grf_ccreg.h revision 1.3
1 /* 2 * Driver for custom chips display. 3 * 4 * $Id: grf_ccreg.h,v 1.3 1993/09/02 18:07:59 mw Exp $ 5 */ 6 7 /* this is a mere collection of data, the registers itself are in the 8 custom chip area */ 9 10 struct ccfb { 11 int disp_width; 12 int disp_height; 13 int disp_x, disp_y; /* this defines the dimension and 14 relative position of the display. */ 15 int disp_z; /* display depth */ 16 17 u_char *fb; /* frame buffer, ie. block in chipmem 18 containing bitplane(s) */ 19 int fb_width; 20 int fb_height; /* dimension of the framebuffer. Can 21 be larger than the display! */ 22 int fb_planesize; /* size of each plane, in bytes */ 23 int fb_x, fb_y; /* offset of the framebuffer relative 24 to the display (disp_*) values */ 25 int fb_z; /* frame buffer depth */ 26 27 /* these are added by mykes */ 28 #if 0 29 /* DON'T PUT THOSE HERE! They're fully calculatable from the above 30 values, and would introduce data redundancy */ 31 32 /* 33 * diwstrt, etc. are for direct poke into copper list 34 * there should be an ioctl to modify these values 35 */ 36 u_short diwstrt, diwstop; 37 u_short ddfstrt, ddfstop; /* initializers for hardware regs */ 38 #endif 39 /* 40 * 32 word color palette... also poked into copper list 41 * color 0 is background color 42 * color 1 is text color 43 * color 2 is intended for cursor color (not working yet) 44 * color 3 is intended for selection color (not working yet) 45 * color 10 (hex) is sprite pointer color 0 (transparent) 46 * color 11 is sprite pointer color 1 47 * color 12 is sprite pointer color 2 48 * color 13 is sprite pointer color 3 49 */ 50 u_short col[32]; /* color palette */ 51 /* 52 * beepSample is chipram of 20 bytes/10 words. It is a sine wave 53 * sample for creating the beep sound. 54 */ 55 char *beepSample; /* pointer to beep audio sample */ 56 /* 57 * the beep can have a variable (set by ioctl()) pitch/period. 58 * the ioctl() handler routine must stuff any new period into 59 * the hardware, too! 60 */ 61 u_short beepPeriod; /* audio hardware period for sample */ 62 /* 63 * the beep can have a variable volume (set by ioctl()). the 64 * ioctl() handler routine must stuff any new volume into the 65 * hardware, too! 66 */ 67 u_short beepVolume; /* audio hardware volume for sample */ 68 /* 69 * At console init time, the copper list is created, and so is the 70 * sample buffer (in chip). The init routine starts the audio hardware 71 * playing the sample in aud0 and aud1 (stereo L+R), but turns the 72 * volume OFF for both channels. When a beep is started, beepTimer 73 * is set to beepTime (set beepTime with ioctl() to override default). 74 * the vbl handler cc_vbl() counts down beepTimer and when it hits 75 * zero, it turns off the volume again. Cheap, but it works and no 76 * interrupts are needed :-) 77 */ 78 u_short beepTimer, beepTime; /* timer and timer value for audio beep */ 79 /* 80 * there is a builtin facility for displaybeep, which is just a screen 81 * flash. It is unimplemented, but the fields are defined here. THe 82 * idea is for an ioctl() to be used to enable beep and/or display 83 * beep (or neither). As with beepTime/beepTimer above, just set 84 * dbeepTime with the ioctl() handler. 85 */ 86 u_short dbeepTimer, dbeepTime; /* timer and timer value for visual beep */ 87 /* 88 * two copper lists are needed, one for even, one for odd frame of 89 * the display. There is a nice copper list structure defined 90 * in grf_cc.c so the ioctl() function can poke values into the 91 * copper lists with ease. Things to poke are colors, horizontal 92 * offset (i.e horizontal offset to plane pointers), and screen 93 * positioning (diwstrt, etc.). 94 */ 95 u_short *cop1, *cop2; /* both copperlists */ 96 /* 97 * this is the mouse pointer. It is 4+16*4+4 bytes in CHIP ram. 98 * the first 4 bytes are control bytes for the sprite DMA hardware, 99 * and are used by the cc_vbl() interrupt handler to move the 100 * mouse. The next 16*4 words define the sprite, as in the 101 * hardware rkm: plane0 word/plane1 word format for 16 tall. 102 * the last 4 bytes are 2 null words, as required for sprite DMA. 103 * there is a cheap trick played with these null words! The other 104 * 7 sprites point to these NULL words (any ZERO word in chip 105 * works, and these are dependable to be NULL). THe intent for 106 * the 16*4 words is for an ioctl() call to be usable to alter 107 * the sprite pointer image - just copy 16*4 words into the pointer 108 * structure in chip ram! There is a handy POINTER struct defined 109 * in grf_cc.c. 110 */ 111 u_short *pointer; /* sprite pointer memory */ 112 /* 113 * mouseH and mouseV are the actual mouse counter register values. 114 * you need to keep track of them so you can do deltas from this frame's 115 * values to last frame's. lastMouseH and lastMouseV are used for 116 * the mouse blanker. ANY movement of the mouse unblanks the mouse 117 * (and if the screen is blanked, it is unblanked too). You need 118 * to detect counter change and not position change - the mouse could 119 * be stuck in a corner and not moving :-) 120 */ 121 u_char mouseH, mouseV; /* mouse horiz, vert for delta */ 122 u_char lastMouseH, lastMouseV; /* last values (for blanker) */ 123 /* 124 * mouseX and mouseY are the actual mouse coordinates on the screen 125 * (in pixels). There is some incomplete calculations in the source 126 * (grf_cc.c) for positioning the mouse - they don't factor in a 127 * variable diwstrt, etc. This should be fixed :-) mouseb1 and mouseb2 128 * are the mouse button values. !0 means mouse button is down! 129 * An ioctl() can either move the mouse position (change mouseX,mouseY) 130 * or it can read the mouse position and buttons. 131 */ 132 short mouseX, mouseY; /* mouse coords */ 133 u_char mouseb1, mouseb2, mouseb3; /* mouse buttons */ 134 /* 135 * There's two joystick ports on the Amiga. joy0 is the joy port 136 * that the mouse is NOT normally plugged into. joy1 is the joy 137 * port the mouse IS normally plugged into. There are #defines 138 * for the bits for the joysticks below. Note that if a mouse 139 * is plugged in, joy1 bits are not joystick bits (garbage :-) 140 * There is no facility for the grf_cc.c routine to use a mouse 141 * in either port - just the normal mouseport that amigaos uses. 142 * this should be enhanced (why not? :-) 143 */ 144 u_char joy0, joy1; /* joysticks */ 145 /* 146 * The console (grf_cc.c) features a mouseblanker and a screenblanker. 147 * If you don't move the mouse for mouseTime 60ths of a second, the 148 * mouse will be blanked (sprite DMA turned off). If you move the 149 * mouse, the DMA is turned on again (if the screen is blanked, it 150 * is turned on also). If you don't hit a key or move the mouse for 151 * screenTime 60ths of a second, the screen will blank (raster DMA 152 * is turned off and color 0 set to BLACK. If you hit a key or move 153 * the mouse, it will be unblanked. The screenBlank/mouseBlank 154 * variables are the timers. They are inited with screenTime/mouseTime. 155 * the cc_vbl() routine counts these timers down, and when they hit 156 * zero, the DMA is turned off. The timers are restarted (full time 157 * to count down again) when the mouse is moved or key is hit (key 158 * hit for screen blanker only). screenTime and mouseTime are intended 159 * for use with ioctl() handler. Thus the timer times can be set by 160 * the ioctl handler ;-) 161 */ 162 u_short screenTime, mouseTime; /* timer counts for screen/mouse blankers */ 163 u_short screenBlank, mouseBlank; /* timers: screen, mouse blankers */ 164 /* 165 * this below is unfinished, really. instead of two bytes, one of pad, 166 * it should be 16 bits of flags (u_short). One of the flags should 167 * be the enable flag. I'm too lazy to fix it right now :-) The 168 * enable flag is checked for blanking purposes. If the flag is off, 169 * the blankers are disabled. Typical use is for an addon graphics 170 * card (i.e. custom chipset graphics not in use). The other flags 171 * should be used to enable beep, blankers, and so forth. 172 */ 173 u_char enableFlag, pad; /* flag: true if display enabled */ 174 }; 175 176 /* bits for joy0, joy1 of ccfb */ 177 #define JOYLEFT (1<<0) 178 #define JOYRIGHT (1<<1) 179 #define JOYUP (1<<2) 180 #define JOYDOWN (1<<3) 181 #define JOYBUTTON (1<<4) 182 183 /* mouse/screen blanker default timer times */ 184 #define DEF_MOUSE (60*5) /* 5 seconds */ 185 #define DEF_SCREEN (60*5*60) /* 5 minutes */ 186 187 /* these are the initial values for changeable parameters: */ 188 #define DEF_DISP_WIDTH 640 189 #define DEF_DISP_HEIGHT 400 190 #define DEF_DISP_X 258 /* "" */ 191 #define DEF_DISP_Y 88 /* hardware preferred values.. */ 192 #define DEF_FB_X 0 193 #define DEF_FB_Y 0 194 /* mtk: if it were up to me, I'd delete all of the above */ 195 /* mykes: NOPE! These are enough to regenerate the very hardware 196 specific diw* values, so drop those! */ 197 198 /* 4 colors for text/cursor, etc., 4 colors for sprite/pointer */ 199 #define DEF_COL0 0xaaa 200 #define DEF_COL1 0x000 201 #define DEF_COL2 0x68b 202 #define DEF_COL3 0xfff 203 #define DEF_COL10 0xf00 204 #define DEF_COL11 0x0f0 205 #define DEF_COL12 0x00f 206 #define DEF_COL13 0x0ff 207 208 /* 209 * display mode is a constant for now. You always get hires interlace 210 * and two planes. ECS modes may make sense at a later date, as do 211 * AGA and beyond. First we need AGA machines with 030's so BSD will 212 * run on them. Then we need docs on the hardware regs :-) 213 */ 214 #if 0 215 /* don't do these hardwired. Besides, VIEWMODE changes if number of planes 216 changes, no hardwire either */ 217 218 #define VIEWMODE 0xa204 /* 2 planes, hires, interlace */ 219 #define DEF_DIWSTRT 0x2c81 220 #define DEF_DIWSTOP 0xf4c1 221 #define DEF_DDFSTRT 0x003c 222 #define DEF_DDFSTOP 0x00d4 223 #endif 224 225 /* default audio values */ 226 #define DEF_PERIOD 200 /* default period value for audio (beep) */ 227 #define DEF_VOLUME 64 /* default volume value for audio (beep) */ 228 #define DEF_ABEEP 10 /* default timer for audio beep */ 229 /* default display beep values (not implemented yet) */ 230 #define DEF_DBEEP 10 /* default timer for display beep */ 231 232 /* these are currently not changeable easily (would require reallocation 233 of display memory and rebuild of copperlists. Do this later perhaps) */ 234 235 /* note: mtk, it was easier than you think :-) */ 236 /* note: mykes, yeah because you left them at 640x400... */ 237 #define DEF_FB_WIDTH 1024 238 #define DEF_FB_HEIGHT 1024 239 #define DEF_FB_Z 2 240 #define DEF_DISP_Z 1 /* only 1, the curses plane is 241 treated as overlay plane */ 242 243 /* 244 * these macros are used for separating hi and lo word of addresses. 245 * the copper list needs them separated - the hardware regs are 246 * words :-) 247 */ 248 #define HIADDR(x) (u_short)((((unsigned long)(x))>>16)&0xffff) 249 #define LOADDR(x) (u_short)(((unsigned long)(x))&0xffff) 250 251 /* copper instructions */ 252 #define COP_MOVE(cl, reg, val) \ 253 do { (cl)[0] = CUSTOM_OFS(reg); (cl)[1] = val; } while (0) 254 #define COP_WAIT(cl, ypos) \ 255 do { (cl)[0] = ((ypos) << 8) + 1; (cl)[1] = 0xff00; } while (0) 256 #define COP_END(cl) \ 257 do { (cl)[0] = 0xffff; (cl)[1] = 0xfffe; } while (0) 258 259
Indexes created Tue Oct 07 21:09:53 GMT 2025