diff -C 2 -P orig/freq.h source/freq.h
*** orig/freq.h	Sun Mar 10 13:42:26 1996
--- source/freq.h	Sat Jun  7 23:55:57 1997
***************
*** 1,3 ****
! #define VERSION "v.5.1"
  #define COPYRIGHT "1996"
  
--- 1,3 ----
! #define VERSION "v.5.1.o2"
  #define COPYRIGHT "1996"
  
***************
*** 26,30 ****
  
  #ifdef DEBUG_OUTPUT
!  #define DOUT(string) puts(string)
  #else
   #define DOUT(string) {}
--- 26,30 ----
  
  #ifdef DEBUG_OUTPUT
!  #define DOUT(string) fprintf(stderr, "%s\n", string)
  #else
   #define DOUT(string) {}
***************
*** 136,139 ****
--- 136,142 ----
    #define SC_LINUX 1
   #endif
+  #ifdef OSCOPE
+   #define SC_OSCOPE 2
+  #endif
  #else /* UNIX */
   #define SC_SB8     0
***************
*** 152,155 ****
--- 155,159 ----
  #define SC_LINUX_NAME "LINUX"
  #define SC_MULAW_NAME "MULAW"
+ #define SC_OSCOPE_NAME "OSCOPE"
  
  /* Default soundcard */
***************
*** 225,227 ****
  #endif
  
! 
--- 229,234 ----
  #endif
  
! /* Function in SC_OSCOPE.C */
! #ifdef SC_OSCOPE
!   void init_oscope_sc(void);
! #endif
diff -C 2 -P orig/freq.c source/freq.c
*** orig/freq.c	Sun Mar 10 13:42:24 1996
--- source/freq.c	Sat Jun  7 23:55:57 1997
***************
*** 116,119 ****
--- 116,120 ----
  int barmode=1;          /* Flag for bar display or dot display */
  int done=0;             /* Flag indicating program should exit*/
+ FILE *where;			/* where to send final messages */
  
  int main(int argc,char *argv[],char *environ[])
***************
*** 138,143 ****
     else
     {
!       strncpy(ini_file,"freq.ini",sizeof(ini_file));
!       first=1;
     }
  
--- 139,149 ----
     else
     {
! #ifdef SC_OSCOPE
!      if (strstr(argv[0], "ofreq"))
!        strncpy(ini_file, INIPATH, sizeof(ini_file));
!      else
! #endif
!        strncpy(ini_file,"freq.ini",sizeof(ini_file));
!      first=1;
     }
  
***************
*** 827,831 ****
     cleanup_graphics();
  
!    printf("You have been using Freq " VERSION);
  #ifdef SC_PAS16
     if(Soundcard==SC_PAS16) printf(" in ProAudio Spectrum 16-bit mode.");
--- 833,842 ----
     cleanup_graphics();
  
!    where = stdout;
! #ifdef SC_OSCOPE
!    if(Soundcard==SC_OSCOPE)
!      where = stderr;
! #endif
!    fprintf(where, "You have been using Freq " VERSION);
  #ifdef SC_PAS16
     if(Soundcard==SC_PAS16) printf(" in ProAudio Spectrum 16-bit mode.");
***************
*** 846,850 ****
     if(Soundcard==SC_MULAW) printf(" in 8-bit mu-law audio driver mode.");
  #endif
!    puts("\nCopyright (C) " COPYRIGHT " Philip VanBaren");
     return(0);
  }
--- 857,864 ----
     if(Soundcard==SC_MULAW) printf(" in 8-bit mu-law audio driver mode.");
  #endif
! #ifdef SC_OSCOPE
!    if(Soundcard==SC_OSCOPE) fprintf(where, " in 8-bit xoscope pipe mode.");
! #endif
!    fprintf(where, "\nCopyright (C) " COPYRIGHT " Philip VanBaren\n");
     return(0);
  }
diff -C 2 -P orig/makefile.srgp_linux source/makefile.srgp_linux
*** orig/makefile.srgp_linux	Sun Mar 10 13:42:26 1996
--- source/makefile.srgp_linux	Sat Jun  7 23:55:57 1997
***************
*** 38,42 ****
  INCLUDE=
  
! DEFINES=-DUNIX -DLINUX_MIXER -DSRGP
  
  # order is important
--- 38,42 ----
  INCLUDE=
  
! DEFINES=-DUNIX -DLINUX_MIXER -DSRGP -DOSCOPE  '-DINIPATH="/usr/local/lib/oscope/ofreq.ini"'
  
  # order is important
***************
*** 45,49 ****
  CC=gcc $(DEBUG) $(OPT) $(DEFINES) $(INCLUDE) $(FLAGS) 
  
! FREQOBJS=freq.o procinp.o setupsub.o realfft.o passdata.o sc_linux.o sc_mulaw.o gr_srgp.o
  FREQSRCS=$(FREQOBJS:.o=.c)
  
--- 45,49 ----
  CC=gcc $(DEBUG) $(OPT) $(DEFINES) $(INCLUDE) $(FLAGS) 
  
! FREQOBJS=freq.o procinp.o setupsub.o realfft.o passdata.o sc_oscope.o sc_linux.o sc_mulaw.o gr_srgp.o
  FREQSRCS=$(FREQOBJS:.o=.c)
  
diff -C 2 -P orig/procinp.c source/procinp.c
*** orig/procinp.c	Sun Mar 10 13:42:26 1996
--- source/procinp.c	Mon Jun  2 18:00:39 1997
***************
*** 554,558 ****
        else if(c=='R' || c=='r') /* Change the sampling rate */
        {
! 	 char in[6];
  	 draw_bar(WINDOW_LEFT-5,MGY-1,WINDOW_RIGHT+5,MGY+_font_height,0);
  	 draw_text_left(MGX-80,MGY,"Sampling rate: ");
--- 554,558 ----
        else if(c=='R' || c=='r') /* Change the sampling rate */
        {
! 	 char in[9];
  	 draw_bar(WINDOW_LEFT-5,MGY-1,WINDOW_RIGHT+5,MGY+_font_height,0);
  	 draw_text_left(MGX-80,MGY,"Sampling rate: ");
***************
*** 565,570 ****
  
  	    SampleRate=atol(in);
! 	    if(SampleRate<5000L) SampleRate=5000L;
! 	    if(SampleRate>88200L) SampleRate=88200L;
  
  	    reset_soundcard();
--- 565,570 ----
  
  	    SampleRate=atol(in);
! 	    if(SampleRate<1000L) SampleRate=1000L;
! 	    if(SampleRate>20000000L) SampleRate=20000000L;
  
  	    reset_soundcard();
diff -C 2 -P orig/sc_oscope.c source/sc_oscope.c
*** orig/sc_oscope.c	Wed Dec 31 16:00:00 1969
--- source/sc_oscope.c	Sat Jun  7 23:58:48 1997
***************
*** 0 ****
--- 1,127 ----
+ /*
+  *  Routines for sampling from stdin/stdout pipe to xoscope
+  *
+  *  Copyright (C) 1996  Tim Witham <twitham@pcocd2.intel.com>
+  *
+  *  This program is free software; you can redistribute it and/or modify
+  *  it under the terms of the GNU General Public License as published by
+  *  the Free Software Foundation; either version 2 of the License, or
+  *  (at your option) any later version.
+  *
+  *  This program is distributed in the hope that it will be useful,
+  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  *  GNU General Public License for more details.
+  *
+  *  You should have received a copy of the GNU General Public License
+  *  along with this program; if not, write to the Free Software
+  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+  */
+ 
+ #include "freq.h"
+ 
+ #ifdef SC_OSCOPE
+ 
+ #include <stdio.h>
+ #include <stdlib.h>
+ #include <unistd.h>
+ #include <fcntl.h>
+ #include <sys/soundcard.h>
+ #include <sys/ioctl.h>
+ #include "extern.h"
+ 
+ /* Function prototypes */
+ void reset_oscope_sc(void);
+ void halt_oscope_sc(void);
+ void cleanup_oscope_sc(void);
+ void recordblock_oscope_sc(void *buffer);
+ void set_mixer_oscope_sc(int mix,int level);
+ 
+ int channel_oscope_sc=0;	/* input channel, changed by "mixing" */
+ 
+ void init_oscope_sc(void)
+ {
+    DOUT("Setting up soundcard pointers");
+    reset_soundcard=reset_oscope_sc;
+    halt_soundcard=halt_oscope_sc;
+    cleanup_soundcard=cleanup_oscope_sc;
+    recordblock=recordblock_oscope_sc;
+    set_mixer=set_mixer_oscope_sc;
+    mixers=1;
+    mic_level=1;
+ 
+    /* If the audio device (sample depth) is undefined, define the default */
+    if(audio_device==NULL)
+       audio_device="640";
+ 
+    DOUT("Setting the DSP device bits per sample to 8");
+    sample_size=8;
+ }
+ 
+ void reset_oscope_sc(void)
+ {
+    int i;
+ 
+    DOUT("Initializing the buffers");
+    /* Reset the buffer pointers */
+    queue_buffer=0;     /* Pointer to next buffer to be queued */
+    record_buffer=0;    /* Pointer to next buffer to be filled */
+    process_buffer=0;   /* Pointer to next buffer to be FFTed  */
+ 
+    for(i=0;i<BUFFERS;i++)
+       flag[i]=0;
+    /*
+     *  This function starts the DMA process.
+     */
+    recordblock_oscope_sc(buffer[queue_buffer]);
+    if(++queue_buffer>=BUFFERS)
+       queue_buffer=0;
+ }
+ 
+ 
+ void halt_oscope_sc(void) {}
+ 
+ void cleanup_oscope_sc(void) {}
+ 
+ void recordblock_oscope_sc(void *buffer)
+ {
+   static int i, j, samples_per_screen;
+   static unsigned char FAR *in, *inmax; /* signal I/O buffers and pointers */
+   static short buff, out=0;
+ 
+   in = buffer;
+   inmax = buffer + fftlen;
+   samples_per_screen = atoi(audio_device);
+   for (j=0 ; j<samples_per_screen ; j++) {
+     if ((i = read(0, &buff, sizeof(short))) != sizeof(short))
+       exit(i);
+     if (!channel_oscope_sc)	/* grab channel 1 ... */
+       *(in++) = buff * 100 / 125 + 128;
+     if ((i = read(0, &buff, sizeof(short))) != sizeof(short))
+       exit(i);
+     if (channel_oscope_sc)	/* ... or channel 2 */
+       *(in++) = buff * 100 / 125 + 128;
+     if (in >= inmax) {
+       in = inmax;
+       /* Toggle the buffer-filled flag */
+       if(!flag[record_buffer]) {
+ 	flag[record_buffer]=1;
+ 	if (++record_buffer>=BUFFERS)
+ 	  record_buffer=0;
+       }
+     }
+     if ((i = write(1, &out, sizeof(short))) != sizeof(short))
+       exit(i);
+   }
+ }
+ 
+ /* "mixing" in this context means toggle channel 1 or 2 as the input */
+ void set_mixer_oscope_sc(int mix,int level)
+ {
+    DOUT("Setting the oscope input channel");
+    channel_oscope_sc = !channel_oscope_sc;
+    mic_level=channel_oscope_sc + 1;
+    update_header();
+ }
+ 
+ #endif /* SC_OSCOPE */
diff -C 2 -P orig/setupsub.c source/setupsub.c
*** orig/setupsub.c	Sun Mar 10 13:42:26 1996
--- source/setupsub.c	Sat Jun  7 23:55:58 1997
***************
*** 362,367 ****
--- 362,372 ----
                   puts("-Cnumber selects the soundcard (0=SB, 1=PAS, 2=VESA, 3=SB16).");
                #else /* UNIX */
+               #ifdef SC_OSCOPE
+                  puts("-Cnumber selects the soundcard (0=AU, 1=DSP 2=OSCOPE).");
+ 		 puts("-Ddevice selects the DSP device, or # of samples per screen width w/-C2.");
+               #else /* SC_OSCOPE */
                   puts("-Cnumber selects the soundcard (0=AU, 1=DSP).");
  		 puts("-Ddevice selects the DSP device.");
+               #endif /* SC_OSCOPE */
  		 puts("-Xdevice selects the Mixer device.");
                #endif /* UNIX */
***************
*** 438,443 ****
     if(ys<0.01) ys=0.01;
  
!    if(SampleRate>88200L) SampleRate=88200L;
!    if(SampleRate<5000L) SampleRate=5000L;
  
     if(fftlen<8) fftlen=8;
--- 443,448 ----
     if(ys<0.01) ys=0.01;
  
!    if(SampleRate>20000000L) SampleRate=20000000L;
!    if(SampleRate<1000L) SampleRate=1000L;
  
     if(fftlen<8) fftlen=8;
***************
*** 479,482 ****
--- 484,491 ----
        init_mulaw_sc();
  #endif
+ #ifdef SC_OSCOPE
+    if(Soundcard==SC_OSCOPE)
+       init_oscope_sc();
+ #endif
     if(reset_soundcard==NULL)
     {
***************
*** 501,504 ****
--- 510,516 ----
           printf("  %s (%d)\n",SC_LINUX_NAME,SC_LINUX);
        #endif
+       #ifdef SC_OSCOPE
+          printf("  %s (%d)\n",SC_OSCOPE_NAME,SC_OSCOPE);
+       #endif
        exit(1);
     }
***************
*** 548,551 ****
--- 560,567 ----
           return SC_LINUX;
     #endif
+    #ifdef SC_OSCOPE
+       if(strncmp(name,SC_OSCOPE_NAME,strlen(SC_OSCOPE_NAME))==0)
+          return SC_OSCOPE;
+    #endif
     return(-1); /* If none match, return failure */
  }
***************
*** 1120,1125 ****
     if(mixers)
     {
!       sprintf(ach,"Mic:%3d  Ext:%3d  CD:%3d",mic_level,ext_level,int_level);
!       draw_text_left(LVX,LVY,ach);
     }
  }
--- 1136,1146 ----
     if(mixers)
     {
! #ifdef SC_OSCOPE
!      if (Soundcard==SC_OSCOPE)
!        sprintf(ach,"   xoscope channel %d   ",mic_level);
!      else
! #endif
!        sprintf(ach,"Mic:%3d  Ext:%3d  CD:%3d",mic_level,ext_level,int_level);
!      draw_text_left(LVX,LVY,ach);
     }
  }
***************
*** 1160,1164 ****
           draw_text_left(36,74,"'C' Toggle B&W/color display");
           draw_text_left(340,62,"'V' Refresh display");
!          draw_text_left(300,74,"(),[],{} Adjust mic,ext,CD input level");
        }
        else
--- 1181,1190 ----
           draw_text_left(36,74,"'C' Toggle B&W/color display");
           draw_text_left(340,62,"'V' Refresh display");
! #ifdef SC_OSCOPE
! 	 if (Soundcard==SC_OSCOPE)
! 	   draw_text_left(300,74,"(),[],{} Toggle xoscope input channel ");
! 	 else
! #endif
! 	   draw_text_left(300,74,"(),[],{} Adjust mic,ext,CD input level");
        }
        else