mod550

主要是8051源代码

;      Rev.  1.0    1990 April 27 (MOD550)
P0     DATA  080H  ;Port 0
SP     DATA  081H  ;Stack Pointer
DPL    DATA  082H  ;Data Pointer - Low Byte
DPH    DATA  083H  ;Data Pointer - High Byte
PCON   DATA  087H  ;Power Control
TCON   DATA  088H  ;Timer Control
TMOD   DATA  089H  ;Timer Mode
TL0    DATA  08AH  ;Timer 0 - Low Byte
TL1    DATA  08BH  ;Timer 1 - Low Byte
TH0    DATA  08CH  ;Timer 0 - High Byte
TH1    DATA  08DH  ;Timer 1 - High Byte
P1     DATA  090H  ;Port 1
SCON   DATA  098H  ;Serial Port Control
SBUF   DATA  099H  ;Serial Port Buffer
P2     DATA  0A0H  ;Port 2
IE     DATA  0A8H  ;Interrupt Enable
P3     DATA  0B0H  ;Port 3
IP     DATA  0B8H  ;Interrupt Priority
ITF    DATA  0B9H  ;Interrupt Test Flags
WDCON  DATA  0C0H  ;Watchdog Control Register
WDL    DATA  0C1H  ;Watchdog Reload Value - Low Byte
WDH    DATA  0C2H  ;Watchdog Reload Value - High Byte
WFEED1 DATA  0C3H  ;Watchdog Feeding Register 1
WFEED2 DATA  0C4H  ;Watchdog Feeding Register 2
ADCON  DATA  0C5H  ;A/D Converter Control
ADAT   DATA  0C6H  ;A/D Converter Data
PSW    DATA  0D0H  ;Program Status Word
ACC    DATA  0E0H  ;Accumulator
B      DATA  0F0H  ;Multiplication Register
IDLCON DATA  0FEH  ;Idle Mode Control
IT0    BIT   088H  ;TCON.0 - External Interrupt 0 Type
IE0    BIT   089H  ;TCON.1 - External Interrupt 0 Edge Flag
IT1    BIT   08AH  ;TCON.2 - External Interrupt 1 Type
IE1    BIT   08BH  ;TCON.3 - External Interrupt 1 Edge Flag
TR0    BIT   08CH  ;TCON.4 - Timer 0 On/Off Control
TF0    BIT   08DH  ;TCON.5 - Timer 0 Overflow Flag
TR1    BIT   08EH  ;TCON.6 - Timer 1 On/Off Control
TF1    BIT   08FH  ;TCON.7 - Timer 1 Overflow Flag
RI     BIT   098H  ;SCON.0 - Receive Interrupt Flag
TI     BIT   099H  ;SCON.1 - Transmit Interrupt Flag
RB8    BIT   09AH  ;SCON.2 - Receive Bit 8
TB8    BIT   09BH  ;SCON.3 - Transmit Bit 8
REN    BIT   09CH  ;SCON.4 - Receive Enable
SM2    BIT   09DH  ;SCON.5 - Serial Mode Control Bit 2
SM1    BIT   09EH  ;SCON.6 - Serial Mode Control Bit 1
SM0    BIT   09FH  ;SCON.7 - Serial Mode Control Bit 0
EX0    BIT   0A8H  ;IE.0 - External Interrupt 0 Enable
ET0    BIT   0A9H  ;IE.1 - Timer 0 Interrupt Enable
EX1    BIT   0AAH  ;IE.2 - External Interrupt 1 Enable
ET1    BIT   0ABH  ;IE.3 - Timer 1 Interrupt Enable
ES     BIT   0ACH  ;IE.4 - (SIO) Serial Port Interrupt Enable
EAD    BIT   0ADH  ;IE.5 - A/D Conversion Complete
EWD    BIT   0AEH  ;IE.6 - Watchdog Timer
EA     BIT   0AFH  ;IE.7 - Global Interrupt Enable
RXD    BIT   0B0H  ;P3.0 - Serial Port Receive Input
TXD    BIT   0B1H  ;P3.1 - Serial Port Transmit Output
INT0   BIT   0B2H  ;P3.2 - External Interrupt 0 Input
INT1   BIT   0B3H  ;P3.3 - External Interrupt 1 Input
T0     BIT   0B4H  ;P3.4 - Timer 0 Count Input
T1     BIT   0B5H  ;P3.5 - Timer 1 Count Input
WR     BIT   0B6H  ;P3.6 - Write Control for External Memory
RD     BIT   0B7H  ;P3.7 - Read Control for External Memory
PX0    BIT   0B8H  ;IP.0 - External Interrupt 0 Priority
PT0    BIT   0B9H  ;IP.1 - Timer 0 Priority
PX1    BIT   0BAH  ;IP.2 - External Interrupt 1 Priority
PT1    BIT   0BBH  ;IP.3 - Timer 1 Priority
PS     BIT   0BCH  ;IP.4 - Serial Port Priority
PAD    BIT   0BDH  ;IP.5 - A/D Converter
PWD    BIT   0BEH  ;IP.6 - Watchdog Timer
WDMOD  BIT   0C0H  ;WDCON.0 - Watchdog Mode Selection (read/write)
WDTOF  BIT   0C1H  ;WDCON.1 - Watchdog Timeout Flag (read/write)
WDRUN  BIT   0C2H  ;WDCON.2 - Watchdog Run Control (read/write)
PRE0   BIT   0C5H  ;WDCON.5 - Watchdog Prescalar Select 0 (read/write)
PRE1   BIT   0C6H  ;WDCON.6 - Watchdog Prescalar Select 1 (read/write)
PRE2   BIT   0C7H  ;WDCON.7 - Watchdog Prescalar Select 2 (read/write)
P      BIT   0D0H  ;PSW.0 - Accumulator Parity Flag
OV     BIT   0D2H  ;PSW.2 - Overflow Flag
RS0    BIT   0D3H  ;PSW.3 - Register Bank Select 0
RS1    BIT   0D4H  ;PSW.4 - Register Bank Select 1
F0     BIT   0D5H  ;PSW.5 - Flag 0
AC     BIT   0D6H  ;PSW.6 - Auxiliary Carry Flag
CY     BIT   0D7H  ;PSW.7 - Carry Flag