266 lines
11 KiB
C
266 lines
11 KiB
C
/*
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* Driver for custom chips display.
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*/
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/* this is a mere collection of data, the registers itself are in the
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custom chip area */
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struct ccfb {
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int disp_width;
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int disp_height;
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int disp_x, disp_y; /* this defines the dimension and
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relative position of the display. */
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int disp_z; /* display depth */
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u_char *fb; /* frame buffer, ie. block in chipmem
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containing bitplane(s) */
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int fb_width;
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int fb_height; /* dimension of the framebuffer. Can
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be larger than the display! */
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int fb_planesize; /* size of each plane, in bytes */
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int fb_x, fb_y; /* offset of the framebuffer relative
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to the display (disp_*) values */
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int fb_z; /* frame buffer depth */
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/* these are added by mykes */
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#if 0
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/* DON'T PUT THOSE HERE! They're fully calculatable from the above
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values, and would introduce data redundancy */
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/*
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* diwstrt, etc. are for direct poke into copper list
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* there should be an ioctl to modify these values
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*/
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u_short diwstrt, diwstop;
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u_short ddfstrt, ddfstop; /* initializers for hardware regs */
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#endif
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/*
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* 32 word color palette... also poked into copper list
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* color 0 is background color
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* color 1 is text color
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* color 2 is intended for cursor color (not working yet)
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* color 3 is intended for selection color (not working yet)
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* color 10 (hex) is sprite pointer color 0 (transparent)
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* color 11 is sprite pointer color 1
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* color 12 is sprite pointer color 2
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* color 13 is sprite pointer color 3
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*/
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u_short col[32]; /* color palette */
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/*
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* beepSample is chipram of 20 bytes/10 words. It is a sine wave
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* sample for creating the beep sound.
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*/
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char *beepSample; /* pointer to beep audio sample */
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/*
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* the beep can have a variable (set by ioctl()) pitch/period.
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* the ioctl() handler routine must stuff any new period into
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* the hardware, too!
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*/
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u_short beepPeriod; /* audio hardware period for sample */
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/*
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* the beep can have a variable volume (set by ioctl()). the
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* ioctl() handler routine must stuff any new volume into the
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* hardware, too!
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*/
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u_short beepVolume; /* audio hardware volume for sample */
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/*
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* At console init time, the copper list is created, and so is the
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* sample buffer (in chip). The init routine starts the audio hardware
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* playing the sample in aud0 and aud1 (stereo L+R), but turns the
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* volume OFF for both channels. When a beep is started, beepTimer
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* is set to beepTime (set beepTime with ioctl() to override default).
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* the vbl handler cc_vbl() counts down beepTimer and when it hits
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* zero, it turns off the volume again. Cheap, but it works and no
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* interrupts are needed :-)
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*/
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u_short beepTimer, beepTime; /* timer and timer value for audio beep */
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/*
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* there is a builtin facility for displaybeep, which is just a screen
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* flash. It is unimplemented, but the fields are defined here. THe
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* idea is for an ioctl() to be used to enable beep and/or display
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* beep (or neither). As with beepTime/beepTimer above, just set
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* dbeepTime with the ioctl() handler.
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*/
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u_short dbeepTimer, dbeepTime; /* timer and timer value for visual beep */
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/*
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* two copper lists are needed, one for even, one for odd frame of
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* the display. There is a nice copper list structure defined
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* in grf_cc.c so the ioctl() function can poke values into the
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* copper lists with ease. Things to poke are colors, horizontal
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* offset (i.e horizontal offset to plane pointers), and screen
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* positioning (diwstrt, etc.).
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*/
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u_short *cop1, *cop2; /* both copperlists */
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/*
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* this is the mouse pointer. It is 4+16*4+4 bytes in CHIP ram.
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* the first 4 bytes are control bytes for the sprite DMA hardware,
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* and are used by the cc_vbl() interrupt handler to move the
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* mouse. The next 16*4 words define the sprite, as in the
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* hardware rkm: plane0 word/plane1 word format for 16 tall.
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* the last 4 bytes are 2 null words, as required for sprite DMA.
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* there is a cheap trick played with these null words! The other
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* 7 sprites point to these NULL words (any ZERO word in chip
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* works, and these are dependable to be NULL). THe intent for
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* the 16*4 words is for an ioctl() call to be usable to alter
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* the sprite pointer image - just copy 16*4 words into the pointer
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* structure in chip ram! There is a handy POINTER struct defined
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* in grf_cc.c.
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*/
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u_short *pointer; /* sprite pointer memory */
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/*
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* mouseH and mouseV are the actual mouse counter register values.
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* you need to keep track of them so you can do deltas from this frame's
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* values to last frame's. lastMouseH and lastMouseV are used for
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* the mouse blanker. ANY movement of the mouse unblanks the mouse
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* (and if the screen is blanked, it is unblanked too). You need
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* to detect counter change and not position change - the mouse could
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* be stuck in a corner and not moving :-)
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*/
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u_char mouseH, mouseV; /* mouse horiz, vert for delta */
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u_char lastMouseH, lastMouseV; /* last values (for blanker) */
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/*
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* mouseX and mouseY are the actual mouse coordinates on the screen
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* (in pixels). There is some incomplete calculations in the source
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* (grf_cc.c) for positioning the mouse - they don't factor in a
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* variable diwstrt, etc. This should be fixed :-) mouseb1 and mouseb2
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* are the mouse button values. !0 means mouse button is down!
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* An ioctl() can either move the mouse position (change mouseX,mouseY)
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* or it can read the mouse position and buttons.
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*/
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short mouseX, mouseY; /* mouse coords */
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u_char mouseb1, mouseb2, mouseb3; /* mouse buttons */
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/*
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* There's two joystick ports on the Amiga. joy0 is the joy port
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* that the mouse is NOT normally plugged into. joy1 is the joy
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* port the mouse IS normally plugged into. There are #defines
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* for the bits for the joysticks below. Note that if a mouse
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* is plugged in, joy1 bits are not joystick bits (garbage :-)
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* There is no facility for the grf_cc.c routine to use a mouse
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* in either port - just the normal mouseport that amigaos uses.
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* this should be enhanced (why not? :-)
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*/
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u_char joy0, joy1; /* joysticks */
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/*
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* The console (grf_cc.c) features a mouseblanker and a screenblanker.
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* If you don't move the mouse for mouseTime 60ths of a second, the
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* mouse will be blanked (sprite DMA turned off). If you move the
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* mouse, the DMA is turned on again (if the screen is blanked, it
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* is turned on also). If you don't hit a key or move the mouse for
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* screenTime 60ths of a second, the screen will blank (raster DMA
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* is turned off and color 0 set to BLACK. If you hit a key or move
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* the mouse, it will be unblanked. The screenBlank/mouseBlank
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* variables are the timers. They are inited with screenTime/mouseTime.
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* the cc_vbl() routine counts these timers down, and when they hit
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* zero, the DMA is turned off. The timers are restarted (full time
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* to count down again) when the mouse is moved or key is hit (key
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* hit for screen blanker only). screenTime and mouseTime are intended
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* for use with ioctl() handler. Thus the timer times can be set by
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* the ioctl handler ;-)
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*/
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u_short screenTime, mouseTime; /* timer counts for screen/mouse blankers */
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u_short screenBlank, mouseBlank; /* timers: screen, mouse blankers */
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/*
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* this below is unfinished, really. instead of two bytes, one of pad,
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* it should be 16 bits of flags (u_short). One of the flags should
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* be the enable flag. I'm too lazy to fix it right now :-) The
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* enable flag is checked for blanking purposes. If the flag is off,
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* the blankers are disabled. Typical use is for an addon graphics
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* card (i.e. custom chipset graphics not in use). The other flags
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* should be used to enable beep, blankers, and so forth.
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*/
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u_char enableFlag, pad; /* flag: true if display enabled */
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};
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/* bits for joy0, joy1 of ccfb */
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#define JOYLEFT (1<<0)
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#define JOYRIGHT (1<<1)
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#define JOYUP (1<<2)
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#define JOYDOWN (1<<3)
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#define JOYBUTTON (1<<4)
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/* mouse/screen blanker default timer times */
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#define DEF_MOUSE (60*5) /* 5 seconds */
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#define DEF_SCREEN (60*5*60) /* 5 minutes */
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/* these are the initial values for changeable parameters: */
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#ifdef BORING_DEFAULTS
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#define DEF_DISP_WIDTH 640
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#define DEF_DISP_HEIGHT 400
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#define DEF_DISP_X 258 /* "" */
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#define DEF_DISP_Y 88 /* hardware preferred values.. */
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#else
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/* these make use of possible overscan, giving you a much larger
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console */
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#define DEF_DISP_WIDTH 704
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#define DEF_DISP_HEIGHT 464
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#define DEF_DISP_X 194
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#define DEF_DISP_Y 44
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#endif
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#define DEF_FB_X 0
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#define DEF_FB_Y 0
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/* mtk: if it were up to me, I'd delete all of the above */
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/* mykes: NOPE! These are enough to regenerate the very hardware
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specific diw* values, so drop those! */
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/* 4 colors for text/cursor, etc., 4 colors for sprite/pointer */
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#define DEF_COL0 0xaaa
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#define DEF_COL1 0x000
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#define DEF_COL2 0x68b
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#define DEF_COL3 0xfff
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#define DEF_COL10 0xf00
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#define DEF_COL11 0x0f0
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#define DEF_COL12 0x00f
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#define DEF_COL13 0x0ff
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/*
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* display mode is a constant for now. You always get hires interlace
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* and two planes. ECS modes may make sense at a later date, as do
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* AGA and beyond. First we need AGA machines with 030's so BSD will
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* run on them. Then we need docs on the hardware regs :-)
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*/
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#if 0
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/* don't do these hardwired. Besides, VIEWMODE changes if number of planes
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changes, no hardwire either */
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#define VIEWMODE 0xa204 /* 2 planes, hires, interlace */
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#define DEF_DIWSTRT 0x2c81
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#define DEF_DIWSTOP 0xf4c1
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#define DEF_DDFSTRT 0x003c
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#define DEF_DDFSTOP 0x00d4
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#endif
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/* default audio values */
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#define DEF_PERIOD 200 /* default period value for audio (beep) */
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#define DEF_VOLUME 64 /* default volume value for audio (beep) */
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#define DEF_ABEEP 10 /* default timer for audio beep */
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/* default display beep values (not implemented yet) */
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#define DEF_DBEEP 10 /* default timer for display beep */
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/* these are currently not changeable easily (would require reallocation
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of display memory and rebuild of copperlists. Do this later perhaps) */
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/* note: mtk, it was easier than you think :-) */
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/* note: mykes, yeah because you left them at 640x400... */
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#define DEF_FB_WIDTH 1024
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#define DEF_FB_HEIGHT 1024
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#define DEF_FB_Z 2
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#define DEF_DISP_Z 1 /* only 1, the curses plane is
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treated as overlay plane */
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/*
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* these macros are used for separating hi and lo word of addresses.
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* the copper list needs them separated - the hardware regs are
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* words :-)
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*/
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#define HIADDR(x) (u_short)((((unsigned long)(x))>>16)&0xffff)
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#define LOADDR(x) (u_short)(((unsigned long)(x))&0xffff)
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/* copper instructions */
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#define COP_MOVE(cl, reg, val) \
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do { (cl)[0] = CUSTOM_OFS(reg); (cl)[1] = val; } while (0)
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#define COP_WAIT(cl, ypos) \
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do { (cl)[0] = ((ypos) << 8) + 1; (cl)[1] = 0xff00; } while (0)
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#define COP_END(cl) \
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do { (cl)[0] = 0xffff; (cl)[1] = 0xfffe; } while (0)
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