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nuclear@1
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1 /* TODO: try NOT using the v8086 interrupts to avoid the overhead */
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nuclear@1
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2 #include "mouse.h"
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3 #include "inttypes.h"
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4 #include "dpmi.h"
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5
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6 #define INTR 0x33
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7
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8 #define QUERY 0
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9 #define SHOW 1
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10 #define HIDE 2
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11 #define READ 3
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12 #define WRITE 4
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13
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14 #define XLIM 7
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15 #define YLIM 8
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16
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17 int have_mouse(void)
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18 {
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19 struct dpmi_real_regs regs;
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20 memset(®s, 0, sizeof regs);
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21 regs.eax = QUERY;
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22 dpmi_real_int(INTR, ®s);
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23 return regs.eax & 0xffff;
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24 }
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25
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26 void show_mouse(int show)
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27 {
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28 struct dpmi_real_regs regs;
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29 memset(®s, 0, sizeof regs);
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30 regs.eax = show ? SHOW : HIDE;
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31 dpmi_real_int(INTR, ®s);
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32 }
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33
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34 int read_mouse(int *xp, int *yp)
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35 {
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36 struct dpmi_real_regs regs;
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37 memset(®s, 0, sizeof regs);
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38
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39 regs.eax = READ;
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40 dpmi_real_int(INTR, ®s);
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41
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42 if(xp) *xp = regs.ecx & 0xffff;
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43 if(yp) *yp = regs.edx & 0xffff;
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44 return regs.ebx & 0xffff;
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45 }
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46
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47 void set_mouse(int x, int y)
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48 {
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49 struct dpmi_real_regs regs;
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50 memset(®s, 0, sizeof regs);
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51
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52 regs.eax = WRITE;
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53 regs.ecx = x;
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54 regs.edx = y;
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55 dpmi_real_int(INTR, ®s);
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56 }
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57
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58 void set_mouse_limits(int xmin, int ymin, int xmax, int ymax)
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59 {
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60 struct dpmi_real_regs regs;
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61 memset(®s, 0, sizeof regs);
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62 regs.eax = XLIM;
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63 regs.ecx = xmin;
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64 regs.edx = xmax;
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65 dpmi_real_int(INTR, ®s);
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66
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67 memset(®s, 0, sizeof regs);
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68 regs.eax = YLIM;
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69 regs.ecx = ymin;
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70 regs.edx = ymax;
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71 dpmi_real_int(INTR, ®s);
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72 }
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