********************************************************************
* 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   SET   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)

   ENDC