mirror of
https://github.com/holub/mame
synced 2025-05-20 12:48:53 +03:00
hp9845: generation of graphic and LP cursors separated. Some
refactoring of LP data computation.
This commit is contained in:
fulivi
parent
e70489f436
commit
88d59894cc
@ -173,6 +173,10 @@
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#define PEN_CURSOR 3 // Graphic cursor
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#define PEN_LP 4 // Light pen cursor
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// Light pen constants
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constexpr unsigned LP_FOV = 9; // Field of view
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constexpr unsigned LP_XOFFSET = 5; // x-offset of LP (due to delay in hit recognition)
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// Peripheral Addresses (PA)
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#define IO_SLOT_FIRST_PA 1
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#define IO_SLOT_LAST_PA 12
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@ -1241,7 +1245,7 @@ INPUT_PORTS_END
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class hp9845ct_state : public hp9845_base_state
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{
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public:
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hp9845ct_state(const machine_config &mconfig, device_type type, const char *tag);
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hp9845ct_state(const machine_config &mconfig, device_type type, const char *tag, unsigned v_total);
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virtual void machine_start() override;
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virtual void machine_reset() override;
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@ -1263,10 +1267,13 @@ protected:
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void update_line_pattern(void);
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static uint16_t get_gv_mem_addr(unsigned x , unsigned y);
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void update_graphic_bits(void);
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int get_lp_cursor_y_top(void) const;
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void render_lp_cursor(unsigned video_scanline , unsigned pen_idx);
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void lp_r4_w(uint16_t data);
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uint16_t lp_r4_r(void);
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void lp_r5_w(uint16_t data);
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bool lp_segment_intersect(unsigned yline) const;
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void compute_lp_data(void);
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bool m_alpha_sel;
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@ -1306,16 +1313,18 @@ protected:
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bool m_gv_lp_sw;
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uint8_t m_gv_lp_reg_cnt;
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bool m_gv_lp_int_en;
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const unsigned m_gv_v_total;
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static const uint16_t m_line_type[];
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static const uint16_t m_area_fill[];
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};
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hp9845ct_state::hp9845ct_state(const machine_config &mconfig, device_type type, const char *tag)
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hp9845ct_state::hp9845ct_state(const machine_config &mconfig, device_type type, const char *tag, unsigned v_total)
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: hp9845_base_state(mconfig , type , tag),
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m_lightpen_x(*this, "LIGHTPENX"),
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m_lightpen_y(*this, "LIGHTPENY"),
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m_lightpen_sw(*this, "GKEY")
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m_lightpen_sw(*this, "GKEY"),
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m_gv_v_total(v_total)
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{
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}
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@ -1549,7 +1558,7 @@ void hp9845ct_state::update_graphic_bits(void)
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// DEBUG DEBUG DEBUG
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static bool last_irq = false;
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if (!last_irq && irq) {
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logerror("GV IRQ 0->1\n");
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logerror("GV IRQ %d %d\n" , m_gv_lp_int_en , m_gv_lp_status);
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}
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last_irq = irq;
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#endif
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@ -1561,6 +1570,53 @@ void hp9845ct_state::update_graphic_bits(void)
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m_ppu->dmar_w(dmar);
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}
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int hp9845ct_state::get_lp_cursor_y_top(void) const
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{
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int wrapped_cursor_y = m_gv_lp_cursor_y;
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if (wrapped_cursor_y >= GVIDEO_VPIXELS && wrapped_cursor_y < m_gv_v_total) {
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wrapped_cursor_y -= m_gv_v_total;
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}
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return wrapped_cursor_y;
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}
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void hp9845ct_state::render_lp_cursor(unsigned video_scanline , unsigned pen_idx)
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{
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int cursor_y_top = get_lp_cursor_y_top();
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bool yw;
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if (m_gv_lp_cursor_fs) {
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yw = true;
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} else {
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yw = (int)video_scanline >= cursor_y_top &&
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(int)video_scanline <= (cursor_y_top + 48);
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}
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if (!yw) {
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return;
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}
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if (!m_gv_lp_cursor_fs && m_gv_lp_cursor_x >= (VIDEO_TOT_HPIXELS + 24)) {
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return;
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}
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bool yc = video_scanline == (cursor_y_top + 24);
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const pen_t &pen = m_palette->pen(pen_idx);
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if (!yc) {
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if (m_gv_lp_cursor_x < VIDEO_TOT_HPIXELS) {
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m_bitmap.pix32(video_scanline , m_gv_lp_cursor_x) = pen;
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}
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} else if (m_gv_lp_cursor_fs) {
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for (unsigned x = 0; x < VIDEO_TOT_HPIXELS; x++) {
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m_bitmap.pix32(video_scanline , x) = pen;
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}
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} else {
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for (unsigned x = std::max(0 , (int)m_gv_lp_cursor_x - 24); x <= (m_gv_lp_cursor_x + 25) && x < VIDEO_TOT_HPIXELS; x++) {
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m_bitmap.pix32(video_scanline , x) = pen;
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}
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}
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}
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void hp9845ct_state::lp_r4_w(uint16_t data)
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{
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if (m_gv_lp_en) {
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@ -1568,12 +1624,6 @@ void hp9845ct_state::lp_r4_w(uint16_t data)
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case 2:
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// LP Y cursor + threshold + interlace + vertical blank interrupt
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m_gv_lp_cursor_y = ((~data >> 6) & 0x1ff);
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#if 0
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if (m_gv_lp_cursor_y < 454)
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m_gv_lp_cursor_y += 24;
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else
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m_gv_lp_cursor_y -= 461;
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#endif
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m_gv_lp_fullbright = BIT(data, 1);
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m_gv_lp_threshold = BIT(data, 3);
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m_gv_lp_interlace = !BIT(data, 4);
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@ -1627,7 +1677,6 @@ uint16_t hp9845ct_state::lp_r4_r(void)
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if (m_gv_lp_sw) {
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BIT_SET(res, 14);
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}
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// TODO: correct?
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if (m_gv_lp_1sthit) {
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BIT_SET(res, 15);
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}
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@ -1650,6 +1699,26 @@ void hp9845ct_state::lp_r5_w(uint16_t data)
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update_graphic_bits();
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}
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bool hp9845ct_state::lp_segment_intersect(unsigned yline) const
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{
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int xp = m_gv_lp_x;
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int yp = m_gv_lp_y;
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int xc = (int)m_gv_lp_cursor_x + 1 - LP_XOFFSET;
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unsigned h = (unsigned)abs((int)yline - yp);
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if (h > LP_FOV) {
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return false;
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}
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int dt = (int)sqrt(LP_FOV * LP_FOV - h * h);
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int ex = xp - dt;
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int fx = xp + dt;
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// Consider [xc..xc+24] segment (i.e. the right-hand side of cursor interlace window)
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return fx >= xc && ex <= (xc + 24);
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}
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void hp9845ct_state::compute_lp_data(void)
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{
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// get LP hit data, returns three words for cmd=6 and one word for cmd=4
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@ -1663,70 +1732,99 @@ void hp9845ct_state::compute_lp_data(void)
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// bit 15 = 1st hit (YHI) = valid hit
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// TODO: check
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m_gv_lp_status = true;
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bool xwindow[ 3 ] = { false , false , false };
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bool ywindow[ 3 ] = { false , false , false };
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uint16_t yhi, xleft, yleft, ylo; // hit coordinates
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uint16_t xp = m_gv_lp_x; // light gun pointer
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uint16_t yp = m_gv_lp_y;
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int yc = get_lp_cursor_y_top() + 24;
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if (m_gv_lp_selftest) {
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int offset = 57 - VIDEO_770_ALPHA_L_LIM;
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m_gv_lp_xwindow = true;
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m_gv_lp_ywindow = true;
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m_gv_lp_data[0] = (~(m_gv_lp_cursor_y + 16)) & 0x1ff; // YHI
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m_gv_lp_data[1] = (~(m_gv_lp_cursor_x + offset)) & 0x3ff; // XLEFT
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m_gv_lp_data[2] = (~(m_gv_lp_cursor_y + 32)) & 0x1ff; // YLO
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constexpr int offset = 57 - VIDEO_770_ALPHA_L_LIM;
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xwindow[ 0 ] = xwindow[ 1 ] = xwindow[ 2 ] = true;
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ywindow[ 0 ] = ywindow[ 1 ] = ywindow[ 2 ] = true;
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yhi = m_gv_lp_cursor_y + 16; // YHI
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xleft = m_gv_lp_cursor_x + offset; // XLEFT
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ylo = m_gv_lp_cursor_y + 32; // YLO
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} else {
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uint8_t fov = 9; // field of view = [cursor - fov, cursor + fov]
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uint16_t xp = m_gv_lp_x; // light gun pointer
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uint16_t yp = m_gv_lp_y;
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uint16_t xc = m_gv_lp_cursor_x + 1; // 9845 light pen crosshair cursor
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uint16_t yc = m_gv_lp_cursor_y + 24;
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uint16_t yhi, xleft, ylo; // hit coordinates
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uint16_t xoffset; // delay for hit detection on horizontal line
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// try to calculate YHI, XLEFT, YLO hit coordinates with respect to LP cursor
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// should give a better match with the prediction algorithm in the firmware
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uint16_t dx = 0, dy = fov;
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xoffset = 14; // longer delay due to bright line
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// if vertical line of the cursor is within field of view, get y delta to intersection
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if (abs(xc - xp) <= fov)
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dy = (uint16_t)sqrt((fov * fov) - ((xc - xp) * (xc - xp)));
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// if horizontal line of the cursor is within field of view, get x delta to intersection
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if (abs(yc - yp) <= fov)
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dx = (uint16_t)sqrt((fov * fov) - ((yc - yp) * (yc - yp)));
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// check whether intersection with vertical line of the cursor is within window
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if ((yp + dy >= yc - 24) && (yp - dy <= yc - 24)) {
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// return the first hit in the window
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yhi = (yp - dy > yc - 24) || !m_gv_lp_interlace ? yp - dy : yc - 24;
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// return the last hit in the window
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ylo = (yp + dy < yc + 24) || !m_gv_lp_interlace ? yp + dy : yc + 24;
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// Hit in a cursor-only part.
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bool yhi_hit = false;
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uint16_t y_top = std::max(0 , (int)yp - (int)LP_FOV);
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// XLEFT: x coordinate of 1st hit in the frame or hit on cursor line
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unsigned dy = abs((int)yp - yc);
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if (dy <= LP_FOV) {
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// Hit on horizontal cursor line
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xleft = (uint16_t)std::max(0 , (int)xp - (int)sqrt(LP_FOV * LP_FOV - dy * dy));
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yleft = yc;
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} else {
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// otherwise return (simulated) first hit in view of field
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yhi = yp - fov;
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ylo = yp + fov;
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// 1st hit in the frame
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dy = abs((int)yp - (int)y_top);
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xleft = (uint16_t)std::max(0 , (int)xp - (int)sqrt(LP_FOV * LP_FOV - dy * dy));
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yleft = y_top;
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}
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// check whether intersection with horizontal line of the cursor is within window
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if ((xp + dx >= xc - 24) && (xp - dx <= xc + 24))
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// return the first hit on the horizontal bar of the cursor
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xleft = (xp - dx > xc - 24) ? xp - dx - fov + xoffset : xp + dx - fov + xoffset;
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else
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// otherwise return (simulated) first hit in view of field
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xleft = xp - fov + xoffset;
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m_gv_lp_data[0] = ~yhi & 0x1ff; // YHI
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m_gv_lp_data[1] = ~xleft & 0x3ff; // XLEFT
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m_gv_lp_data[2] = ~ylo & 0x1ff; // YLO
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xleft += LP_XOFFSET;
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if (m_gv_lp_interlace) {
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m_gv_lp_xwindow = ((xp > (xc - 24)) && (xp < (xc + 24)));
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m_gv_lp_ywindow = ((yp > (yc - 24)) && (yp < (yc + 24)));
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} else {
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m_gv_lp_xwindow = false;
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m_gv_lp_ywindow = false;
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// **** Interlaced mode ****
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unsigned ywd_top = (unsigned)std::max(yc - 24 , 0);
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unsigned ywd_bot = std::min((unsigned)(GVIDEO_VPIXELS - 1) , (unsigned)(yc + 24));
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unsigned even_odd = (unsigned)m_screen->frame_number() & 1;
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// Scan the cursor window [yc-24..yc+24]
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// Only consider each other line. LSB of frame number selects either even-numbered
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// (0) or odd-numbered lines (1).
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for (unsigned line = ywd_top; line <= ywd_bot; line++) {
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if ((line & 1) == even_odd) {
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// YHI: y coordinate of 1st hit in the frame or 1st hit in cursor-only part
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bool curs_hit = lp_segment_intersect(line);
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if (!yhi_hit && curs_hit) {
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yhi = line;
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yhi_hit = true;
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}
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// YLO: y coordinate of last hit in cursor-only part
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if (curs_hit) {
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//logerror("Hit @ %u %u %u-%u\n" , line , even_odd , ywd_top , ywd_bot);
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ylo = line;
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}
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}
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}
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}
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if (!m_gv_lp_interlace || !yhi_hit) {
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// **** Non-interlaced mode ****
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// YHI: y coordinate of 1st hit in the frame
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yhi = y_top;
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// YLO: y coordinate of last hit in the frame
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ylo = std::min((unsigned)(GVIDEO_VPIXELS - 1) , yp + LP_FOV);
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}
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xwindow[ 0 ] = yhi_hit;
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xwindow[ 1 ] = yhi_hit && yleft >= yhi;
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xwindow[ 2 ] = yhi_hit;
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ywindow[ 1 ] = yleft == yc;
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ywindow[ 2 ] = yleft == yc && ylo >= yleft;
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}
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// TODO: debug
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//m_gv_lp_data[0] |= 0x8000;
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if (!m_gv_lp_xwindow) {
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m_gv_lp_data[ 0 ] = ~yhi & 0x1ff; // YHI
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m_gv_lp_data[ 1 ] = ~xleft & 0x3ff; // XLEFT
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m_gv_lp_data[ 2 ] = ~ylo & 0x1ff; // YLO
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if (!xwindow[ 0 ]) {
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BIT_SET(m_gv_lp_data[ 0 ], 13);
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}
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if (!xwindow[ 1 ]) {
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BIT_SET(m_gv_lp_data[ 1 ], 13);
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}
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if (!xwindow[ 2 ]) {
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BIT_SET(m_gv_lp_data[ 2 ], 13);
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}
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if (!m_gv_lp_ywindow) {
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if (!ywindow[ 1 ]) {
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BIT_SET(m_gv_lp_data[ 1 ], 14);
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}
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if (!ywindow[ 2 ]) {
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BIT_SET(m_gv_lp_data[ 2 ], 14);
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}
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if (!m_gv_lp_status) {
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@ -1734,8 +1832,9 @@ void hp9845ct_state::compute_lp_data(void)
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BIT_SET(m_gv_lp_data[ 1 ], 11);
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BIT_SET(m_gv_lp_data[ 2 ], 11);
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}
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LOG(("LP data %d %d %d (%u;%d) (%u;%u) %u %u %u %04x %04x %04x\n" , m_gv_lp_selftest , m_gv_lp_interlace , m_gv_lp_sw , m_gv_lp_cursor_x , yc , m_gv_lp_x , m_gv_lp_y , yhi , xleft , ylo , m_gv_lp_data[ 0 ] , m_gv_lp_data[ 1 ] , m_gv_lp_data[ 2 ]));
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m_gv_lp_1sthit = true;
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LOG(("LP data %d %04x %04x %04x\n" , m_gv_lp_selftest , m_gv_lp_data[ 0 ] , m_gv_lp_data[ 1 ] , m_gv_lp_data[ 2 ]));
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}
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const uint16_t hp9845ct_state::m_line_type[] = {
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@ -1787,7 +1886,7 @@ protected:
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};
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hp9845c_state::hp9845c_state(const machine_config &mconfig, device_type type, const char *tag)
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: hp9845ct_state(mconfig , type , tag)
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: hp9845ct_state(mconfig , type , tag, VIDEO_770_VTOTAL)
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{
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}
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@ -1950,21 +2049,25 @@ TIMER_DEVICE_CALLBACK_MEMBER(hp9845c_state::scanline_timer)
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{
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unsigned video_scanline = param;
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if (m_graphic_sel) {
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if (video_scanline >= VIDEO_770_VBEND && video_scanline < VIDEO_770_VBSTART) {
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graphic_video_render(video_scanline - VIDEO_770_VBEND);
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}
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if (video_scanline < VIDEO_770_VBEND || video_scanline >= VIDEO_770_VBSTART) {
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return;
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}
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if (video_scanline >= VIDEO_770_VBEND && video_scanline < VIDEO_770_VBSTART) {
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unsigned row = (video_scanline - VIDEO_770_VBEND) / VIDEO_CHAR_HEIGHT;
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unsigned line_in_row = (video_scanline - VIDEO_770_VBEND) - row * VIDEO_CHAR_HEIGHT;
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if (line_in_row == 0) {
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// Start of new row, swap buffers
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m_video_buff_idx = !m_video_buff_idx;
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video_fill_buff(!m_video_buff_idx);
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}
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video_render_buff(video_scanline , line_in_row , m_video_buff_idx);
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if (m_graphic_sel) {
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graphic_video_render(video_scanline - VIDEO_770_VBEND);
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}
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unsigned row = (video_scanline - VIDEO_770_VBEND) / VIDEO_CHAR_HEIGHT;
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unsigned line_in_row = (video_scanline - VIDEO_770_VBEND) - row * VIDEO_CHAR_HEIGHT;
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if (line_in_row == 0) {
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// Start of new row, swap buffers
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m_video_buff_idx = !m_video_buff_idx;
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video_fill_buff(!m_video_buff_idx);
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}
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video_render_buff(video_scanline , line_in_row , m_video_buff_idx);
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// Lightpen cursor
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if (m_graphic_sel) {
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render_lp_cursor(video_scanline - VIDEO_770_VBEND , pen_cursor(7));
|
||||
}
|
||||
}
|
||||
|
||||
@ -2045,7 +2148,7 @@ void hp9845c_state::graphic_video_render(unsigned video_scanline)
|
||||
{
|
||||
// video_scanline is 0-based, i.e. the topmost visible line of graphic screen is 0
|
||||
const pen_t *pen = m_palette->pens();
|
||||
bool yc, yw, blink, lp_cursor;
|
||||
bool yc, yw, blink;
|
||||
uint16_t word0, word1, word2;
|
||||
uint8_t pen0, pen1, pen2;
|
||||
|
||||
@ -2056,17 +2159,7 @@ void hp9845c_state::graphic_video_render(unsigned video_scanline)
|
||||
pen1 = ((m_gv_music_memory & 0x002) >> 1) | ((m_gv_music_memory & 0x010) >> 3) | ((m_gv_music_memory & 0x080) >> 5);
|
||||
pen2 = ((m_gv_music_memory & 0x004) >> 2) | ((m_gv_music_memory & 0x020) >> 4) | ((m_gv_music_memory & 0x100) >> 6);
|
||||
|
||||
// 49 pixel lightpen cross hair cursor
|
||||
lp_cursor = (m_gv_lp_cursor_x < VIDEO_TOT_HPIXELS) && (m_gv_lp_cursor_y < GVIDEO_VPIXELS);
|
||||
if (lp_cursor) {
|
||||
yc = video_scanline == (m_gv_lp_cursor_y + 24);
|
||||
if (m_gv_lp_cursor_fs)
|
||||
yw = true;
|
||||
else
|
||||
yw = video_scanline >= m_gv_lp_cursor_y &&
|
||||
video_scanline <= (m_gv_lp_cursor_y + 49);
|
||||
blink = true;
|
||||
} else if (m_gv_cursor_fs) {
|
||||
if (m_gv_cursor_fs) {
|
||||
yw = true;
|
||||
// Steady cursor
|
||||
blink = true;
|
||||
@ -2096,17 +2189,13 @@ void hp9845c_state::graphic_video_render(unsigned video_scanline)
|
||||
bool xw = false;
|
||||
unsigned pixel;
|
||||
|
||||
if (lp_cursor) {
|
||||
// lightpen cursor
|
||||
xc = (x + VIDEO_770_ALPHA_L_LIM) == m_gv_lp_cursor_x;
|
||||
xw = m_gv_lp_cursor_fs || ((x + 24 + VIDEO_770_ALPHA_L_LIM) >= m_gv_lp_cursor_x && (x + VIDEO_770_ALPHA_L_LIM - 25) <= m_gv_lp_cursor_x);
|
||||
} else if (m_gv_cursor_gc) {
|
||||
if (m_gv_cursor_gc) {
|
||||
xc = (x + 61) == m_gv_cursor_x;
|
||||
xw = m_gv_cursor_fs || ((x + 69) > m_gv_cursor_x && (x + 53) < m_gv_cursor_x && ((x + 62) < m_gv_cursor_x || (x + 60) > m_gv_cursor_x));
|
||||
}
|
||||
if (blink && ((xw && yc) || (yw && xc && (m_gv_cursor_gc || lp_cursor)))) {
|
||||
// Cursor (LP cursor is white)
|
||||
pixel = lp_cursor ? pen_cursor(7) : pen_cursor(m_gv_cursor_color);
|
||||
if (blink && ((xw && yc) || (yw && xc && m_gv_cursor_gc))) {
|
||||
// Cursor
|
||||
pixel = pen_cursor(m_gv_cursor_color);
|
||||
} else {
|
||||
// Normal pixel
|
||||
pixel = pen_graphic(((word0 & mask) ? pen0 : 0) | ((word1 & mask) ? pen1 : 0) | ((word2 & mask) ? pen2 : 0));
|
||||
|
||||
Loading…
Reference in New Issue
Block a user