www.nico.schottelius.org/software/gpm/browse_source/gpm-1.20.5/patches/todo/suvil-gpm-patch

--- ../original-gpm-1.19.2/mice.c	Tue Mar  7 15:10:00 2000
+++ mice.c	Wed Jun 14 12:36:42 2000
@@ -305,7 +305,6 @@
   return 0;
 }
 
-
 /* Thu Jan 28 20:54:47 MET 1999 hof@hof-berlin.de SummaSketch reportformat */
 static int R_summa(Gpm_Event *state, int fd)
 {
@@ -332,7 +331,55 @@
   return write(fd,buffer,5);
 }
 
+/* Suvil Penbrush Professional tablet support absolute mode*/
+/* Summagraphics MM-Series format*/
+/* (Grzegorz Adam Hankiewicz) gradha@iname.com Wed Jun 14 11:32:27 CEST 2000 */
+int suvilmaxx,suvilmaxy;
+static int M_suvil (Gpm_Event *state, unsigned char *data)
+{
+    int x, y;
+  
+    x = data[2] * 128 + data[1];
+    y = data[4] * 128 + data[3];
+  
+    if (x >= suvilmaxx) x = suvilmaxx;
+    if (y >= suvilmaxy) y = suvilmaxy;
+  
+    state->x = x * win.ws_col / suvilmaxx;
+    state->y = 1 + y * win.ws_row / suvilmaxy;
+  
+    realposx = x * REALPOS_MAX / suvilmaxx;
+    realposy = y * REALPOS_MAX / suvilmaxy;
+  
+    state->buttons =
+        !!(data[0]&1) * GPM_B_LEFT +
+        !!(data[0]&2) * GPM_B_RIGHT +
+        !!(data[0]&4) * GPM_B_MIDDLE;
 
+    return 0;
+}
+
+/* Wed Jun 14 11:32:27 CEST 2000 gradha@iname.com */
+static int R_suvil(Gpm_Event *state, int fd)
+{
+   signed char buffer[5];
+   static int x, y;
+
+   buffer[0] = 0x98 + ((state->buttons & GPM_B_LEFT) > 0 ? 1:0) +
+                      ((state->buttons & GPM_B_MIDDLE) > 0 ? 2:0) +
+                      ((state->buttons & GPM_B_RIGHT) > 0 ? 3:0);
+
+   x = realposx * suvilmaxx / REALPOS_MAX ; y = realposy;
+
+   buffer[1] = x & 0x7f;
+   buffer[2] = (x >> 7) & 0x7f;
+   buffer[3] = y & 0x7f;
+   buffer[4] = (y >> 7) & 0x7f;
+
+
+
+   return write (fd, buffer, 5);
+}
 
 /* 'Genitizer' (kw@dtek.chalmers.se 11/12/97) */
 static int M_geni(Gpm_Event *state,  unsigned char *data)
@@ -1768,6 +1815,57 @@
   return type;
 }
 
+static Gpm_Type *I_suvil(int fd, unsigned short flags,
+			 struct Gpm_Type *type, int argc, char **argv) 
+{
+    char byte;
+    char config[5];
+ 
+    #define SUVIL_SP66   0x06
+  
+    write (fd, 0, 1); /* Reset */
+    usleep (400000); /* wait */
+    setspeed (fd, 1200, 1200, 1, B1200|CS7|CREAD|CLOCAL|HUPCL|PARENB|PARODD);
+    write (fd, 0, 1); /* Reset */
+    usleep (400000); /* wait */
+    
+    /* First try setting tablet to tablet mode */
+    write (fd, "X", 1);
+    usleep (3000);
+    
+    /* Now set stablet speed to 9600 */
+    setspeed (fd, 1200, 9600, 1, B9600|CS8|CREAD|CLOCAL|HUPCL|PARENB|PARODD);
+
+    /* Set tablet to not report coordinates and ask model */
+    write (fd, "D?", 2);
+    usleep (3000);
+    read (fd, &byte, 1);
+  
+    switch (byte)
+    {
+        case 'S':
+        case SUVIL_SP66:
+            byte = SUVIL_SP66;
+            /* Set upper left origin and read maximum resolution range */
+            write (fd, "ba", 2);
+            read (fd, config, 5);
+   
+            suvilmaxx = config[2]*128+config[1];
+            suvilmaxy = config[4]*128+config[3];
+   
+            /* Finally set tablet to report absolute coordinates in stream mode */
+            write (fd, "I!@", 3);
+            break;
+            
+        default:
+            /* Don't support this model */
+            return NULL;
+            break;
+    }
+
+    return type;
+}
+
 static Gpm_Type *I_mtouch(int fd, unsigned short flags,
 			  struct Gpm_Type *type, int argc, char **argv)
 {
@@ -2043,6 +2141,9 @@
            "wizardpad", M_wp, I_wp, STD_FLG,
                                 {0xFA, 0x42, 0x00, 0x00}, 10, 1, 0, 1, 0},
 
+  {"suvil", "Suvil Penbrush Professional (sp-66)", "", M_suvil, I_suvil, STD_FLG,
+                                {0x80, 0x80, 0x00, 0x00}, 5, 1, 0, 1, R_suvil},
+
   {"",     "",
            "", NULL, NULL, 0,
                                 {0x00, 0x00, 0x00, 0x00}, 0, 0, 0, 0, 0}
@@ -2068,7 +2169,7 @@
 }
 
 
-
+
 /*
  * Use 4 as indent-level. It used to be 2, but new stuff will be inserted
  * using 4.