src/mess/video/upd7220.c
| r10490 | r10491 | |
|---|
| 465 | 465 | } |
| 466 | 466 | |
| 467 | 467 | /*------------------------------------------------- |
| 468 | write_vram - write in the device memory space |
| 469 | -------------------------------------------------*/ |
| 470 | |
| 471 | static void write_vram(upd7220_t *upd7220,UINT8 type, UINT8 mod) |
| 472 | { |
| 473 | if(type == 1) |
| 474 | { |
| 475 | logerror("uPD7220 invalid type 1 WDAT parameter\n"); |
| 476 | return; |
| 477 | } |
| 478 | |
| 479 | switch(mod & 3) |
| 480 | { |
| 481 | case 0x00: //replace |
| 482 | switch(type) |
| 483 | { |
| 484 | case 0: upd7220->vram[upd7220->ead] = ((upd7220->pr[1]) | (upd7220->pr[2] << 8)) & upd7220->mask; break; |
| 485 | case 2: upd7220->vram[upd7220->ead] = (((upd7220->pr[1] & upd7220->mask) & 0xff) | (upd7220->vram[upd7220->ead] & 0xff00)); break; |
| 486 | case 3: upd7220->vram[upd7220->ead] = (((upd7220->pr[1] & upd7220->mask) << 8) | (upd7220->vram[upd7220->ead] & 0x00ff)); break; |
| 487 | } |
| 488 | break; |
| 489 | case 0x01: //complement |
| 490 | break; |
| 491 | case 0x02: //reset to zero |
| 492 | break; |
| 493 | case 0x03: //set to one |
| 494 | break; |
| 495 | } |
| 496 | } |
| 497 | |
| 498 | /*------------------------------------------------- |
| 468 | 499 | advance_ead - advance EAD pointer |
| 469 | 500 | -------------------------------------------------*/ |
| 470 | 501 | |
| r10490 | r10491 | |
|---|
| 782 | 813 | break; |
| 783 | 814 | |
| 784 | 815 | case COMMAND_WDAT: /* write data into display memory */ |
| 785 | | logerror("uPD7220 '%s' Unimplemented command WDAT\n", device->tag()); |
| 786 | | if (upd7220->param_ptr == 3) |
| 816 | if (upd7220->param_ptr == 3 || (upd7220->param_ptr == 2 && upd7220->cr & 0x10)) |
| 787 | 817 | { |
| 788 | | printf("%02x %02x (%c) %04x\n",upd7220->pr[2],upd7220->pr[1],upd7220->pr[1],EAD); |
| 818 | //printf("%02x = %02x %02x (%c) %04x\n",upd7220->cr,upd7220->pr[2],upd7220->pr[1],upd7220->pr[1],EAD); |
| 789 | 819 | |
| 790 | | upd7220->vram[1] = 0x1234; |
| 820 | write_vram(upd7220,(upd7220->cr |
| 791 | 821 | advance_ead(upd7220); |
| 792 | 822 | } |
| 793 | 823 | break; |