| 1 | /*************************************************************************** |
| 2 | * This program is free software; you can redistribute it and/or modify * |
| 3 | * it under the terms of the GNU General Public License as published by * |
| 4 | * the Free Software Foundation; either version 2 of the License, or * |
| 5 | * (at your option) any later version. * |
| 6 | * * |
| 7 | * This program is distributed in the hope that it will be useful, * |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
| 10 | * GNU General Public License for more details. * |
| 11 | ***************************************************************************/ |
| 12 | |
| 13 | #include "gpu.h" |
| 14 | #include "psxdma.h" |
| 15 | |
| 16 | void gpu_state_change(int what) |
| 17 | { |
| 18 | enum psx_gpu_state state = what; |
| 19 | switch (state) |
| 20 | { |
| 21 | case PGS_VRAM_TRANSFER_START: |
| 22 | HW_GPU_STATUS &= ~SWAP32(PSXGPU_nBUSY); |
| 23 | break; |
| 24 | case PGS_VRAM_TRANSFER_END: |
| 25 | HW_GPU_STATUS |= SWAP32(PSXGPU_nBUSY); |
| 26 | break; |
| 27 | case PGS_PRIMITIVE_START: |
| 28 | HW_GPU_STATUS &= ~SWAP32(PSXGPU_nBUSY); |
| 29 | GPUDMA_INT(200); // see gpuInterrupt |
| 30 | break; |
| 31 | } |
| 32 | } |