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comparison vdp.c @ 1427:4e5797b3935a

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WIP - New savestate format
author Michael Pavone <pavone@retrodev.com>
date Sun, 06 Aug 2017 00:06:36 -0700
parents 2b34469e3f81
children 2540c05520f2
comparison
equal deleted inserted replaced
1426:957325c990d5 1427:4e5797b3935a
2994 //printf("New Address: %X, New CD: %X\n", context->address, context->cd); 2994 //printf("New Address: %X, New CD: %X\n", context->address, context->cd);
2995 if (context->cd & 0x20) { 2995 if (context->cd & 0x20) {
2996 // 2996 //
2997 if((context->regs[REG_DMASRC_H] & 0xC0) != 0x80) { 2997 if((context->regs[REG_DMASRC_H] & 0xC0) != 0x80) {
2998 //DMA copy or 68K -> VDP, transfer starts immediately 2998 //DMA copy or 68K -> VDP, transfer starts immediately
2999 context->dma_cd = context->cd;
3000 //printf("DMA start (length: %X) at cycle %d, frame: %d, vcounter: %d, hslot: %d\n", (context->regs[REG_DMALEN_H] << 8) | context->regs[REG_DMALEN_L], context->cycles, context->frame, context->vcounter, context->hslot); 2999 //printf("DMA start (length: %X) at cycle %d, frame: %d, vcounter: %d, hslot: %d\n", (context->regs[REG_DMALEN_H] << 8) | context->regs[REG_DMALEN_L], context->cycles, context->frame, context->vcounter, context->hslot);
3001 if (!(context->regs[REG_DMASRC_H] & 0x80)) { 3000 if (!(context->regs[REG_DMASRC_H] & 0x80)) {
3002 //printf("DMA Address: %X, New CD: %X, Source: %X, Length: %X\n", context->address, context->cd, (context->regs[REG_DMASRC_H] << 17) | (context->regs[REG_DMASRC_M] << 9) | (context->regs[REG_DMASRC_L] << 1), context->regs[REG_DMALEN_H] << 8 | context->regs[REG_DMALEN_L]); 3001 //printf("DMA Address: %X, New CD: %X, Source: %X, Length: %X\n", context->address, context->cd, (context->regs[REG_DMASRC_H] << 17) | (context->regs[REG_DMASRC_M] << 9) | (context->regs[REG_DMASRC_L] << 1), context->regs[REG_DMALEN_H] << 8 | context->regs[REG_DMALEN_L]);
3003 //68K -> VDP DMA takes a few slots to actually start reading even though it acquires the bus immediately 3002 //68K -> VDP DMA takes a few slots to actually start reading even though it acquires the bus immediately
3004 //logic analyzer captures made it seem like the proper value is 4 slots, but that seems to cause trouble with the Nemesis' FIFO Wait State test 3003 //logic analyzer captures made it seem like the proper value is 4 slots, but that seems to cause trouble with the Nemesis' FIFO Wait State test
3524 context->flags2 &= ~FLAG2_HINT_PENDING; 3523 context->flags2 &= ~FLAG2_HINT_PENDING;
3525 } 3524 }
3526 } 3525 }
3527 } 3526 }
3528 3527
3528 void vdp_serialize(vdp_context *context, serialize_buffer *buf)
3529 {
3530 save_int8(buf, VRAM_SIZE / 1024);//VRAM size in KB, needed for future proofing
3531 save_buffer8(buf, context->vdpmem, VRAM_SIZE);
3532 save_buffer16(buf, context->cram, CRAM_SIZE);
3533 save_buffer16(buf, context->vsram, VSRAM_SIZE);
3534 save_buffer8(buf, context->sat_cache, SAT_CACHE_SIZE);
3535 for (int i = 0; i <= REG_DMASRC_H; i++)
3536 {
3537 save_int8(buf, context->regs[i]);
3538 }
3539 save_int32(buf, context->address);
3540 save_int32(buf, context->serial_address);
3541 save_int8(buf, context->cd);
3542 uint8_t fifo_size;
3543 if (context->fifo_read < 0) {
3544 fifo_size = 0;
3545 } else if (context->fifo_write > context->fifo_read) {
3546 fifo_size = context->fifo_write - context->fifo_read;
3547 } else {
3548 fifo_size = context->fifo_write + FIFO_SIZE - context->fifo_read;
3549 }
3550 save_int8(buf, fifo_size);
3551 for (int i = 0, cur = context->fifo_read; i < fifo_size; i++)
3552 {
3553 fifo_entry *entry = context->fifo + cur;
3554 cur = (cur + 1) & (FIFO_SIZE - 1);
3555 save_int32(buf, entry->cycle);
3556 save_int32(buf, entry->address);
3557 save_int16(buf, entry->value);
3558 save_int8(buf, entry->cd);
3559 save_int8(buf, entry->partial);
3560 }
3561 //FIXME: Flag bits should be rearranged for maximum correspondence to status reg
3562 save_int16(buf, context->flags2 << 8 | context->flags);
3563 save_int32(buf, context->frame);
3564 save_int16(buf, context->vcounter);
3565 save_int8(buf, context->hslot);
3566 save_int16(buf, context->hv_latch);
3567 save_int8(buf, context->state);
3568 save_int16(buf, context->hscroll_a);
3569 save_int16(buf, context->hscroll_b);
3570 save_int16(buf, context->vscroll_latch[0]);
3571 save_int16(buf, context->vscroll_latch[1]);
3572 save_int16(buf, context->col_1);
3573 save_int16(buf, context->col_2);
3574 save_int16(buf, context->test_port);
3575 save_buffer8(buf, context->tmp_buf_a, SCROLL_BUFFER_SIZE);
3576 save_buffer8(buf, context->tmp_buf_b, SCROLL_BUFFER_SIZE);
3577 save_int8(buf, context->buf_a_off);
3578 save_int8(buf, context->buf_b_off);
3579 //FIXME: Sprite rendering state is currently a mess
3580 save_int8(buf, context->sprite_index);
3581 save_int8(buf, context->sprite_draws);
3582 save_int8(buf, context->slot_counter);
3583 save_int8(buf, context->cur_slot);
3584 for (int i = 0; i < MAX_DRAWS; i++)
3585 {
3586 sprite_draw *draw = context->sprite_draw_list + i;
3587 save_int16(buf, draw->address);
3588 save_int16(buf, draw->x_pos);
3589 save_int8(buf, draw->pal_priority);
3590 save_int8(buf, draw->h_flip);
3591 }
3592 for (int i = 0; i < MAX_SPRITES_LINE; i++)
3593 {
3594 sprite_info *info = context->sprite_info_list + i;
3595 save_int8(buf, info->size);
3596 save_int8(buf, info->index);
3597 save_int16(buf, info->y);
3598 }
3599 save_buffer8(buf, context->linebuf, LINEBUF_SIZE);
3600
3601 save_int32(buf, context->cycles);
3602 save_int32(buf, context->pending_vint_start);
3603 save_int32(buf, context->pending_hint_start);
3604 }
3605
3606 void vdp_deserialize(deserialize_buffer *buf, void *vcontext)
3607 {
3608 vdp_context *context = vcontext;
3609 uint8_t vramk = load_int8(buf);
3610 load_buffer8(buf, context->vdpmem, (vramk * 1024) <= VRAM_SIZE ? vramk * 1024 : VRAM_SIZE);
3611 if ((vramk * 1024) > VRAM_SIZE) {
3612 buf->cur_pos += (vramk * 1024) - VRAM_SIZE;
3613 }
3614 load_buffer16(buf, context->cram, CRAM_SIZE);
3615 load_buffer16(buf, context->vsram, VSRAM_SIZE);
3616 load_buffer8(buf, context->sat_cache, SAT_CACHE_SIZE);
3617 for (int i = 0; i <= REG_DMASRC_H; i++)
3618 {
3619 context->regs[i] = load_int8(buf);
3620 }
3621 context->address = load_int32(buf);
3622 context->serial_address = load_int32(buf);
3623 context->cd = load_int8(buf);
3624 uint8_t fifo_size = load_int8(buf);
3625 if (fifo_size > FIFO_SIZE) {
3626 fatal_error("Invalid fifo size %d", fifo_size);
3627 }
3628 if (fifo_size) {
3629 context->fifo_read = 0;
3630 context->fifo_write = fifo_size & (FIFO_SIZE - 1);
3631 for (int i = 0; i < fifo_size; i++)
3632 {
3633 fifo_entry *entry = context->fifo + i;
3634 entry->cycle = load_int32(buf);
3635 entry->address = load_int32(buf);
3636 entry->value = load_int16(buf);
3637 entry->cd = load_int8(buf);
3638 entry->partial = load_int8(buf);
3639 }
3640 } else {
3641 context->fifo_read = -1;
3642 context->fifo_write = 0;
3643 }
3644 uint16_t flags = load_int16(buf);
3645 context->flags2 = flags >> 8;
3646 context->flags = flags;
3647 context->frame = load_int32(buf);
3648 context->vcounter = load_int16(buf);
3649 context->hslot = load_int8(buf);
3650 context->hv_latch = load_int16(buf);
3651 context->state = load_int8(buf);
3652 context->hscroll_a = load_int16(buf);
3653 context->hscroll_b = load_int16(buf);
3654 context->vscroll_latch[0] = load_int16(buf);
3655 context->vscroll_latch[1] = load_int16(buf);
3656 context->col_1 = load_int16(buf);
3657 context->col_2 = load_int16(buf);
3658 context->test_port = load_int16(buf);
3659 load_buffer8(buf, context->tmp_buf_a, SCROLL_BUFFER_SIZE);
3660 load_buffer8(buf, context->tmp_buf_b, SCROLL_BUFFER_SIZE);
3661 context->buf_a_off = load_int8(buf) & SCROLL_BUFFER_MASK;
3662 context->buf_b_off = load_int8(buf) & SCROLL_BUFFER_MASK;
3663 context->sprite_index = load_int8(buf);
3664 context->sprite_draws = load_int8(buf);
3665 context->slot_counter = load_int8(buf);
3666 context->cur_slot = load_int8(buf);
3667 for (int i = 0; i < MAX_DRAWS; i++)
3668 {
3669 sprite_draw *draw = context->sprite_draw_list + i;
3670 draw->address = load_int16(buf);
3671 draw->x_pos = load_int16(buf);
3672 draw->pal_priority = load_int8(buf);
3673 draw->h_flip = load_int8(buf);
3674 }
3675 for (int i = 0; i < MAX_SPRITES_LINE; i++)
3676 {
3677 sprite_info *info = context->sprite_info_list + i;
3678 info->size = load_int8(buf);
3679 info->index = load_int8(buf);
3680 info->y = load_int16(buf);
3681 }
3682 load_buffer8(buf, context->linebuf, LINEBUF_SIZE);
3683
3684 context->cycles = load_int32(buf);
3685 context->pending_vint_start = load_int32(buf);
3686 context->pending_hint_start = load_int32(buf);
3687 update_video_params(context);
3688 }