -- serial and printer control CIAF_COMDTR EQU (1<<7) CIAF_COMRTS EQU (1<<6) CIAF_COMCD EQU (1<<5) CIAF_COMCTS EQU (1<<4) CIAF_COMDSR EQU (1<<3) CIAF_PRTRSEL EQU (1<<2) CIAF_PRTRPOUT EQU (1<<1) CIAF_PRTRBUSY EQU (1<<0) ; ciab port B (0xbfd100) -- disk control CIAF_DSKMOTOR EQU (1<<7) CIAF_DSKSEL3 EQU (1<<6) CIAF_DSKSEL2 EQU (1<<5) CIAF_DSKSEL1 EQU (1<<4) CIAF_DSKSEL0 EQU (1<<3) CIAF_DSKSIDE EQU (1<<2) CIAF_DSKDIREC EQU (1<<1) CIAF_DSKSTEP EQU (1<<0) ENDIF END