mirror of
https://github.com/holub/mame
synced 2025-05-24 23:05:32 +03:00
Refactoring from MESS, nw
This commit is contained in:
Angelo Salese
parent
eda5eaeb30
commit
53a5fdf04a
@ -23,6 +23,8 @@
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- add emulated mc6845 hook-up
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- fix resolution change
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- fix video update.
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- fix partial updates (The Incredible Machine)
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- check doublescan condition (Robotron)
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- (and many more ...)
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ROM declarations:
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@ -45,80 +47,6 @@
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***************************************************************************/
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static pc_video_update_proc (*pc_choosevideomode)(running_machine &machine, int *width, int *height);
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static int pc_current_height;
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static int pc_current_width;
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/***************************************************************************
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Static declarations
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***************************************************************************/
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#define LOG_ACCESSES 0
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#define LOG_REGISTERS 0
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static PALETTE_INIT( vga );
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static VIDEO_START( vga );
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static VIDEO_RESET( vga );
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static pc_video_update_proc pc_vga_choosevideomode(running_machine &machine, int *width, int *height);
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/***************************************************************************
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MachineDriver stuff
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***************************************************************************/
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void pc_video_start(running_machine &machine, pc_video_update_proc (*choosevideomode)(running_machine &machine, int *width, int *height))
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{
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pc_choosevideomode = choosevideomode;
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pc_current_height = -1;
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pc_current_width = -1;
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}
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SCREEN_UPDATE_IND16( pc_video )
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{
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UINT32 rc = 0;
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int w = 0, h = 0;
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pc_video_update_proc video_update = pc_choosevideomode(screen.machine(), &w, &h);
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if (video_update)
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{
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if ((pc_current_width != w) || (pc_current_height != h))
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{
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int width = screen.width();
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int height = screen.height();
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pc_current_width = w;
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pc_current_height = h;
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if (pc_current_width > width)
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pc_current_width = width;
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if (pc_current_height > height)
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pc_current_height = height;
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if ((pc_current_width > 100) && (pc_current_height > 100))
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screen.set_visible_area(0, pc_current_width-1, 0, pc_current_height-1);
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bitmap.fill(0, cliprect);
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}
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video_update(bitmap);
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}
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return rc;
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}
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/***************************************************************************/
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static PALETTE_INIT( vga )
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{
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int i;
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for (i = 0; i < 0x100; i++)
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palette_set_color_rgb(machine, i, 0, 0, 0);
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}
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static UINT8 color_bitplane_to_packed[4/*plane*/][8/*pixel*/][256];
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static struct
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@ -128,7 +56,7 @@ static struct
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UINT8 *memory;
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UINT8 *fontdirty;
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UINT16 pens[16]; /* the current 16 pens */
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UINT32 pens[16]; /* the current 16 pens */
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UINT8 miscellaneous_output;
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UINT8 feature_control;
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@ -229,6 +157,321 @@ static struct
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#define FONT1 ( ((vga.sequencer.data[3]&0x3) |((vga.sequencer.data[3]&0x10)<<2))*0x2000 )
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#define FONT2 ( (((vga.sequencer.data[3]&0xc)>>2)|((vga.sequencer.data[3]&0x20)<<3))*0x2000 )
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static int pc_current_height;
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static int pc_current_width;
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/***************************************************************************
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Static declarations
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***************************************************************************/
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#define LOG_ACCESSES 0
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#define LOG_REGISTERS 0
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static PALETTE_INIT( vga );
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static VIDEO_START( vga );
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static VIDEO_RESET( vga );
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/***************************************************************************
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MachineDriver stuff
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***************************************************************************/
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void pc_video_start(running_machine &machine)
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{
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// pc_choosevideomode = choosevideomode;
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pc_current_height = -1;
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pc_current_width = -1;
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}
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static void vga_vh_text(running_machine &machine, bitmap_rgb32 &bitmap, const rectangle &cliprect)
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{
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UINT8 ch, attr;
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UINT8 bits;
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UINT8 *font;
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UINT32 *bitmapline;
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int width=CHAR_WIDTH, height=CRTC_CHAR_HEIGHT;
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int pos, line, column, mask, w, h, addr;
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pen_t pen;
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if (CRTC_CURSOR_MODE!=CRTC_CURSOR_OFF)
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{
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if (++vga.cursor.time>=0x10)
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{
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vga.cursor.visible^=1;
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vga.cursor.time=0;
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}
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}
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for (addr = TEXT_START_ADDRESS, line = -CRTC_SKEW; line < TEXT_LINES;
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line += height, addr += TEXT_LINE_LENGTH)
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{
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for (pos = addr, column=0; column<TEXT_COLUMNS; column++, pos++)
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{
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ch = vga.memory[(pos<<2) + 0];
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attr = vga.memory[(pos<<2) + 1];
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font = vga.memory+2+(ch<<(5+2))+FONT1;
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for (h = MAX(-line, 0); (h < height) && (line+h < MIN(TEXT_LINES, bitmap.height())); h++)
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{
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bitmapline = &bitmap.pix32(line+h);
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bits = font[h<<2];
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assert(bitmapline);
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for (mask=0x80, w=0; (w<width)&&(w<8); w++, mask>>=1)
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{
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if (bits&mask)
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pen = vga.pens[attr & 0x0f];
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else
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pen = vga.pens[attr >> 4];
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bitmapline[column*width+w] = pen;
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}
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if (w<width)
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{
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/* 9 column */
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if (TEXT_COPY_9COLUMN(ch)&&(bits&1))
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pen = vga.pens[attr & 0x0f];
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else
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pen = vga.pens[attr >> 4];
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bitmapline[column*width+w] = pen;
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}
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}
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if ((CRTC_CURSOR_MODE!=CRTC_CURSOR_OFF)
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&&vga.cursor.visible&&(pos==CRTC_CURSOR_POS))
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{
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for (h=CRTC_CURSOR_TOP;
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(h<=CRTC_CURSOR_BOTTOM)&&(h<height)&&(line+h<TEXT_LINES);
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h++)
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{
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bitmap.plot_box(column*width, line+h, width, 1, vga.pens[attr&0xf]);
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}
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}
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}
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}
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}
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static void vga_vh_ega(running_machine &machine, bitmap_rgb32 &bitmap, const rectangle &cliprect)
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{
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int pos, line, column, c, addr, i;
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int height = CRTC_CHAR_HEIGHT;
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UINT32 *bitmapline;
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UINT32 *newbitmapline;
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pen_t pen;
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for (addr=EGA_START_ADDRESS, pos=0, line=0; line<LINES * (DOUBLESCAN+1);
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line += height, addr=(addr+EGA_LINE_LENGTH)&0x3ffff)
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{
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bitmapline = &bitmap.pix32(line >> DOUBLESCAN);
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for (pos=addr, c=0, column=0; column<EGA_COLUMNS; column++, c+=8, pos=(pos+4)&0x3ffff)
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{
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int data[4];
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data[0]=vga.memory[pos];
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data[1]=vga.memory[pos+1]<<1;
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data[2]=vga.memory[pos+2]<<2;
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data[3]=vga.memory[pos+3]<<3;
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for (i = 7; i >= 0; i--)
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{
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pen = vga.pens[(data[0]&1) | (data[1]&2) | (data[2]&4) | (data[3]&8)];
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bitmapline[c+i] = pen;
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data[0]>>=1;
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data[1]>>=1;
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data[2]>>=1;
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data[3]>>=1;
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}
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}
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for (i = 1; i < height; i++)
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{
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if (line + i >= LINES)
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break;
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newbitmapline = &bitmap.pix32(line+i);
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memcpy(newbitmapline, bitmapline, EGA_COLUMNS * 8 * sizeof(UINT16));
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}
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}
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}
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static void vga_vh_vga(running_machine &machine, bitmap_rgb32 &bitmap, const rectangle &cliprect)
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{
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int pos, line, column, c, addr, curr_addr;
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UINT32 *bitmapline;
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UINT16 mask_comp;
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/* line compare is screen sensitive */
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mask_comp = 0xff | (LINES & 0x300);
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curr_addr = 0;
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if(vga.sequencer.data[4] & 0x08)
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{
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for (addr = VGA_START_ADDRESS, line=0; line<LINES; line++, addr+=VGA_LINE_LENGTH, curr_addr+=VGA_LINE_LENGTH)
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{
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if(line < (vga.line_compare & mask_comp))
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curr_addr = addr;
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if(line == (vga.line_compare & mask_comp))
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curr_addr = 0;
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bitmapline = &bitmap.pix32(line);
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addr %= vga.svga_intf.vram_size;
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for (pos=curr_addr, c=0, column=0; column<VGA_COLUMNS; column++, c+=8, pos+=0x20)
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{
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if(pos + 0x20 > vga.svga_intf.vram_size)
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return;
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bitmapline[c+0] = machine.pens[vga.memory[pos+0]];
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bitmapline[c+1] = machine.pens[vga.memory[pos+1]];
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bitmapline[c+2] = machine.pens[vga.memory[pos+2]];
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bitmapline[c+3] = machine.pens[vga.memory[pos+3]];
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bitmapline[c+4] = machine.pens[vga.memory[pos+0x10]];
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bitmapline[c+5] = machine.pens[vga.memory[pos+0x11]];
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bitmapline[c+6] = machine.pens[vga.memory[pos+0x12]];
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bitmapline[c+7] = machine.pens[vga.memory[pos+0x13]];
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}
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}
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}
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else
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{
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for (addr = VGA_START_ADDRESS, line=0; line<LINES; line++, addr+=VGA_LINE_LENGTH/4, curr_addr+=VGA_LINE_LENGTH/4)
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{
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if(line < (vga.line_compare & mask_comp))
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curr_addr = addr;
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if(line == (vga.line_compare & mask_comp))
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curr_addr = 0;
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bitmapline = &bitmap.pix32(line);
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addr %= vga.svga_intf.vram_size;
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for (pos=curr_addr, c=0, column=0; column<VGA_COLUMNS; column++, c+=8, pos+=0x08)
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{
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if(pos + 0x08 > vga.svga_intf.vram_size)
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return;
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bitmapline[c+0] = machine.pens[vga.memory[pos+0]];
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bitmapline[c+1] = machine.pens[vga.memory[pos+1]];
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bitmapline[c+2] = machine.pens[vga.memory[pos+2]];
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bitmapline[c+3] = machine.pens[vga.memory[pos+3]];
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bitmapline[c+4] = machine.pens[vga.memory[pos+4]];
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bitmapline[c+5] = machine.pens[vga.memory[pos+5]];
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bitmapline[c+6] = machine.pens[vga.memory[pos+6]];
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bitmapline[c+7] = machine.pens[vga.memory[pos+7]];
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}
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}
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}
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}
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static UINT8 pc_vga_choosevideomode(running_machine &machine, int *width, int *height)
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{
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int i;
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if (CRTC_ON)
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{
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if (vga.dac.dirty)
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{
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for (i=0; i<256;i++)
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{
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palette_set_color_rgb(machine, i,(vga.dac.color[i].red & 0x3f) << 2,
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(vga.dac.color[i].green & 0x3f) << 2,
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(vga.dac.color[i].blue & 0x3f) << 2);
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}
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vga.dac.dirty = 0;
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}
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if (vga.attribute.data[0x10] & 0x80)
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{
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for (i=0; i<16;i++)
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{
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vga.pens[i] = machine.pens[(vga.attribute.data[i]&0x0f)
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|((vga.attribute.data[0x14]&0xf)<<4)];
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}
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}
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else
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{
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for (i=0; i<16;i++)
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{
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vga.pens[i]=machine.pens[(vga.attribute.data[i]&0x3f)
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|((vga.attribute.data[0x14]&0xc)<<4)];
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}
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}
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if (vga.svga_intf.choosevideomode)
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{
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return 4;
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}
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else if (!GRAPHIC_MODE)
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{
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//proc = vga_vh_text;
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*height = TEXT_LINES;
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*width = TEXT_COLUMNS * CHAR_WIDTH;
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return 1;
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}
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else if (vga.gc.data[5]&0x40)
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{
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//proc = vga_vh_vga;
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*height = LINES;
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*width = VGA_COLUMNS * 8;
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return 2;
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}
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else
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{
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//proc = vga_vh_ega;
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*height = LINES;
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*width = EGA_COLUMNS * 8;
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return 3;
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}
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}
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return 0;
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}
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SCREEN_UPDATE_RGB32( pc_video )
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{
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UINT8 cur_mode = 0;
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int w = 0, h = 0;
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cur_mode = pc_vga_choosevideomode(screen.machine(), &w, &h);
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if ((pc_current_width != w) || (pc_current_height != h))
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{
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int width = screen.width();
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int height = screen.height();
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pc_current_width = w;
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pc_current_height = h;
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if (pc_current_width > width)
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pc_current_width = width;
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if (pc_current_height > height)
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pc_current_height = height;
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if ((pc_current_width > 100) && (pc_current_height > 100))
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screen.set_visible_area(0, pc_current_width-1, 0, pc_current_height-1);
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bitmap.fill(0, cliprect);
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}
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//popmessage("%02x",cur_mode);
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switch(cur_mode)
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{
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case 0: bitmap.fill(get_black_pen(screen.machine()), cliprect);break;
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case 1: vga_vh_text(screen.machine(), bitmap,cliprect); break;
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case 2: vga_vh_vga (screen.machine(), bitmap,cliprect); break;
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case 3: vga_vh_ega (screen.machine(), bitmap,cliprect); break;
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/* Nothing uses this so far, to be nuked */
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case 4: vga.svga_intf.choosevideomode(vga.sequencer.data, vga.crtc.data, vga.gc.data, &w, &h); break;
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}
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return 0;
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}
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/***************************************************************************/
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static PALETTE_INIT( vga )
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{
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int i;
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for (i = 0; i < 0x100; i++)
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palette_set_color_rgb(machine, i, 0, 0, 0);
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}
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INLINE UINT8 rotate_right(UINT8 val, UINT8 rot)
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{
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@ -587,6 +830,8 @@ static WRITE8_HANDLER(vga_crtc_w)
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vga.line_compare = (((vga.crtc.data[0x09] & 0x40) << 3) | ((vga.crtc.data[0x07] & 0x10) << 4) | vga.crtc.data[0x18])/2;
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if (vga.crtc.index < vga.svga_intf.crtc_regcount)
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vga.crtc.data[vga.crtc.index] = data;
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//printf("%02x %02x\n",vga.crtc.index,data);
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break;
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}
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}
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@ -983,7 +1228,7 @@ static VIDEO_START( vga )
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vga.monitor.get_columns=vga_get_crtc_columns;
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vga.monitor.get_sync_lines=vga_get_crtc_sync_lines;
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vga.monitor.get_sync_columns=vga_get_crtc_sync_columns;
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pc_video_start(machine, pc_vga_choosevideomode);
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pc_video_start(machine);
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}
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static VIDEO_RESET( vga )
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@ -991,243 +1236,6 @@ static VIDEO_RESET( vga )
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pc_vga_reset(machine);
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}
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static void vga_vh_text(bitmap_ind16 &bitmap)
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{
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UINT8 ch, attr;
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UINT8 bits;
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UINT8 *font;
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UINT16 *bitmapline;
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int width=CHAR_WIDTH, height=CRTC_CHAR_HEIGHT;
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int pos, line, column, mask, w, h, addr;
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pen_t pen;
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if (CRTC_CURSOR_MODE!=CRTC_CURSOR_OFF)
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{
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if (++vga.cursor.time>=0x10)
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{
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vga.cursor.visible^=1;
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vga.cursor.time=0;
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||||
}
|
||||
}
|
||||
|
||||
for (addr = TEXT_START_ADDRESS, line = -CRTC_SKEW; line < TEXT_LINES;
|
||||
line += height, addr += TEXT_LINE_LENGTH)
|
||||
{
|
||||
for (pos = addr, column=0; column<TEXT_COLUMNS; column++, pos++)
|
||||
{
|
||||
ch = vga.memory[(pos<<2) + 0];
|
||||
attr = vga.memory[(pos<<2) + 1];
|
||||
font = vga.memory+2+(ch<<(5+2))+FONT1;
|
||||
|
||||
for (h = MAX(-line, 0); (h < height) && (line+h < MIN(TEXT_LINES, bitmap.height())); h++)
|
||||
{
|
||||
bitmapline = &bitmap.pix16(line+h);
|
||||
bits = font[h<<2];
|
||||
|
||||
assert(bitmapline);
|
||||
|
||||
for (mask=0x80, w=0; (w<width)&&(w<8); w++, mask>>=1)
|
||||
{
|
||||
if (bits&mask)
|
||||
pen = vga.pens[attr & 0x0f];
|
||||
else
|
||||
pen = vga.pens[attr >> 4];
|
||||
bitmapline[column*width+w] = pen;
|
||||
}
|
||||
if (w<width)
|
||||
{
|
||||
/* 9 column */
|
||||
if (TEXT_COPY_9COLUMN(ch)&&(bits&1))
|
||||
pen = vga.pens[attr & 0x0f];
|
||||
else
|
||||
pen = vga.pens[attr >> 4];
|
||||
bitmapline[column*width+w] = pen;
|
||||
}
|
||||
}
|
||||
if ((CRTC_CURSOR_MODE!=CRTC_CURSOR_OFF)
|
||||
&&vga.cursor.visible&&(pos==CRTC_CURSOR_POS))
|
||||
{
|
||||
for (h=CRTC_CURSOR_TOP;
|
||||
(h<=CRTC_CURSOR_BOTTOM)&&(h<height)&&(line+h<TEXT_LINES);
|
||||
h++)
|
||||
{
|
||||
bitmap.plot_box(column*width, line+h, width, 1, vga.pens[attr&0xf]);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void vga_vh_ega(bitmap_ind16 &bitmap)
|
||||
{
|
||||
int pos, line, column, c, addr, i;
|
||||
int height = CRTC_CHAR_HEIGHT;
|
||||
UINT16 *bitmapline;
|
||||
UINT16 *newbitmapline;
|
||||
pen_t pen;
|
||||
|
||||
for (addr=EGA_START_ADDRESS, pos=0, line=0; line<LINES;
|
||||
line += height, addr=(addr+EGA_LINE_LENGTH)&0x3ffff)
|
||||
{
|
||||
bitmapline = &bitmap.pix16(line);
|
||||
|
||||
for (pos=addr, c=0, column=0; column<EGA_COLUMNS; column++, c+=8, pos=(pos+4)&0x3ffff)
|
||||
{
|
||||
int data[4];
|
||||
|
||||
data[0]=vga.memory[pos];
|
||||
data[1]=vga.memory[pos+1]<<1;
|
||||
data[2]=vga.memory[pos+2]<<2;
|
||||
data[3]=vga.memory[pos+3]<<3;
|
||||
|
||||
for (i = 7; i >= 0; i--)
|
||||
{
|
||||
pen = vga.pens[(data[0]&1) | (data[1]&2) | (data[2]&4) | (data[3]&8)];
|
||||
bitmapline[c+i] = pen;
|
||||
|
||||
data[0]>>=1;
|
||||
data[1]>>=1;
|
||||
data[2]>>=1;
|
||||
data[3]>>=1;
|
||||
}
|
||||
}
|
||||
|
||||
for (i = 1; i < height; i++)
|
||||
{
|
||||
if (line + i >= LINES)
|
||||
break;
|
||||
|
||||
newbitmapline = &bitmap.pix16(line+i);
|
||||
memcpy(newbitmapline, bitmapline, EGA_COLUMNS * 8 * sizeof(UINT16));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void vga_vh_vga(bitmap_ind16 &bitmap)
|
||||
{
|
||||
int pos, line, column, c, addr, curr_addr;
|
||||
UINT16 *bitmapline;
|
||||
UINT16 mask_comp;
|
||||
|
||||
/* line compare is screen sensitive */
|
||||
mask_comp = 0xff | (LINES & 0x300);
|
||||
|
||||
curr_addr = 0;
|
||||
if(vga.sequencer.data[4] & 0x08)
|
||||
{
|
||||
for (addr = VGA_START_ADDRESS, line=0; line<LINES; line++, addr+=VGA_LINE_LENGTH, curr_addr+=VGA_LINE_LENGTH)
|
||||
{
|
||||
if(line < (vga.line_compare & mask_comp))
|
||||
curr_addr = addr;
|
||||
if(line == (vga.line_compare & mask_comp))
|
||||
curr_addr = 0;
|
||||
bitmapline = &bitmap.pix16(line);
|
||||
addr %= vga.svga_intf.vram_size;
|
||||
for (pos=curr_addr, c=0, column=0; column<VGA_COLUMNS; column++, c+=8, pos+=0x20)
|
||||
{
|
||||
if(pos + 0x20 > vga.svga_intf.vram_size)
|
||||
return;
|
||||
bitmapline[c+0] = vga.memory[pos+0];
|
||||
bitmapline[c+1] = vga.memory[pos+1];
|
||||
bitmapline[c+2] = vga.memory[pos+2];
|
||||
bitmapline[c+3] = vga.memory[pos+3];
|
||||
bitmapline[c+4] = vga.memory[pos+0x10];
|
||||
bitmapline[c+5] = vga.memory[pos+0x11];
|
||||
bitmapline[c+6] = vga.memory[pos+0x12];
|
||||
bitmapline[c+7] = vga.memory[pos+0x13];
|
||||
}
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
for (addr = VGA_START_ADDRESS, line=0; line<LINES; line++, addr+=VGA_LINE_LENGTH/4, curr_addr+=VGA_LINE_LENGTH/4)
|
||||
{
|
||||
if(line < (vga.line_compare & mask_comp))
|
||||
curr_addr = addr;
|
||||
if(line == (vga.line_compare & mask_comp))
|
||||
curr_addr = 0;
|
||||
bitmapline = &bitmap.pix16(line);
|
||||
addr %= vga.svga_intf.vram_size;
|
||||
for (pos=curr_addr, c=0, column=0; column<VGA_COLUMNS; column++, c+=8, pos+=0x08)
|
||||
{
|
||||
if(pos + 0x08 > vga.svga_intf.vram_size)
|
||||
return;
|
||||
bitmapline[c+0] = vga.memory[pos+0];
|
||||
bitmapline[c+1] = vga.memory[pos+1];
|
||||
bitmapline[c+2] = vga.memory[pos+2];
|
||||
bitmapline[c+3] = vga.memory[pos+3];
|
||||
bitmapline[c+4] = vga.memory[pos+4];
|
||||
bitmapline[c+5] = vga.memory[pos+5];
|
||||
bitmapline[c+6] = vga.memory[pos+6];
|
||||
bitmapline[c+7] = vga.memory[pos+7];
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static pc_video_update_proc pc_vga_choosevideomode(running_machine &machine, int *width, int *height)
|
||||
{
|
||||
pc_video_update_proc proc = NULL;
|
||||
int i;
|
||||
|
||||
if (CRTC_ON)
|
||||
{
|
||||
if (vga.dac.dirty)
|
||||
{
|
||||
for (i=0; i<256;i++)
|
||||
{
|
||||
palette_set_color_rgb(machine, i,(vga.dac.color[i].red & 0x3f) << 2,
|
||||
(vga.dac.color[i].green & 0x3f) << 2,
|
||||
(vga.dac.color[i].blue & 0x3f) << 2);
|
||||
}
|
||||
vga.dac.dirty = 0;
|
||||
}
|
||||
|
||||
if (vga.attribute.data[0x10] & 0x80)
|
||||
{
|
||||
for (i=0; i<16;i++)
|
||||
{
|
||||
vga.pens[i] = machine.pens[(vga.attribute.data[i]&0x0f)
|
||||
|((vga.attribute.data[0x14]&0xf)<<4)];
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
for (i=0; i<16;i++)
|
||||
{
|
||||
vga.pens[i]=machine.pens[(vga.attribute.data[i]&0x3f)
|
||||
|((vga.attribute.data[0x14]&0xc)<<4)];
|
||||
}
|
||||
}
|
||||
|
||||
if (vga.svga_intf.choosevideomode)
|
||||
proc = vga.svga_intf.choosevideomode(vga.sequencer.data, vga.crtc.data, vga.gc.data, width, height);
|
||||
|
||||
if (!proc)
|
||||
{
|
||||
if (!GRAPHIC_MODE)
|
||||
{
|
||||
proc = vga_vh_text;
|
||||
*height = TEXT_LINES;
|
||||
*width = TEXT_COLUMNS * CHAR_WIDTH;
|
||||
}
|
||||
else if (vga.gc.data[5]&0x40)
|
||||
{
|
||||
proc = vga_vh_vga;
|
||||
*height = LINES;
|
||||
*width = VGA_COLUMNS * 8;
|
||||
}
|
||||
else
|
||||
{
|
||||
proc = vga_vh_ega;
|
||||
*height = LINES;
|
||||
*width = EGA_COLUMNS * 8;
|
||||
}
|
||||
}
|
||||
}
|
||||
return proc;
|
||||
}
|
||||
|
||||
|
||||
|
||||
void *pc_vga_memory(void)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user