;I/O PORTS FOR PX-8

DEF ICRL_C=0	;Read: Input Capture Register Low and Command trigger
		; reading will capture current value in free running counter
DEF CTRL1 =0	;Write: Control Register 1
     DEF BANK_SELECT=00000001b
	     DEF ROM_BANK=0
	     DEF RAM=BANK=1
     DEF BAR_CODE_MODE1=00000010b
	     DEF ON_FALLING=1
	     DEF NOT_ON_FALLING=0
     DEF BAR_CODE_MODE2=00000100b
	     DEF ON_RISING=1
	     DEF NOT_ON_RISING=0
     DEF BAR_CODE_POWER=00001000b
	     DEF OFF=0
	     DEF ON=1
     DEF BAUD_RATE_SELECT=11110000b
	     DEF BAUD_110=00000000b
	     DEF BAUD_150=00010000b
	     DEF BAUD_300=00100000b
	     DEF BAUD_600=00110000b
	     DEF BAUD_1200=01000000b
	     DEF BAUD_2400=01010000b
	     DEF BAUD_4800=01100000b
	     DEF BAUD_9600=01110000b
	     DEF BAUD_19.2K=10100000b
	     DEF BAUD_1200_75=10000000b
	     DEF BAUD_75_1200=00010000b
DEF ICRH_C=1	;Read: Input Capture Register High byte of free running counter
DEF CMDR  =1	;Write: 6301 Command Register
     DEF SET_RDYSIO=00000001b ;Signal 6301 to accept input
     DEF RESET_RDYSIO=00000010b ;Signal 6301 done
     DEF RESET_FRC_OVERFLOW=00000100b ;Reset Free Running Counter Overflow
DEF ICRL_B=2	;Read: Input Capture Register Low for Bar Code
DEF CTRL2 =2	;Write: Control Register 2
     DEF SET_LED_0=00000001b
     DEF SET_LED_1=00000010b
     DEF SET_LED_2=00000100b
     DEF RS232C_POWER=00001000b
     DEF RS232C_INHIBIT=00010000b;No output while turning off
     DEF RS232C_RX_ENABLE=00100000b;Disable for modem
DEF ICRH_B=3	;Read Capture Register High for Bar Code
DEF ISR   =4	;Read Interrupt Status Register 1=>interrupt
     DEF INT0_7508=	 00000001b
     DEF INT1_8251_RXRDY=00000010b
     DEF INT2_RS232C_CD= 00000100b
     DEF INT3_FRC_TO_ICR_B=00001000b
     DEF INT4_FRC_OVERFLOW=00010000b
     DEF INT5_EXTERNAL=    00100000b
DEF IER   =4	;Write: Interrupt Enable Register  1=>enabled
DEF STR   =5	;Read: Status Register
     DEF BANK_STATUS=00000001b; 0=>ROM	1=>RAM
     DEF BAR_CODE_DATA=00000010b; 0=>Low 1=>High
     DEF RDY_7508_IN=  00000100b
     DEF RDYSIO_7508=  00001000b; 1=>R/W to SIOR enabled
DEF SIOR  =6	;Read/Write: 8 bits from/to 7508
DEF DDR_DWR=0Ch ;Read/Write: 8 bits data from/to 8251
DEF CSR_CCR=0Dh ;Read/Write: 8 bits status/command for 8251
DEF PSR_CSR=0Eh  ;Read/write: 4 bits status on 6301 and LCD controller
     DEF OUT_BUFFER_6301=00000001b; 0=> 6301 has read PDIR
     DEF IN_BUFFER_6301 =00000010b; 1=> 6301 has written PDOR
     DEF COMMAND_FLAG1	=00000100b; 1=> command:0=> data from 6301
     DEF COMMAND_FLAG2	=00001000b; 1=> command:0=> data from 6301
DEF PDOR_PDIR=0Fh;Read/write: 8 bits data and commands to 6301
DEF DRR_DWR =80h ;Read/write: 8 bits data from and to RAM disk
DEF MSR_WCR =81h ;Read/write: command and handshake to	RAM disk
DEF DCR     =84h ;Write: tone command to Modem 
     DEF TONE_SELECTOR=00001111b
     DEF TONE_CONTROL =00010000b; 0=>off  1=>on
	     DEF TONE_1=0
	     DEF TONE_2=1
	     DEF TONE_3=2
	     DEF TONE_4=4
	     DEF TONE_5=5
	     DEF TONE_6=6
	     DEF TONE_7=8
	     DEF TONE_8=9
	     DEF TONE_9=10
	     DEF TONE_*=12
	     DEF TONE_#=14
	     DEF TONE_A=3
	     DEF TONE_B=7
	     DEF TONE_C=11
	     DEF TONE_D=15
DEF OCR=85h	;Control lines for Modem
     DEF OHC=00000001b; 0=> on hook 1=> off
     DEF HSC=00000010b; 0=> handset off 1=> on
     DEF MON=00000100b; 0=> moniter off 1=> off
     DEF TXC=00001000b; 0=> send carrier off
     DEF ANS=00010000b; 0=> originate 1=> answer
     DEF TEST=00100000b; 0=> normal  1=> analog test
     DEF PWR=01000000b; 0=> power off
     DEF CCT=10000000b; 0=> signal not connected to line
DEF MODEM_STR=86h ;Modem status
     DEF BELL_DETECT=00000001b; 0=>ringing  1=>normal
     DEF CARRIER_DETECT=00000100b;0=>Carrier 1=> not
     DEF MODEM_INSTALLED=10000000b;0=>Installed 1=>not
DEF OMR =87h ;ouput 89h to make modem and 8251 compatible
DEF MAR1=90h ;Address lines to Multi-unit
DEF MAR2=91h
DEF MAR3=92h
DEF MAP =93h ;Read/Write 8 bit data for Multi-unit
DEF MSR_MCR=94h ;Read/Write status and command to Multi-unit
     DEF RAM_PROTECT=00000001b ;0=> write enable 1=>protect
     DEF RAM_FILE=   00000010b ;0=> closed  1=> open
     DEF RAM_INSTALL=10000000b ;0=> installed 1=> not

ble 1=>protect
     DEF