📄 install.a51
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CKCON DATA 08EH
SCON1 DATA 0C0H
SBUF1 DATA 0C1H
WDCON DATA 0D8H
RI1 BIT 0C0H.0
InitSerial: PROMCHECK ; Check if PROM in System
MOV DPS,#00H
MOV TMOD,#00100000B ;C/T = 0, Mode = 2
MOV TH1,#0F6H ; 9600 baud @ 12 MHz
ORL CKCON,#010H ; Timer 1 uses a divide by 4 clock
; ORL WDCON,#10000000B; 19200 baud @ 12 MHz
; MOV TH1,#0FDH ; 9600 baud @ 11.0592 MHz
; MOV TH1,#0FFH ; 57600 baud @ 11.0592 MHz
; ORL WDCON,#10000000B
; MOV TH1,#0E5H ; 9600 baud @ 33 MHz
; ORL CKCON,#010H ; Timer 1 uses a divide by 4 clock
; ORL WDCON,#10000000B; 19200 baud @ 33 MHz
SETB TR1
MOV SCON1,#01011010B ; Init Serial Interface
JMP Mon51
$ENDIF
$IF (SERIAL = 6)
;********************************************************************
;* Using external UART 16450/16550 *
;* UART Oscillator frequency = 12.000 MHz *
;* Set Baudrate to 9600 Baud *
;********************************************************************
SIOCLK EQU 3686400 ; EXTERNAL SIO XTAL FREQUENZY
BAUDRATE EQU 9600 ;9600 bps
BAUDDIV EQU (SIOCLK / 16) / BAUDRATE
SIOADDR EQU 0FC00H ; SIO Address
InitSerial: PROMCHECK ; Check if PROM in System
MOV DPTR,#SIOADDR+3
MOV A,#83H ; Select Baudrate Registers
MOVX @DPTR,A
MOV DPTR,#SIOADDR
MOV A,#LOW (BAUDDIV)
MOVX @DPTR,A
INC DPTR
MOV A,#HIGH (BAUDDIV)
MOVX @DPTR,A
MOV DPTR,#SIOADDR+3
MOV A,#03H ; Mode: 8-bit, 1 stop, no parity
MOVX @DPTR,A
MOV DPTR,#SIOADDR+1
CLR A
MOVX @DPTR,A ; disable all interrupts
MOV DPTR,#SIOADDR+4
MOVX @DPTR,A
JMP Mon51
$ELSEIF (SERIAL = 7)
;********************************************************************
;* Using Timer 1 to generate Baud Rates *
;* for 8052 and compatibles except Dallas 80C320/520/530 *
;* Oscillator frequency = don't care *
;* Automatic Baudrate Adjustment *
;********************************************************************
InitSerial: PROMCHECK ; Check if PROM in System
CLR TR1
CLR TF1
CLR A
MOV TL1,A
MOV TH1,A
MOV TMOD,#010H
L4: JB RXD,L4
L6: JNB RXD,L6
L7: SETB TR1
L8: JNB RXD,L10
JNB TF1,L8
L10: JNB RXD,L10
L12: JNB RXD,L14
JNB TF1,L12
L14: JNB RXD,L14
L15: CLR TR1
JB TF1,InitSerial
MOV R7,TL1
MOV R6,TH1
MOV A,R7
ADD A,#040H
MOV R7,A
CLR A
ADDC A,R6
MOV R6,A
MOV A,R7
RLC A
MOV A,R6
RLC A
MOV R7,A
CLR C
CLR A
SUBB A,R7
MOV TH1,A
CLR A
MOV TL1,A
MOV TMOD,#00100000B ;C/T = 0, Mode = 2
SETB TR1
ORL PCON,#080H
MOV SCON,#05AH
L16: CLR RI
JNB RI,$
MOV A,SBUF
CJNE A,#011H,L16
JMP Mon51
$ELSEIF (SERIAL = 8)
;********************************************************************
;* Using Timer 2 to generate Baud Rates (8052 and compatibles) *
;* Oscillator frequency = don't care *
;* Automatic Baudrate Adjustment *
;********************************************************************
T2CON DATA 0C8H
T2MOD DATA 0C9H
RC2L DATA 0CAH
RC2H DATA 0CBH
TL2 DATA 0CCH
TH2 DATA 0CDH
TR2 BIT 0C8H.2
TF2 BIT 0C8H.7
InitSerial: PROMCHECK ; Check if PROM in System
CLR A
MOV RC2H,A
MOV RC2L,A
MOV TL2,A
MOV TH2,A
MOV T2MOD,A
MOV T2CON,A
L4: JB RXD,L4
L6: JNB RXD,L6
L7: SETB TR2
L8: JNB RXD,L10
JNB TF2,L8
L10: JNB RXD,L10
L12: JNB RXD,L14
JNB TF2,L12
L14: JNB RXD,L14
L15: CLR TR2
JB TF2,InitSerial
MOV R7,TL2
MOV R6,TH2
MOV A,R6
CLR C
RRC A
MOV R4,A
MOV A,R7
RRC A
ADD A,R7
MOV R7,A
MOV A,R4
ADDC A,R6
MOV R6,A
MOV A,R7
ADD A,#010H
MOV R7,A
CLR A
ADDC A,R6
MOV R6,A
MOV A,R7
MOV R0,#05H
L22: XCH A,R6
CLR C
RRC A
XCH A,R6
RRC A
DJNZ R0,L22
MOV R7,A
CLR C
CLR A
SUBB A,R7
MOV RC2L,A
MOV TL2,A
CLR A
SUBB A,R6
MOV RC2H,A
MOV TH2,A
MOV T2CON,#034H
MOV SCON,#05AH
L16: CLR RI
JNB RI,$
MOV A,SBUF
CJNE A,#011H,L16
JMP Mon51
$ELSEIF (SERIAL = 9)
;********************************************************************
;* Using internal Baudrate Generator to generate Baud Rates *
;* Oscillator frequency = don't care *
;* Automatic Baudrate Adjustment *
;********************************************************************
SRELL DATA 0AAH
SRELH DATA 0BAH
ADCON DATA 0D8H
BD BIT 0D8H.7
InitSerial: PROMCHECK ; Check if PROM in System
CLR TR1
CLR TF1
CLR A
MOV TL1,A
MOV TH1,A
MOV TMOD,#010H
L4: JB RXD,L4
L6: JNB RXD,L6
L7: SETB TR1
L8: JNB RXD,L10
JNB TF1,L8
L10: JNB RXD,L10
L12: JNB RXD,L14
JNB TF1,L12
L14: JNB RXD,L14
L15: CLR TR1
JB TF1,InitSerial
MOV R7,TL1
MOV R6,TH1
MOV A,R6
CLR C
RRC A
MOV R4,A
MOV A,R7
RRC A
ADD A,R7
MOV R7,A
MOV A,R4
ADDC A,R6
MOV R6,A
MOV A,R7
ADD A,#010H
MOV R7,A
CLR A
ADDC A,R6
MOV R6,A
MOV A,R7
MOV R0,#05H
L22: XCH A,R6
CLR C
RRC A
XCH A,R6
RRC A
DJNZ R0,L22
MOV R7,A
CLR C
CLR A
SUBB A,R7
MOV SRELL,A
MOV A,#04H
SUBB A,R6
MOV SRELH,A
SETB BD
ORL PCON,#080H
MOV SCON,#05AH
CLR TF1
CLR A
MOV TL1,A
MOV TH1,A
MOV TMOD,A
L16: CLR RI
JNB RI,$
MOV A,SBUF
CJNE A,#011H,L16
JMP Mon51
$ELSEIF (SERIAL = 10)
;********************************************************************
;* Using internal Baudrate Generator with serial interface 1 *
;* Only for 80C517 and 80C517A *
;* Oscillator frequency = don't care *
;* Automatic Baudrate Adjustment *
;********************************************************************
S1REL DATA 09DH
S1RELH DATA 0BBH
S1CON DATA 09BH
S1BUF DATA 09CH
P6 DATA 0FAH
IEN2 DATA 09AH
InitSerial: PROMCHECK ; Check if PROM in System
CLR TR1
CLR TF1
CLR A
MOV TL1,A
MOV TH1,A
MOV TMOD,#010H
L4: MOV A,P6
JB ACC.1,L4
L6: MOV A,P6
JNB ACC.1,L6
L7: SETB TR1
L8: MOV A,P6
JNB ACC.1,L10
JNB TF1,L8
L10: MOV A,P6
JNB ACC.1,L10
L12: MOV A,P6
JNB ACC.1,L14
JNB TF1,L12
L14: MOV A,P6
JNB ACC.1,L14
L15: CLR TR1
JB TF1,InitSerial
MOV R7,TL1
MOV R6,TH1
MOV A,R6
CLR C
RRC A
MOV R4,A
MOV A,R7
RRC A
ADD A,R7
MOV R7,A
MOV A,R4
ADDC A,R6
MOV R6,A
MOV A,R7
ADD A,#010H
MOV R7,A
CLR A
ADDC A,R6
MOV R6,A
MOV A,R7
MOV R0,#05H
L22: XCH A,R6
CLR C
RRC A
XCH A,R6
RRC A
DJNZ R0,L22
MOV R7,A
CLR C
CLR A
SUBB A,R7
MOV S1REL,A
MOV A,#04H
SUBB A,R6
MOV S1RELH,A
MOV S1CON,#10111010B ; Init Serial Interface
CLR TF1
CLR A
MOV TL1,A
MOV TH1,A
MOV TMOD,A
L16: ANL S1CON,#0FEH
L17: MOV A,S1CON
JNB ACC.0,L17
MOV A,S1BUF
CJNE A,#011H,L16
JMP Mon51
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