source/src/vm/bubcom80/display.h

   1 /*
   2         Systems Formulate BUBCOM80 Emulator 'eBUBCOM80'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2018.05.08-
   6
   7         [ display ]
   8 */
   9
  10 #ifndef _DISPLAY_H_
  11 #define _DISPLAY_H_
  12
  13 #include "../vm.h"
  14 #include "../../emu.h"
  15 #include "../device.h"
  16
  17 #define SIG_DISPLAY_DMAC_CH0    0
  18 #define SIG_DISPLAY_DMAC_CH1    1
  19 #define SIG_DISPLAY_DMAC_CH2    2
  20 #define SIG_DISPLAY_DMAC_CH3    3
  21
  22 class Z80;
  23
  24 namespace BUBCOM80 {
  25 typedef struct {
  26         struct {
  27                 int rate, counter;
  28                 uint8_t cursor, attrib;
  29         } blink;
  30         struct {
  31                 int type, mode;
  32                 int x, y;
  33         } cursor;
  34         struct {
  35                 uint8_t data;
  36                 int num;
  37                 uint8_t expand[200][80];
  38         } attrib;
  39         struct {
  40                 uint8_t expand[200][80];
  41         } text;
  42         int width, height;
  43         int char_height;
  44         bool skip_line;
  45         int vretrace;
  46         bool timing_changed;
  47         uint8_t buffer[120 * 200];
  48         int buffer_ptr;
  49         uint8_t cmd;
  50         int cmd_ptr;
  51         uint8_t mode, reverse, intr_mask, status;
  52         bool vblank;
  53
  54         void reset();
  55         void write_cmd(uint8_t data);
  56         void write_param(uint8_t data);
  57         uint32_t read_param();
  58         uint32_t read_status();
  59         void start();
  60         void finish();
  61         void write_buffer(uint8_t data);
  62         uint8_t read_buffer(int ofs);
  63         void update_blink();
  64         void expand_buffer();
  65         void set_attrib(uint8_t code);
  66 } crtc_t;
  67
  68 typedef struct {
  69         struct {
  70                 pair_t addr, count;
  71                 uint8_t mode;
  72                 int nbytes;
  73                 DEVICE *io;
  74                 bool running;
  75         } ch[4];
  76         uint8_t mode, status;
  77         bool high_low;
  78         DEVICE *mem;
  79
  80         void write_io8(uint32_t addr, uint32_t data);
  81         uint32_t read_io8(uint32_t addr);
  82         void start(int c);
  83         void finish(int c);
  84         void run(int c);
  85 } dmac_t;
  86
  87 class DISPLAY : public DEVICE
  88 {
  89 private:
  90         Z80 *d_cpu;
  91         DEVICE *d_cmt, *d_pcm, *d_prn;
  92
  93         uint8_t sg_pattern[0x800];
  94         uint8_t font[0x800];
  95         uint8_t vram[0x10000];
  96
  97         int busreq_clocks;
  98         bool color;
  99         bool width40;
 100         uint8_t mode;
 101
 102         crtc_t crtc;
 103         dmac_t dmac;
 104
 105         scrntype_t palette_text_pc[8];
 106         scrntype_t palette_graph_pc[8];
 107         uint8_t text[200][640];
 108         uint8_t graph[200][640];
 109
 110         void update_timing();
 111         void draw_text();
 112         void draw_graph();
 113
 114 public:
 115         DISPLAY(VM_TEMPLATE* parent_vm, EMU* parent_emu) : DEVICE(parent_vm, parent_emu)
 116         {
 117                 for(int i = 0; i < 4; i++) {
 118                         dmac.ch[i].io = parent_vm->dummy;
 119                 }
 120                 dmac.mem = parent_vm->dummy;
 121
 122                 set_device_name(_T("Display"));
 123         }
 124         ~DISPLAY() {}
 125
 126         // common functions
 127         void initialize();
 128         void reset();
 129         void write_io8(uint32_t addr, uint32_t data);
 130         uint32_t read_io8(uint32_t addr);
 131         void write_dma_io8(uint32_t addr, uint32_t data);
 132         void write_signal(int id, uint32_t data, uint32_t mask);
 133         void event_callback(int event_id, int err);
 134         void event_frame();
 135         void event_vline(int v, int clock);
 136         bool process_state(FILEIO* state_fio, bool loading);
 137
 138         // unique functions
 139         void set_context_cpu(Z80* device)
 140         {
 141                 d_cpu = device;
 142         }
 143         void set_context_cmt(DEVICE* device)
 144         {
 145                 d_cmt = device;
 146         }
 147         void set_context_pcm(DEVICE* device)
 148         {
 149                 d_pcm = device;
 150         }
 151         void set_context_prn(DEVICE* device)
 152         {
 153                 d_prn = device;
 154         }
 155         void set_context_dmac_mem(DEVICE* device)
 156         {
 157                 dmac.mem = device;
 158         }
 159         void set_context_dmac_ch0(DEVICE* device)
 160         {
 161                 dmac.ch[0].io = device;
 162         }
 163         void set_context_dmac_ch2(DEVICE* device)
 164         {
 165                 dmac.ch[2].io = device;
 166         }
 167         void draw_screen();
 168 };
 169 }
 170
 171 #endif