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Assembly Source File
|
1992-08-04
|
6KB
|
218 lines
FLAG equ 07eh
; Register selects
R0 equ 0000h ; Register selects
R1 equ 0100h
R2 equ 0200h
R3 equ 0300h
R4 equ 0400h
R5 equ 0500h
R6 equ 0600h
R7 equ 0700h
R8 equ 0800h
R9 equ 0900h
R10 equ 0a00h
R11 equ 0b00h
R12 equ 0c00h
R13 equ 0d00h
R14 equ 0e00h
R15 equ 0f00h
NULLCODE equ 0 ; Null Code
POINT_HIGH equ 8h ; Select upper half of registers
RES_EXT_INT equ 10h ; Reset Ext. Status Interrupts
SEND_ABORT equ 18h ; HDLC Abort
RES_RxINT_FC equ 20h ; Reset RxINT on First Character
RES_Tx_P equ 28h ; Reset TxINT Pending
ERR_RES equ 30h ; Error Reset
RES_H_IUS equ 38h ; Reset highest IUS
RES_Rx_CRC equ 40h ; Reset Rx CRC Checker
RES_Tx_CRC equ 80h ; Reset Tx CRC Checker
RES_EOM_L equ 0C0h ; Reset EOM latch
; Write Register 1
EXT_INT_ENAB equ 1h ; Ext Int Enabled
TxINT_ENAB equ 2h ; Tx Int Enable
PAR_SPEC equ 4h ; Parity is special condition
RxINT_DISAB equ 0 ; Rx Int Disable
RxINT_FCERR equ 8h ; Rx Int on First Character Only or Error
INT_ALL_Rx equ 10h ; Int on all Rx Characters or error
INT_ERR_Rx equ 18h ; Int on error only
WT_RDY_RT equ 20h ; Wait/Ready on R/T
WT_FN_RDYFN equ 40h ; Wait/FN/Ready FN
WT_RDY_ENAB equ 80h ; Wait/Ready Enable
; Write Register #2 (Interrupt Vector)
; Write Register 3
RxENABLE equ 1h ; Rx Enable
SYNC_L_INH equ 2h ; Sync Character Load Inhibit
ADD_SM equ 4h ; Address Search Mode (SDLC)
RxCRC_ENAB equ 8h ; Rx CRC Enable
ENT_HM equ 10h ; Enter Hunt Mode
AUTO_ENAB equ 20h ; Auto Enables
Rx5 equ 0h ; Rx 5 Bits/Character
Rx7 equ 40h ; Rx 7 Bits/Character
Rx6 equ 80h ; Rx 6 Bits/Character
Rx8 equ 0C0h ; Rx 8 Bits/Character
; Write Register 4
PAR_ENA equ 1h ; Parity Enable
PAR_EVEN equ 2h ; Parity Even/Odd
SYNC_ENAB equ 0h ; Sync Modes Enable
SB1 equ 4h ; 1 stop bit/char
SB15 equ 8h ; 1.5 stop bits/char
SB2 equ 0ch ; 2 stop bits/char
MONSYNC equ 0h ; 8 Bit Sync character
BISYNC equ 10h ; 16 bit sync character
SDLC equ 20h ; SDLC Mode (01111110 Sync Flag)
EXTSYNC equ 30h ; External Sync Mode
X1CLK equ 0h ; x1 clock mode
X16CLK equ 40h ; x16 clock mode
X32CLK equ 80h ; x32 clock mode
X64CLK equ 0C0h ; x64 clock mode
; Write Register 5
TxCRC_ENAB equ 1h ; Tx CRC Enable
RTS equ 2h ; RTS
SDLC_CRC equ 4h ; SDLC/CRC-16
TxENAB equ 8h ; Tx Enable
SND_BRK equ 10h ; Send Break
Tx5 equ 0h ; Tx 5 bits (or less)/character
Tx7 equ 20h ; Tx 7 bits/character
Tx6 equ 40h ; Tx 6 bits/character
Tx8 equ 60h ; Tx 8 bits/character
DTR equ 80h ; DTR
; Write Register 6 (Sync bits 0-7/SDLC Address Field)
; Write Register 7 (Sync bits 8-15/SDLC 01111110)
; Write Register 8 (transmit buffer)
; Write Register 9 (Master interrupt control)
VIS equ 1h ; Vector Includes Status
NV equ 2h ; No Vector
DLC equ 4h ; Disable Lower Chain
MIE equ 8h ; Master Interrupt Enable
STATHI equ 10h ; Status high
NORESET equ 0h ; No reset on write to R9
CHRB equ 40h ; Reset channel B
CHRA equ 80h ; Reset channel A
FHWRES equ 0c0h ; Force hardware reset
; Write Register 10 (misc control bits)
BIT6 equ 1h ; 6 bit/8bit sync
LOOPMODE equ 2h ; SDLC Loop mode
ABUNDER equ 4h ; Abort/flag on SDLC xmit underrun
MARKIDLE equ 8h ; Mark/flag on idle
GAOP equ 10h ; Go active on poll
NRZ equ 0h ; NRZ mode
NRZI equ 20h ; NRZI mode
FM1 equ 40h ; FM1 (transition = 1)
FM0 equ 60h ; FM0 (transition = 0)
CRCPS equ 80h ; CRC Preset I/O
; Write Register 11 (Clock Mode control)
TRxCXT equ 0h ; TRxC = Xtal output
TRxCTC equ 1h ; TRxC = Transmit clock
TRxCBR equ 2h ; TRxC = BR Generator Output
TRxCDP equ 3h ; TRxC = DPLL output
TRxCOI equ 4h ; TRxC O/I
TCRTxCP equ 0h ; Transmit clock = RTxC pin
TCTRxCP equ 8h ; Transmit clock = TRxC pin
TCBR equ 10h ; Transmit clock = BR Generator output
TCDPLL equ 18h ; Transmit clock = DPLL output
RCRTxCP equ 0h ; Receive clock = RTxC pin
RCTRxCP equ 20h ; Receive clock = TRxC pin
RCBR equ 40h ; Receive clock = BR Generator output
RCDPLL equ 60h ; Receive clock = DPLL output
RTxCX equ 80h ; RTxC Xtal/No Xtal
; Write Register 12 (lower byte of baud rate generator time constant)
; Write Register 13 (upper byte of baud rate generator time constant)
; Write Register 14 (Misc control bits)
BRENABL equ 1h ; Baud rate generator enable
BRSRC equ 2h ; Baud rate generator source
DTRREQ equ 4h ; DTR/Request function
AUTOECHO equ 8h ; Auto Echo
LOOPBAK equ 10h ; Local loopback
SEARCH equ 20h ; Enter search mode
RMC equ 40h ; Reset missing clock
DISDPLL equ 60h ; Disable DPLL
SSBR equ 80h ; Set DPLL source = BR generator
SSRTxC equ 0a0h ; Set DPLL source = RTxC
SFMM equ 0c0h ; Set FM mode
SNRZI equ 0e0h ; Set NRZI mode
; Write Register 15 (external/status interrupt control)
ZCIE equ 2h ; Zero count IE
DCDIE equ 8h ; DCD IE
SYNCIE equ 10h ; Sync/hunt IE
CTSIE equ 20h ; CTS IE
TxUIE equ 40h ; Tx Underrun/EOM IE
BRKIE equ 80h ; Break/Abort IE
; Read Register 0
Rx_CH_AV equ 1h ; Rx Character Available
ZCOUNT equ 2h ; Zero count
Tx_BUF_EMP equ 4h ; Tx Buffer empty
DCD equ 8h ; DCD
SYNC_HUNT equ 10h ; Sync/hunt
CTS equ 20h ; CTS
TxEOM equ 40h ; Tx underrun
BRK_ABRT equ 80h ; Break/Abort
; Read Register 1
ALL_SNT equ 1h ; All sent
; Residue Data for 8 Rx bits/char programmed
RES3 equ 8h ; 0/3
RES4 equ 4h ; 0/4
RES5 equ 0ch ; 0/5
RES6 equ 2h ; 0/6
RES7 equ 0ah ; 0/7
RES8 equ 6h ; 0/8
RES18 equ 0eh ; 1/8
RES28 equ 0h ; 2/8
; Special Rx Condition Interrupts
PAR_ERR equ 10h ; Parity error
Rx_OVR equ 20h ; Rx Overrun Error
CRC_ERR equ 40h ; CRC/Framing Error
END_FR equ 80h ; End of Frame (SDLC)
; Read Register 2 (channel b only) - Interrupt vector
; Read Register 3 (interrupt pending register) ch a only
CHBEXT equ 1h ; Channel B Ext/Stat IP
CHBTxIP equ 2h ; Channel B Tx IP
CHBRxIP equ 4h ; Channel B Rx IP
CHAEXT equ 8h ; Channel A Ext/Stat IP
CHATxIP equ 10h ; Channel A Tx IP
CHARxIP equ 20h ; Channel A Rx IP
; Read Register 8 (receive data register)
; Read Register 10 (misc status bits)
ONLOOP equ 2h ; On loop
LOOPSEND equ 10h ; Loop sending
CLK2MIS equ 40h ; Two clocks missing
CLK1MIS equ 80h ; One clock missing
; Read Register 12 (lower byte of baud rate generator constant)
; Read Register 13 (upper byte of baud rate generator constant)
; Read Register 15 (value of WR 15)