mod2080

主要是8051源代码

;      REV.  1.0    JUNE 23, 1987
P0     DATA  080H  ;PORT 0
SP     DATA  081H  ;STACK POINTER
DPL    DATA  082H  ;DATA POINTER - LOW BYTE
DPH    DATA  083H  ;DATA POINTER - HIGH BYTE
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
SSTAT0 DATA  098H  ;SERIAL PORT STATUS WORD 0
SBUF   DATA  099H  ;SERIAL PORT DATA BUFFER
P2     DATA  0A0H  ;PORT 2
IE     DATA  0A8H  ;INTERRUPT ENABLE
SSTAT1 DATA  0A9H  ;SERIAL PORT STATUS WORD 1
P3     DATA  0B0H  ;PORT 3
IP     DATA  0B8H  ;INTERRUPT PRIORITY
SADDR  DATA  0B9H  ;SERIAL ADDRESS
PSW    DATA  0D0H  ;PROGRAM STATUS WORD
ACC    DATA  0E0H  ;ACCUMULATOR
P4     DATA  0E8H  ;PORT 4
B      DATA  0F0H  ;MULTIPLICATION REGISTER
IT0    BIT   088H  ;TCON.0 - EXT. INTERRUPT 0 TYPE
IE0    BIT   089H  ;TCON.1 - EXT. INTERRUPT 0 EDGE FLAG
IT1    BIT   08AH  ;TCON.2 - EXT. INTERRUPT 1 TYPE
IE1    BIT   08BH  ;TCON.3 - EXT. 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
ADR    BIT   098H  ;SSTAT0.0 - ADDRESS FLAG
ACK    BIT   099H  ;SSTAT0.1 - ACKNOWLEDGE FLAG
LRB    BIT   09AH  ;SSTAT0.2 - LAST RECEIVED BIT
AL     BIT   09BH  ;SSTAT0.3 - ARBITRATION LOST FLAG
SIN    BIT   09CH  ;SSTAT0.4 - SERIAL INTERRUPT REQUEST
BB     BIT   09DH  ;SSTAT0.5 - BUS BUSY
TRX    BIT   09EH  ;SSTAT0.6 - TRANSMIT DATA ENABLE
MST    BIT   09FH  ;SSTAT0.7 - MASTER DEVICE SELECT
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
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
F1     BIT   0D1H  ;PSW.1 - FLAG 0
OV     BIT   0D2H  ;PSW.2 - OVERFLOW FLAG
RS0    BIT   0D3H  ;PWS.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
SDA    BIT   0E8H  ;P4.0 - SERIAL DATA
SCL    BIT   0E9H  ;P4.1 - SERIAL CLOCK