Mercurial > repos > blastem
view vdp.h @ 2073:c69e42444f96
Fix some cycle adjustment stuff and an off-by one on hte TOCT response
author | Michael Pavone <pavone@retrodev.com> |
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date | Mon, 31 Jan 2022 00:01:15 -0800 |
parents | a61b47d5489e |
children | 01ff005b08f6 |
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/* Copyright 2013 Michael Pavone This file is part of BlastEm. BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text. */ #ifndef VDP_H_ #define VDP_H_ #include <stdint.h> #include <stdio.h> #include "system.h" #include "serialize.h" #define VDP_REGS 24 #define CRAM_SIZE 64 #define SHADOW_OFFSET CRAM_SIZE #define HIGHLIGHT_OFFSET (SHADOW_OFFSET+CRAM_SIZE) #define MODE4_OFFSET (HIGHLIGHT_OFFSET+CRAM_SIZE) #define MIN_VSRAM_SIZE 40 #define MAX_VSRAM_SIZE 64 #define VRAM_SIZE (64*1024) #define BORDER_LEFT 13 #define BORDER_RIGHT 14 #define HORIZ_BORDER (BORDER_LEFT+BORDER_RIGHT) #define LINEBUF_SIZE (320+HORIZ_BORDER) //H40 + full border #define SCROLL_BUFFER_SIZE 32 #define BORDER_BOTTOM 13 //TODO: Replace with actual value #define MAX_DRAWS_H32_MODE4 8 #define MAX_SPRITES_LINE 20 #define MAX_SPRITES_LINE_H32 16 #define MAX_SPRITES_FRAME 80 #define MAX_SPRITES_FRAME_H32 64 #define SAT_CACHE_SIZE (MAX_SPRITES_FRAME * 4) #define FBUF_SHADOW 0x0001 #define FBUF_HILIGHT 0x0010 #define FBUF_MODE4 0x0100 #define DBG_SHADOW 0x10 #define DBG_HILIGHT 0x20 #define DBG_PRIORITY 0x8 #define DBG_SRC_MASK 0x7 #define DBG_SRC_A 0x1 #define DBG_SRC_W 0x2 #define DBG_SRC_B 0x3 #define DBG_SRC_S 0x4 #define DBG_SRC_BG 0x0 #define MCLKS_LINE 3420 #define FLAG_DOT_OFLOW 0x01 #define FLAG_CAN_MASK 0x02 #define FLAG_MASKED 0x04 #define FLAG_WINDOW 0x08 #define FLAG_PENDING 0x10 #define FLAG_READ_FETCHED 0x20 #define FLAG_DMA_RUN 0x40 #define FLAG_WINDOW_EDGE 0x80 #define FLAG2_VINT_PENDING 0x01 #define FLAG2_HINT_PENDING 0x02 #define FLAG2_READ_PENDING 0x04 #define FLAG2_SPRITE_COLLIDE 0x08 #define FLAG2_REGION_PAL 0x10 #define FLAG2_EVEN_FIELD 0x20 #define FLAG2_BYTE_PENDING 0x40 #define FLAG2_PAUSE 0x80 #define DISPLAY_ENABLE 0x40 enum { REG_MODE_1=0, REG_MODE_2, REG_SCROLL_A, REG_WINDOW, REG_SCROLL_B, REG_SAT, REG_STILE_BASE, REG_BG_COLOR, REG_X_SCROLL, REG_Y_SCROLL, REG_HINT, REG_MODE_3, REG_MODE_4, REG_HSCROLL, REG_BGTILE_BASE, REG_AUTOINC, REG_SCROLL, REG_WINDOW_H, REG_WINDOW_V, REG_DMALEN_L, REG_DMALEN_H, REG_DMASRC_L, REG_DMASRC_M, REG_DMASRC_H, REG_KMOD_CTRL=29, REG_KMOD_MSG, REG_KMOD_TIMER }; //Mode reg 1 #define BIT_VSCRL_LOCK 0x80 #define BIT_HSCRL_LOCK 0x40 #define BIT_COL0_MASK 0x20 #define BIT_HINT_EN 0x10 #define BIT_SPRITE_8PX 0x08 #define BIT_PAL_SEL 0x04 #define BIT_MODE_4 BIT_PAL_SEL #define BIT_HVC_LATCH 0x02 #define BIT_DISP_DIS 0x01 //Mode reg 2 #define BIT_128K_VRAM 0x80 #define BIT_DISP_EN 0x40 #define BIT_VINT_EN 0x20 #define BIT_DMA_ENABLE 0x10 #define BIT_PAL 0x08 #define BIT_MODE_5 0x04 #define BIT_SPRITE_SZ 0x02 //Mode reg 3 #define BIT_EINT_EN 0x08 #define BIT_VSCROLL 0x04 //Mode reg 4 #define BIT_H40 0x01 #define BIT_HILIGHT 0x8 #define BIT_DOUBLE_RES 0x4 #define BIT_INTERLACE 0x2 //Test register #define TEST_BIT_DISABLE 0x40 typedef struct { uint16_t address; int16_t x_pos; uint8_t pal_priority; uint8_t h_flip; uint8_t width; uint8_t height; } sprite_draw; typedef struct { uint8_t size; uint8_t index; int16_t y; } sprite_info; #define FIFO_SIZE 4 typedef struct { uint32_t cycle; uint32_t address; uint16_t value; uint8_t cd; uint8_t partial; } fifo_entry; enum { VDP_DEBUG_PLANE, VDP_DEBUG_VRAM, VDP_DEBUG_CRAM, VDP_DEBUG_COMPOSITE, VDP_NUM_DEBUG_TYPES }; typedef struct { system_header *system; //pointer to current line in framebuffer uint32_t *output; //pointer to current framebuffer uint32_t *fb; uint8_t *done_composite; uint32_t *debug_fbs[VDP_NUM_DEBUG_TYPES]; char *kmod_msg_buffer; uint32_t kmod_buffer_storage; uint32_t kmod_buffer_length; uint32_t timer_start_cycle; uint32_t output_pitch; uint32_t debug_fb_pitch[VDP_NUM_DEBUG_TYPES]; fifo_entry fifo[FIFO_SIZE]; int32_t fifo_write; int32_t fifo_read; uint32_t address; uint32_t address_latch; uint32_t serial_address; uint32_t colors[CRAM_SIZE*4]; uint32_t debugcolors[1 << (3 + 1 + 1 + 1)];//3 bits for source, 1 bit for priority, 1 bit for shadow, 1 bit for hilight uint16_t cram[CRAM_SIZE]; uint32_t frame; uint32_t vsram_size; uint8_t cd; uint8_t cd_latch; uint8_t flags; uint8_t regs[VDP_REGS]; //cycle count in MCLKs uint32_t cycles; uint32_t pending_vint_start; uint32_t pending_hint_start; uint32_t top_offset; uint16_t vsram[MAX_VSRAM_SIZE]; uint16_t vscroll_latch[2]; uint16_t vcounter; uint16_t inactive_start; uint16_t border_top; uint16_t border_bot; uint16_t hscroll_a; uint16_t hscroll_a_fine; uint16_t hscroll_b; uint16_t hscroll_b_fine; uint16_t h40_lines; uint16_t output_lines; sprite_draw sprite_draw_list[MAX_SPRITES_LINE]; sprite_info sprite_info_list[MAX_SPRITES_LINE]; uint8_t sat_cache[SAT_CACHE_SIZE]; uint16_t col_1; uint16_t col_2; uint16_t hv_latch; uint16_t prefetch; uint16_t test_port; //stores 2-bit palette + 4-bit palette index + priority for current sprite line uint8_t linebuf[LINEBUF_SIZE]; uint8_t compositebuf[LINEBUF_SIZE]; uint8_t layer_debug_buf[LINEBUF_SIZE]; uint8_t hslot; //hcounter/2 uint8_t sprite_index; uint8_t sprite_draws; int8_t slot_counter; int8_t cur_slot; uint8_t sprite_x_offset; uint8_t max_sprites_frame; uint8_t max_sprites_line; uint8_t fetch_tmp[2]; uint8_t v_offset; uint8_t hint_counter; uint8_t flags2; uint8_t double_res; uint8_t buf_a_off; uint8_t buf_b_off; uint8_t pending_byte; uint8_t state; uint8_t cur_buffer; uint8_t tmp_buf_a[SCROLL_BUFFER_SIZE]; uint8_t tmp_buf_b[SCROLL_BUFFER_SIZE]; uint8_t enabled_debuggers; uint8_t debug_fb_indices[VDP_NUM_DEBUG_TYPES]; uint8_t debug_modes[VDP_NUM_DEBUG_TYPES]; uint8_t pushed_frame; uint8_t vdpmem[]; } vdp_context; vdp_context *init_vdp_context(uint8_t region_pal, uint8_t has_max_vsram); void vdp_free(vdp_context *context); void vdp_run_context_full(vdp_context * context, uint32_t target_cycles); void vdp_run_context(vdp_context * context, uint32_t target_cycles); //runs from current cycle count to VBLANK for the current mode, returns ending cycle count uint32_t vdp_run_to_vblank(vdp_context * context); //runs until the target cycle is reached or the current DMA operation has completed, whicever comes first void vdp_run_dma_done(vdp_context * context, uint32_t target_cycles); uint8_t vdp_load_gst(vdp_context * context, FILE * state_file); uint8_t vdp_save_gst(vdp_context * context, FILE * outfile); int vdp_control_port_write(vdp_context * context, uint16_t value); void vdp_control_port_write_pbc(vdp_context * context, uint8_t value); int vdp_data_port_write(vdp_context * context, uint16_t value); void vdp_data_port_write_pbc(vdp_context * context, uint8_t value); void vdp_test_port_write(vdp_context * context, uint16_t value); uint16_t vdp_control_port_read(vdp_context * context); uint16_t vdp_data_port_read(vdp_context * context); uint8_t vdp_data_port_read_pbc(vdp_context * context); void vdp_latch_hv(vdp_context *context); uint16_t vdp_hv_counter_read(vdp_context * context); void vdp_adjust_cycles(vdp_context * context, uint32_t deduction); uint32_t vdp_next_hint(vdp_context * context); uint32_t vdp_next_vint(vdp_context * context); uint32_t vdp_next_vint_z80(vdp_context * context); uint32_t vdp_next_nmi(vdp_context *context); void vdp_int_ack(vdp_context * context); void vdp_print_sprite_table(vdp_context * context); void vdp_print_reg_explain(vdp_context * context); void latch_mode(vdp_context * context); uint32_t vdp_cycles_to_frame_end(vdp_context * context); void write_cram_internal(vdp_context * context, uint16_t addr, uint16_t value); void vdp_check_update_sat_byte(vdp_context *context, uint32_t address, uint8_t value); void vdp_pbc_pause(vdp_context *context); void vdp_release_framebuffer(vdp_context *context); void vdp_reacquire_framebuffer(vdp_context *context); void vdp_serialize(vdp_context *context, serialize_buffer *buf); void vdp_deserialize(deserialize_buffer *buf, void *vcontext); void vdp_force_update_framebuffer(vdp_context *context); void vdp_toggle_debug_view(vdp_context *context, uint8_t debug_type); void vdp_inc_debug_mode(vdp_context *context); //to be implemented by the host system uint16_t read_dma_value(uint32_t address); void vdp_replay_event(vdp_context *context, uint8_t event, event_reader *reader); #endif //VDP_H_