mod452

主要是8051源代码

;      REV.  1.1    MAY 26, 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
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
DCON0  DATA  092H  ;DMA Control 0
DCON1  DATA  093H  ;DMA Control 1
SCON   DATA  098H  ;LSC Control
SBUF   DATA  099H  ;LSC Buffer
P2     DATA  0A0H  ;Port 2
SARL0  DATA  0A2H  ;DMA Channel 0 Source Address - Low Byte
SARH0  DATA  0A3H  ;DMA Channel 0 Source Address - High Byte
IE     DATA  0A8H  ;Interrupt Enable Register 0
P3     DATA  0B0H  ;Port 3
SARL1  DATA  0B2H  ;DMA Channel 1 Source Address - Low Byte
SARH1  DATA  0B3H  ;DMA Channel 1 Source Address - High Byte
IP     DATA  0B8H  ;Interrupt Priority Register 0
P4     DATA  0C0H  ;Port 4
DARL0  DATA  0C2H  ;DMA Channel 0 Destination Address - Low Byte
DARH0  DATA  0C3H  ;DMA Channel 0 Destination Address - High Byte
PSW    DATA  0D0H  ;Program Status Word
DARL1  DATA  0D2H  ;DMA Channel 1 Destination Address - Low Byte
DARH1  DATA  0D3H  ;DMA Channel 1 Destination Address - High Byte
ACC    DATA  0E0H  ;Accumulator
BCRL0  DATA  0E2H  ;DMA Byte Count 0 - Low Byte
BCRH0  DATA  0E3H  ;DMA Byte Count 0 - High Byte
HSTAT  DATA  0E6H  ;Host Status
HCON   DATA  0E7H  ;Host Control
SLCON  DATA  0E8H  ;Slave Control
SSTAT  DATA  0E9H  ;Slave Status
IWPR   DATA  0EAH  ;Input Write Pointer
IRPR   DATA  0EBH  ;Input Read Pointer
CBP    DATA  0ECH  ;Channel Boundary Pointer
FIN    DATA  0EEH  ;FIFO In
CIN    DATA  0EFH  ;Command In
B      DATA  0F0H  ;Multiplication Register
BCRL1  DATA  0F2H  ;DMA Byte Count 1 - Low Byte
BCRH1  DATA  0F3H  ;DMA Byte Count 1 - High Byte
ITHR   DATA  0F6H  ;Input FIFO Threshold
OTHR   DATA  0F7H  ;Output FIFO Threshold
IEP    DATA  0F8H  ;Interrupt Enable & Priority
MODE   DATA  0F9H  ;Mode Register
ORPR   DATA  0FAH  ;Output Read Pointer
OWPR   DATA  0FBH  ;Output Write Pointer
IMIN   DATA  0FCH  ;Immediate Command In
IMOUT  DATA  0FDH  ;Immediate Command Out
FOUT   DATA  0FEH  ;FIFO Out
COUT   DATA  0FFH  ;Command Out
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
HLD    BIT   095H  ;P1.5 - Local Bus Hold I/O Signal
HLDA   BIT   096H  ;P1.6 - Local Bus Hold Acknowledge Output
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 Request 0 Enable
ET0    BIT   0A9H  ;IE.1 - Internal Timer/Counter 0 Overflow Interrupt Enable
EX1    BIT   0AAH  ;IE.2 - External Interrupt Request 1 Enable
ET1    BIT   0ABH  ;IE.3 - Internal Timer/Counter 1 Overflow 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 Ext. Memory
RD     BIT   0B7H  ;P3.7 - Read Control For Ext. Memory
PX0    BIT   0B8H  ;IP.0 - External Interrupt Request 0 Priority
PT0    BIT   0B9H  ;IP.1 - Internal Timer/Counter 0 Priority
PX1    BIT   0BAH  ;IP.2 - External Interrupt Request 1 Priority
PT1    BIT   0BBH  ;IP.3 - Internal Timer/Counter 1 Priority
PSC    BIT   0BCH  ;IP.4 - Local Serial Port (Channel) 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
OFRS   BIT   0E8H  ;SLCON.0 - Output FIFO Channel Request for Service
IFRS   BIT   0E9H  ;SLCON.1 - Input FIFO Channel Request for Service
FRZ    BIT   0EBH  ;SLCON.3 - Enable FIFO DMA Freeze Mode
ICOI   BIT   0ECH  ;SLCON.4 - Generate Interrupt when Immediate Command Out Register Available
ICII   BIT   0EDH  ;SLCON.5 - Generate Interrupt when a command is written to Immediate Command In Register
OFI    BIT   0EEH  ;SLCON.6 - Enable Output FIFO Interrupt
IFI    BIT   0EFH  ;SLCON.7 - Enable Input FIFO Interrupt
EFIFO  BIT   0F8H  ;IEP.0 - FIFO Slave Bus Interface Interrupt Enable
PDMA1  BIT   0F9H  ;IEP.1 - DMA Channel 1 Priority
PDMA0  BIT   0FAH  ;IEP.2 - DMA Channel 0 Priority
EDMA1  BIT   0FBH  ;IEP.3 - DMA Channel 1 Interrupt Enable
EDMA0  BIT   0FCH  ;IEP.4 - DMA Channel 0 Interrupt Enable
PFIFO  BIT   0FDH  ;IEP.5 - FIFO Slave Bus Interface Interrupt Priority