/[gxemul]/trunk/src/devices/dev_vga.c
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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Diff of /trunk/src/devices/dev_vga.c

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revision 12 by dpavlin, Mon Oct 8 16:18:38 2007 UTC revision 14 by dpavlin, Mon Oct 8 16:18:51 2007 UTC
# Line 25  Line 25 
25   *  SUCH DAMAGE.   *  SUCH DAMAGE.
26   *     *  
27   *   *
28   *  $Id: dev_vga.c,v 1.77 2005/07/15 07:34:06 debug Exp $   *  $Id: dev_vga.c,v 1.81 2005/10/07 22:10:52 debug Exp $
29   *   *
30   *  VGA charcell and graphics device.   *  VGA charcell and graphics device.
31   *   *
# Line 58  Line 58 
58  #define MAX_RETRACE_SCANLINES   420  #define MAX_RETRACE_SCANLINES   420
59  #define N_IS1_READ_THRESHOLD    50  #define N_IS1_READ_THRESHOLD    50
60    
 #define VGA_MEM_MAXY            60  
 #define VGA_MEM_ALLOCY          60  
61  #define GFX_ADDR_WINDOW         0x18000  #define GFX_ADDR_WINDOW         0x18000
62    
63  #define VGA_FB_ADDR     0x1c00000000ULL  #define VGA_FB_ADDR     0x1c00000000ULL
# Line 471  static void vga_update_cursor(struct mac Line 469  static void vga_update_cursor(struct mac
469  void dev_vga_tick(struct cpu *cpu, void *extra)  void dev_vga_tick(struct cpu *cpu, void *extra)
470  {  {
471          struct vga_data *d = extra;          struct vga_data *d = extra;
472          uint64_t low = (uint64_t)-1, high;          int64_t low = -1, high;
473    
474          vga_update_cursor(cpu->machine, d);          vga_update_cursor(cpu->machine, d);
475    
476          /*  TODO: text vs graphics tick?  */          /*  TODO: text vs graphics tick?  */
477          memory_device_dyntrans_access(cpu, cpu->mem, extra, &low, &high);          memory_device_dyntrans_access(cpu, cpu->mem, extra,
478                (uint64_t *) &low, (uint64_t *) &high);
479    
480          if ((int64_t)low != -1) {          if (low != -1) {
481                    int base = ((d->crtc_reg[VGA_CRTC_START_ADDR_HIGH] << 8)
482                        + d->crtc_reg[VGA_CRTC_START_ADDR_LOW]) * 2;
483                    int new_u_y1, new_u_y2;
484                  debug("[ dev_vga_tick: bintrans access, %llx .. %llx ]\n",                  debug("[ dev_vga_tick: bintrans access, %llx .. %llx ]\n",
485                      (long long)low, (long long)high);                      (long long)low, (long long)high);
486                    low -= base;
487                    high -= base;
488                  d->update_x1 = 0;                  d->update_x1 = 0;
489                  d->update_x2 = d->max_x - 1;                  d->update_x2 = d->max_x - 1;
490                  d->update_y1 = (low/2) / d->max_x;                  new_u_y1 = (low/2) / d->max_x;
491                  d->update_y2 = ((high/2) / d->max_x) + 1;                  new_u_y2 = ((high/2) / d->max_x) + 1;
492                    if (new_u_y1 < d->update_y1)
493                            d->update_y1 = new_u_y1;
494                    if (new_u_y2 > d->update_y2)
495                            d->update_y2 = new_u_y2;
496                    if (d->update_y2 < 0)
497                            d->update_y2 = 0;
498                  if (d->update_y2 >= d->max_y)                  if (d->update_y2 >= d->max_y)
499                          d->update_y2 = d->max_y - 1;                          d->update_y2 = d->max_y - 1;
500                  d->modified = 1;                  d->modified = 1;
# Line 1132  void dev_vga_init(struct machine *machin Line 1142  void dev_vga_init(struct machine *machin
1142          uint64_t videomem_base, uint64_t control_base, char *name)          uint64_t videomem_base, uint64_t control_base, char *name)
1143  {  {
1144          struct vga_data *d;          struct vga_data *d;
1145          int i, x,y, tmpi;          int i, tmpi;
1146          size_t allocsize;          size_t allocsize;
1147    
1148          d = malloc(sizeof(struct vga_data));          d = malloc(sizeof(struct vga_data));
# Line 1152  void dev_vga_init(struct machine *machin Line 1162  void dev_vga_init(struct machine *machin
1162          d->pixel_repy     = 1;          d->pixel_repy     = 1;
1163          d->cur_mode       = MODE_CHARCELL;          d->cur_mode       = MODE_CHARCELL;
1164          d->crtc_reg[0xff] = 0x03;          d->crtc_reg[0xff] = 0x03;
1165          d->charcells_size = d->max_x * VGA_MEM_MAXY * 2;          d->charcells_size = 0x8000;
1166          d->gfx_mem_size   = 1;  /*  Nothing, as we start in text mode  */          d->gfx_mem_size   = 1;  /*  Nothing, as we start in text mode  */
1167    
1168          /*  Allocate in 4KB pages, to make it possible to use bintrans:  */          /*  Allocate in full pages, to make it possible to use bintrans:  */
1169          allocsize = ((d->charcells_size - 1) | 0xfff) + 1;          allocsize = ((d->charcells_size-1) | (machine->arch_pagesize-1)) + 1;
1170          d->charcells = malloc(d->charcells_size);          d->charcells = malloc(d->charcells_size);
1171          d->charcells_outputed = malloc(d->charcells_size);          d->charcells_outputed = malloc(d->charcells_size);
1172          d->gfx_mem = malloc(d->gfx_mem_size);          d->gfx_mem = malloc(d->gfx_mem_size);
# Line 1166  void dev_vga_init(struct machine *machin Line 1176  void dev_vga_init(struct machine *machin
1176                  exit(1);                  exit(1);
1177          }          }
1178    
1179          for (y=0; y<VGA_MEM_MAXY; y++) {          for (i=0; i<d->charcells_size; i+=2) {
1180                  for (x=0; x<d->max_x; x++) {                  d->charcells[i] = ' ';
1181                          char ch = ' ';                  d->charcells[i+1] = 0x07;  /*  Default color  */
                         i = (x + d->max_x * y) * 2;  
                         d->charcells[i] = ch;  
                         d->charcells[i+1] = 0x07;  /*  Default color  */  
                 }  
1182          }          }
1183    
1184          memset(d->charcells_outputed, 0, d->charcells_size);          memset(d->charcells_outputed, 0, d->charcells_size);
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