mod521

包括了各种常用的8051单片机的程序

;      REV   1.0     JULY 6, 1988
P0     DATA  080h   ;Port 0
SP     DATA  081h   ;Stack Pointer
DPL    DATA  082h   ;Data Pointer - Low Byte
DPH    DATA  083h   ;Data Pointer - High Byte
DPL1   DATA  084h   ;Data Pointer 1 - Low Byte
DPH1   DATA  085h   ;Data Pointer 1 - High Byte
DPS    DATA  086h   ;Data Pointer Selection
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
WDS    DATA  0A9h   ;Watchdog Selection
WDK    DATA  0AAh   ;Watchdog Key
P3     DATA  0B0h   ;Port 3
IP     DATA  0B8h   ;Interrupt Priority
PSW    DATA  0D0h   ;Program Status Word
ACC    DATA  0E0h   ;Accumulator
B      DATA  0F0h   ;Multiplication Register
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 - Serial Port Interrupt Enable
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
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