Mercurial > repos > blastem

comparison vdp.h @ 470:541c1ae8abf3

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Properly delay 68K on VDP reads. Dummy VDP test port implementation. Initial stab at handling undefined bits of VSRAM and CRAM.
author Mike Pavone <pavone@retrodev.com>
date Fri, 13 Sep 2013 19:22:46 -0700
parents 140af5509ce7
children f065769836e8
comparison
equal deleted inserted replaced
469:5f3344d0d42f 470:541c1ae8abf3
1 /* 1 /*
2 Copyright 2013 Michael Pavone 2 Copyright 2013 Michael Pavone
3 This file is part of BlastEm. 3 This file is part of BlastEm.
4 BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text. 4 BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text.
5 */ 5 */
6 #ifndef VDP_H_ 6 #ifndef VDP_H_
7 #define VDP_H_ 7 #define VDP_H_
8 8
45 #define FLAG_DMA_RUN 0x40 45 #define FLAG_DMA_RUN 0x40
46 #define FLAG_DMA_PROG 0x80 46 #define FLAG_DMA_PROG 0x80
47 47
48 #define FLAG2_VINT_PENDING 0x01 48 #define FLAG2_VINT_PENDING 0x01
49 #define FLAG2_HINT_PENDING 0x02 49 #define FLAG2_HINT_PENDING 0x02
50 #define FLAG2_READ_PENDING 0x04
50 51
51 #define DISPLAY_ENABLE 0x40 52 #define DISPLAY_ENABLE 0x40
52 53
53 enum { 54 enum {
54 REG_MODE_1=0, 55 REG_MODE_1=0,
147 sprite_draw sprite_draw_list[MAX_DRAWS]; 148 sprite_draw sprite_draw_list[MAX_DRAWS];
148 sprite_info sprite_info_list[MAX_SPRITES_LINE]; 149 sprite_info sprite_info_list[MAX_SPRITES_LINE];
149 uint16_t col_1; 150 uint16_t col_1;
150 uint16_t col_2; 151 uint16_t col_2;
151 uint16_t last_write_val; 152 uint16_t last_write_val;
153 uint16_t last_fifo_val;
152 uint8_t v_offset; 154 uint8_t v_offset;
153 uint8_t dma_cd; 155 uint8_t dma_cd;
154 uint8_t hint_counter; 156 uint8_t hint_counter;
155 uint8_t flags2; 157 uint8_t flags2;
156 uint8_t double_res; 158 uint8_t double_res;
170 void vdp_run_dma_done(vdp_context * context, uint32_t target_cycles); 172 void vdp_run_dma_done(vdp_context * context, uint32_t target_cycles);
171 uint8_t vdp_load_gst(vdp_context * context, FILE * state_file); 173 uint8_t vdp_load_gst(vdp_context * context, FILE * state_file);
172 uint8_t vdp_save_gst(vdp_context * context, FILE * outfile); 174 uint8_t vdp_save_gst(vdp_context * context, FILE * outfile);
173 int vdp_control_port_write(vdp_context * context, uint16_t value); 175 int vdp_control_port_write(vdp_context * context, uint16_t value);
174 int vdp_data_port_write(vdp_context * context, uint16_t value); 176 int vdp_data_port_write(vdp_context * context, uint16_t value);
177 void vdp_test_port_write(vdp_context * context, uint16_t value);
175 uint16_t vdp_control_port_read(vdp_context * context); 178 uint16_t vdp_control_port_read(vdp_context * context);
176 uint16_t vdp_data_port_read(vdp_context * context); 179 uint16_t vdp_data_port_read(vdp_context * context);
177 uint16_t vdp_hv_counter_read(vdp_context * context); 180 uint16_t vdp_hv_counter_read(vdp_context * context);
181 uint16_t vdp_test_port_read(vdp_context * context);
178 void vdp_adjust_cycles(vdp_context * context, uint32_t deduction); 182 void vdp_adjust_cycles(vdp_context * context, uint32_t deduction);
179 uint32_t vdp_next_hint(vdp_context * context); 183 uint32_t vdp_next_hint(vdp_context * context);
180 uint32_t vdp_next_vint(vdp_context * context); 184 uint32_t vdp_next_vint(vdp_context * context);
181 uint32_t vdp_next_vint_z80(vdp_context * context); 185 uint32_t vdp_next_vint_z80(vdp_context * context);
182 void vdp_int_ack(vdp_context * context, uint16_t int_num); 186 void vdp_int_ack(vdp_context * context, uint16_t int_num);