CD-ROM's,
DAT's,
Hard Disks,
Floppies/Flopticals,
Joysticks,
Magneto Opticals,
Memory,
CDR's (Writeable CD-ROM's),
DLT's (Digital Linear Tape),
Mice
The hard thing with it is to wire the good cable :
/* DB Male WG DIN8 Male(Indigo/Indy) Name -----1---------------------7-----------------DCD -----2---------------------5-----------------RD -----3---------------------3-----------------TD -----4---------------------1-----------------DTR -----5---------------------8-----------------SG -----7---------------------6-----------------RTS -----8---------------------2-----------------CTS DB Male WG DB9 Male (Onyx) Name -----1----------------------8---------------DCD -----2----------------------3---------------RD -----3----------------------2---------------TD -----4----------------------9---------------DTR -----5----------------------7---------------SG -----7----------------------4---------------RTS -----8----------------------5---------------CTS */ then you need to power the device, and that can be done directly from the DTR and RTS signals that have to remain high. Here is a kind of minimal demo that can easilly be used in a C program: /* * Minimal Demo for using Colorado Spectrum Workstation Gameport * * David NAHON / Tristan LORACH - 3/9/95 * Z.A.Production, 64 rue de la Folie Mericourt, 75011 PARIS - FRANCE * voice:33 (1) 48 06 65 66, fax:33 (1) 48 06 48 75, e-mail:nahond@ccr.jussieu.fr * * Feel free to use or distribute this code the way you want. * * This code is provided as is, without any waranty. The authors are not * responsible for any damage due to the use of this code. * */ #include <unistd.h> #include <termios.h> #include <fcntl.h> #include <stdio.h> extern int sginap (long ticks); typedef struct _WG_State { int buttons; int joy1_pot1; int joy1_pot2; int joy2_pot1; int joy2_pot2; } WG_State ; #define READBLOCK 0 #define READNONBLOCK 1 #define JOY_BUT_1 1 #define JOY_BUT_2 2 #define JOY_BUT_3 4 #define JOY_BUT_4 8 #define JOY1_POT1 1 #define JOY1_POT2 2 #define JOY2_POT1 3 #define JOY2_POT2 4 char values[6]={0, 0, 0, 0, 0, 0}; int joyfd; /****************************************************************** * */ void get_joystick(WG_State* wgs) { int n; char byte0; /* wait for sync byte that is always 0*/ do { n=read(joyfd, &byte0, 1); /* printf("%d %c\n", n, byte0); */ if (n==-1) { fprintf(stderr, "Error reading joy fd\n"); return; } } while((byte0!=0)); n=read(joyfd, values, 5); if (n==-1) { fprintf(stderr, "Error reading joy fd\n"); return; } wgs->buttons = (values[0] - 0xf) >> 4; wgs->joy1_pot1 = (int)values[JOY1_POT1]; wgs->joy1_pot2 = (int)values[JOY1_POT2]; wgs->joy2_pot1 = (int)values[JOY2_POT1]; wgs->joy2_pot2 = (int)values[JOY2_POT2]; } void get_joystick_NON_BLOCK(WG_State* wgs) { int n; char byte0; /* wait for sync byte that is always 0*/ do { n=read(joyfd, &byte0, 1); /* printf("%d %c\n", n, byte0); */ if (n==-1) return; } while( (n!=1) || (byte0!=0) ); n=read(joyfd, values, 5); if (n==-1) return; wgs->buttons = (values[0] - 0xf) >> 4; wgs->joy1_pot1 = (int)values[JOY1_POT1]; wgs->joy1_pot2 = (int)values[JOY1_POT2]; wgs->joy2_pot1 = (int)values[JOY2_POT1]; wgs->joy2_pot2 = (int)values[JOY2_POT2]; } void init_joystick( int portnum, int nonblock ) { int result; int flags=TIOCM_DTR|TIOCM_RTS|TIOCM_LE|TIOCM_CTS; char str232[128]; struct termio termio; printf("----------------------------------------------------------------\n"); printf("Initialisation du Joystick...\n"); sprintf( str232, "/dev/ttyd%d", portnum ); printf("Use RS232-Device %s for Workstation GamePort JOYSTICK\n", str232 ); joyfd = open( str232, O_RDONLY); if ( joyfd == -1 ) { printf( "Can't open seriel port /dev/ttyd%d\n", portnum ); exit(1); } result = ioctl( joyfd, TCGETA, &termio ); if (nonblock) fcntl(joyfd, F_SETFL, FNONBLK); termio.c_iflag = 0;/*IXON|IXOFF|IGNBRK | IGNPAR;*/ termio.c_oflag = 0; termio.c_cflag = B9600 | CS8 | CREAD | CLOCAL| CSTOPB; termio.c_lflag = 0; /* -ECHO */ ioctl( joyfd, TCSETA, &termio ); /* * check if gameport is likelly to be properly powered, * i.e TIOCM_RTS and TIOCM_DTR must be high */ ioctl( joyfd, TIOCMGET,&flags ); if ( (flags&(TIOCM_RTS|TIOCM_DTR)) != (TIOCM_RTS|TIOCM_DTR) ) { fprintf(stderr, "------> TIOCM_RTS and TIOCM_DTR not 1\n"); printf("TIOCM_RTS(%d) et TIOCM_DTR(%d) / (TIOCMGET=%x)\n",TIOCM_RTS,TIOCM_DTR, flags); exit(1); } printf("Init done.\n"); printf("----------------------------------------------------------------\n"); } void print_wgstate(const WG_State* wgs) { printf("J1_POT1:%3d ", wgs->joy1_pot1 ); printf("J1_POT2:%3d ", wgs->joy1_pot2 ); printf("J2_POT1:%3d ", wgs->joy2_pot1 ); printf("J2_POT2:%3d ", wgs->joy2_pot2 ); if ( wgs->buttons & JOY_BUT_1) printf("BUT_1 "); else printf(" "); if ( wgs->buttons & JOY_BUT_2) printf("BUT_2 "); else printf(" "); if ( wgs->buttons & JOY_BUT_3) printf("BUT_3 "); else printf(" "); if ( wgs->buttons & JOY_BUT_4) printf("BUT_4 "); else printf(" "); /* printf("\r"); */ printf("\n"); fflush(stdout); } void close_joystick() { close( joyfd ); } main(int argc, char **argv) { WG_State wg_state; int nonblock=0; int portnumber=-1; if( (argc!=2) && (argc!=3) ) { printf("Usage: %s <serial_number> [nb]\n If nb is used, the serial-line read won't block\n", argv[0]); exit(1); } portnumber=atoi(argv[1]); if (!portnumber) { fprintf(stderr, "Bad port number\n"); exit(1); } if ( (argc==3) && (strcmp(argv[2], "nb")) == 0 ) /* non blocking mode */ { init_joystick( portnumber, READNONBLOCK ); while(1) { get_joystick_NON_BLOCK(&wg_state); print_wgstate(&wg_state); sginap(1); } } else { init_joystick( portnumber, READBLOCK ); while(1) { get_joystick(&wg_state); print_wgstate(&wg_state); } } }One can connect any PC joystick without doing any special wiring, I've used a Gravis, which has 4 independant buttons.
If one wants to use 2 different joysticks, I guess you just have to make a cable that directs the good potentiometers values and switches to the good connections onto the WG, knowing that the joystick DB-15 connector on the WG has the following pinout:
Pin Number Function 1,8,9,15 +5V (Pot common) 2 Switch 1 3 Pot 1 4,5,12 Ground (Switch common) 6 Pot 2 7 Sw 2 10 Sw 3 11 Pot 3 13 Pot 4 14 Sw 4(If anybody tries this, please mail me the exact connections you made).
David Nahon, Z.A. Production R & D nahond@ccr.jussieu.fr 64, rue de la Folie Mericourt 75011 Paris - France Phone : 33 (1) 48 06 65 66 FAX : 33 (1) 48 06 48 75
Brent Bates' other notes on installing third party hardware on SGI's:
CD-ROM's,
DAT's,
Hard Disks,
Floppies/Flopticals,
Joysticks,
Magneto Opticals,
Memory,
CDR's (Writeable CD-ROM's),
DLT's (Digital Linear Tape),
Mice
If you have any additions, corrects, or updates to the above information, please email me at: blbates@vigyan.com, thanks.
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Last update: May 14, 2002