Prev: Vic-20 joystick help needed!
Next: Q-Link Reloaded
From: JB on 20 Oct 2009 21:56
Here is a working Swiftlink/Turbo232 Driver.

Most of the code is from the Novaterm Source which was released to the
public. Thanks Nick.
It was compiled using 64Tass. Should be self explanitory but feel
free to ask questions.
Please Note. I am not the greatest ML programmer. I am sure there
are better ways of doing some of these routines. So please, don't be
a hater. If you have a better way, contact me and we can correct the
code.

Thanks for looking

---------------------------------------------------------------------------------------------------------------------------------------------

; WORKING SWIFTLINK DRIVER 10/20/2009 JEFF BROWN

; OPEN MODEM CHANNEL [OPEN 5,2,2,CHR$(6)]
; SYS ORIG = TEST FOR SWIFTLINK
; SYS ORIG+3 = SETUP NMI AND OTHER VECTORS
; SYS ORIG+6 = ENABLE SWIFTLINK INTERRUPTS
;
; YOU CAN USE PRINT#5 AND GET#5 COMMANDS FROM BASIC WITH THIS ROUTINE
;
; THANKS TO NICK ROSSI FOR MOST OF THIS CODE FROM HIS NOVATERM SOURCE
; AUTHORS OF CNET, IMAGE, CBASE HAVE ALSO BEEN AN INSPIRATION
;
; 64TASS FORMAT



*= $C000

STOP = 1
START = 0

RTAIL = $029B
RHEAD = $029C
RFREE = $029D
RFLOW = $029E
IBSOUT = $0326
DEFTO = $9A
CHKOUT = $FFC9
CHKIN = $FFC6
CHROUT = $FFD2
SWIFT = $DE00 ; CAN BE CHANGED TO DF00 OR D700 DEPENDING ON YOUR
APPLICATION

SW_DATA = SWIFT ; SWIFTLINK REGISTERS
SW_STAT = SWIFT+1
SW_CMD = SWIFT+2
SW_CTRL = SWIFT+3
SW_BAUD = SWIFT+7


JMP TEST ; (0) TEST FOR SWIFTLINK HARDWARE
JMP INIT ; (3) SETUP VECTORS AND DEFAULT BAUD RATE
JMP INABLE ; (6) ENABLE SWIFTLINK
JMP DISABL ; (9) DISABLE SL INTERRUPTS
JMP CARCHK ; (12) CHECK FOR CARRIER 1 = CARRIER 0 = NO CARRIER
JMP RSGET ; (15) GET BYTE FROM SWIFTLINK
JMP JBGET ; (18) SAME AS RSGET BUT RETURNS 0 IF NO CHAR DOES NOT SET
CARRY FLAG
JMP RSOUT ; (21) OUTPUT BYTE THROUGH SWIFTLINK
JMP SETBAUD ; (24) SET BAUD RATE
JMP DROPDTR ; (27) DROP DTR TO HANG UP
JMP TERM ; (30) SIMPLE TERMINAL MODE. F1 EXITS


NMI PHA
TXA
PHA
TYA
PHA
LDA SW_STAT
AND #%00001000 ; MASK OUT ALL BUT RECEIVE INTERRUPT REG
BNE NMI1
SEC ; SET CARRY UPON RETURN
BCS RECCH1
NMI1 LDA SW_CMD
ORA #%00000010 ; DISABLE RECEIVE INTERRUPTS
STA SW_CMD
RECCHAR LDA SW_DATA
JSR PUTREC ; PUT CHAR IN REC BUFFER
RECCH0 LDA SW_CMD
AND #%11111101 ; RE-ENABLE RECEIVE INTERRUPT
STA SW_CMD
CLC
RECCH1 PLA
TAY
PLA
TAX
PLA
RTI



SWWAIT LDA SW_CMD
ORA #%00001000 ; ENABLE TRANSMITTER
STA SW_CMD
LDA SW_STAT
AND #%00110000
BEQ SWWAIT
RTS

RSOUT STA $9E
LDA SW_CMD
STA TEMP
JSR SWWAIT
LDA $9E
STA SW_DATA
JSR SWWAIT
LDA TEMP ; RESTORE RTS STATE
STA SW_CMD
LDA $9E
CLC
RTS


RSGET STY $9F
LDY RHEAD
CPY RTAIL
BEQ RET2
LDA ($F7),Y ;LDA RECBUF,Y
RSGET1 INC RHEAD
INC RFREE
LDY PAUSED ; ARE WE STOPPED?
BEQ RET0 ; NO, DON'T BOTHER
PHA
LDA RFREE ; CHECK BUFFER FREE
CMP #240 ; AGAINST RESTART LIMIT
BCC RSG1 ; IS IT LARGER
TXA
PHA
LDX #START
STX PAUSED
JSR FLOW

PLA
TAX
RSG1 PLA
RET0 STA $9E
RET1 CLC
RET2 LDY $9F
LDA $9E
RTS


INABLE LDA SW_CMD
AND #%11111101 ; ENABLE RECEIVE INTERRUPT
STA SW_CMD
RTS

DISABL LDA SW_CMD
ORA #%00000010 ; DISABLE RECEIVE INTERRUPT
STA SW_CMD
RTS

FLOW LDA SW_CMD
AND #%11110011
CPX #STOP
BEQ FL1
ORA #%00001000
FL1 STA SW_CMD
RTS

SETBAUD TAX
LDA SW_CTRL
AND #$F0
ORA SWBAUD,X
STA SW_CTRL
RTS


BREAK LDA SW_CMD
PHA
ORA #%00001100 ; SEND BREAK
STA SW_CMD
BKRWAIT LDX #240
STX $A2
BR1 BIT $A2
BMI BR1
PLA
STA SW_CMD
RTS

PUTREC LDX RFREE
BEQ PR1
LDY RTAIL
STA ($F7),Y
INC RTAIL
DEC RFREE
PR1 CPX #50 ; CHECK BYTE COUNT AGAINST TOLERANCE
BCC PR2 ; IS IT OVER THE TOP?
LDX #STOP
STX PAUSED
JSR FLOW
PR2 RTS


TEST LDA #$09
STA SW_CMD
LDA #0
STA SW_STAT
LDA #11
STA SW_CMD
LDA SW_CMD
CMP #11
BNE TEST11
DEC TESTED
LDA #0
TEST11 RTS

INIT SEI
LDA $318
LDX $319
STA OLDNMI
STX OLDNMI+1

LDA $326
LDX $327
STA OLDOUT
STX OLDOUT+1

LDA #<NEWOUT
LDX #>NEWOUT
STA $326
STX $327

LDA $32A
LDX $32B
STA OLDIN
STX OLDIN+1

LDA #<NEWIN
LDX #>NEWIN
STA $32A
STX $32B

LDA #<NMI
LDX #>NMI
STA $0318
STX $0319
CLI

LDA #$FF
STA RFREE

LDA #4 ;0=300, 1=1200, 2=2400,3=4800,4=9600, 5=19200, 6=38400
JSR SETBAUD
LDA #0
RTS

CARCHK LDA SW_STAT
AND #64
BNE CAR11
LDA #1
RTS
CAR11 LDA #0
RTS

DROPDTR LDA SW_CMD
AND #%11111110
STA SW_CMD
LDX #226
STX $A2
WAIT30 BIT $A2
BMI WAIT30
ORA #%00000001
STA SW_CMD
RTS


NEWOUT PHA ;DUPLICIATON OF ORIGINAL KERNAL ROUTINES
LDA $9A ;TEST DFAULT OUTPUT DEVICE FOR
CMP #$02 ;SCREEN, AND...
BEQ +
PLA ;IF SO, GO BACK TO ORIGINAL ROM ROUTINES
JMP (OLDOUT)

+ PLA
JMP RSOUT


NEWIN LDA $99
CMP #2 ; SEE IF DEFAULT INPUT IS MODEM
BEQ +
JMP (OLDIN) ; NOPE, GO BACK TO ORIGINAL

+ JMP JBGET ; GET CHAR FROM MODEM

TERM LDA #0

TERMA JSR $FFCC
JSR CARCHK
STA $0400
JSR $FFE4
BEQ TERM1
CMP #133
BNE TERM2
RTS

TERM2 CMP #172 ; COMMODRE-D = DROPDTR
BNE TERMZZ
JSR DROPDTR
JMP TERM

TERMZZ PHA
LDX #5
JSR CHKOUT
PLA
JSR $FFD2
JMP TERMA

TERM1 LDX #5
JSR CHKIN
JSR $FFE4
BEQ TERMA
JSR $FFD2 ;OUTPUT
JMP TERM


JBGET JSR RSGET ; THIS EMULATES THE STANDARD $FFE4 ROUTINE
BCS + ; IF NO CHARACTER, THEN RETURN 0 IN A
RTS
+ CLC
LDA #0
RTS



OLDNMI .WORD 0
OLDIN .WORD 0
OLDOUT .WORD 0
TEMP .BYTE 0
TESTED .BYTE 0
PAUSED .BYTE 0

SWBAUD .BYTE $15,$17,$18,$1A,$1C,$1E,$1F,$10,$10,$10






From: rusure on 21 Oct 2009 00:10
>; OPEN MODEM CHANNEL [OPEN 5,2,2,CHR$(6)]
>; YOU CAN USE PRINT#5 AND GET#5
> COMMANDS FROM BASIC WITH THIS ROUTINE

I don't know about other peoples' SWIFTLinks but mine plugs into the
GAME or CARTRIDGE port unlike a modem which ordinarily plugs into the
USER port. Is any communication with deviice #2 transmitted to a
SWIFTLink with this code?
From: JB on 21 Oct 2009 07:49
On Oct 21, 12:10 am, rusure <r_u_s...(a)mybluelight.com> wrote:
> >; OPEN MODEM CHANNEL  [OPEN 5,2,2,CHR$(6)]
> >; YOU CAN USE PRINT#5 AND GET#5
> > COMMANDS  FROM BASIC WITH THIS ROUTINE
>
> I don't know about other peoples' SWIFTLinks but mine plugs into the
> GAME or CARTRIDGE port unlike a modem which ordinarily plugs into the
> USER port.  Is any communication with deviice #2 transmitted to a
> SWIFTLink with this code?

Yes it works.

The ML Redirects the CHROUT and GETIN vectors and checks to see if you
are trying to get in/out from the modem if so it goes to the modem
routines, if not, it goes to the stock routines. I added this to help
improve compatibility with standard modem I/O programs such as
protocols, etc.
From: stiggity on 23 Oct 2009 09:35
On Oct 21, 7:49 am, JB <jbrown1...(a)gmail.com> wrote:
> On Oct 21, 12:10 am, rusure <r_u_s...(a)mybluelight.com> wrote:
>
> > >; OPEN MODEM CHANNEL  [OPEN 5,2,2,CHR$(6)]
> > >; YOU CAN USE PRINT#5 AND GET#5
> > > COMMANDS  FROM BASIC WITH THIS ROUTINE
>
> > I don't know about other peoples' SWIFTLinks but mine plugs into the
> > GAME or CARTRIDGE port unlike a modem which ordinarily plugs into the
> > USER port.  Is any communication with deviice #2 transmitted to a
> > SWIFTLink with this code?
>
> Yes it works.
>
> The ML Redirects the CHROUT and GETIN vectors and checks to see if you
> are trying to get in/out from the modem if so it goes to the modem
> routines, if not, it goes to the stock routines.  I added this to help
> improve compatibility with standard modem I/O programs such as
> protocols, etc.

Boy those swiftlink routines look very familiar.. ehehe thanks
novaterm!! eheheh
 | 
Pages: 1
Prev: Vic-20 joystick help needed!
Next: Q-Link Reloaded