diff options
Diffstat (limited to 'src/mess/video/spectrum.c')
-rw-r--r-- | src/mess/video/spectrum.c | 40 |
1 files changed, 31 insertions, 9 deletions
diff --git a/src/mess/video/spectrum.c b/src/mess/video/spectrum.c index f26edf19cd0..379a7f1a104 100644 --- a/src/mess/video/spectrum.c +++ b/src/mess/video/spectrum.c @@ -39,6 +39,8 @@ VIDEO_START_MEMBER(spectrum_state,spectrum_128) m_previous_border_x = 0; m_previous_border_y = 0; machine().first_screen()->register_screen_bitmap(m_border_bitmap); + + m_screen_location = m_ram->pointer() + (5 << 14); } @@ -58,6 +60,8 @@ void spectrum_state::screen_eof_spectrum(screen_device &screen, bool state) // rising edge if (state) { + spectrum_UpdateBorderBitmap(); + m_frame_number++; if (m_frame_number >= m_frame_invert_count) @@ -65,9 +69,6 @@ void spectrum_state::screen_eof_spectrum(screen_device &screen, bool state) m_frame_number = 0; m_flash_invert = !m_flash_invert; } - - - spectrum_UpdateBorderBitmap(); } } @@ -103,6 +104,10 @@ inline void spectrum_state::spectrum_plot_pixel(bitmap_ind16 &bitmap, int x, int UINT32 spectrum_state::screen_update_spectrum(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { + if (m_border_bitmap.valid()) + copyscrollbitmap(bitmap, m_border_bitmap, 0, 0, 0, 0, cliprect); + +#if 0 // note, don't update borders in here, this can time travel w/regards to other timers and may end up giving you // screen positions earlier than the last write handler gave you @@ -112,9 +117,6 @@ UINT32 spectrum_state::screen_update_spectrum(screen_device &screen, bitmap_ind1 unsigned char *attr, *scr; // int full_refresh = 1; - if (m_border_bitmap.valid()) - copyscrollbitmap(bitmap, m_border_bitmap, 0, 0, 0, 0, cliprect); - scr=m_screen_location; for (y=0; y<192; y++) @@ -149,6 +151,7 @@ UINT32 spectrum_state::screen_update_spectrum(screen_device &screen, bitmap_ind1 attr++; } } +#endif return 0; } @@ -191,14 +194,33 @@ void spectrum_state::spectrum_UpdateBorderBitmap() if (m_border_bitmap.valid()) { - int colour = m_port_fe_data & 0x07; + UINT16 border = m_port_fe_data & 0x07; //printf("update border from %d,%d to %d,%d\n", m_previous_border_x, m_previous_border_y, x, y); do { - UINT16* bm = &m_border_bitmap.pix16(m_previous_border_y); - bm[m_previous_border_x] = colour; + UINT16 scrx = m_previous_border_x - SPEC_LEFT_BORDER; + UINT16 scry = m_previous_border_y - SPEC_TOP_BORDER; + + if (scrx < SPEC_DISPLAY_XSIZE && scry < SPEC_DISPLAY_YSIZE) + { + // this can/must be optimised + if ((scrx & 7) == 0) { + UINT16 *bm = &m_border_bitmap.pix16(m_previous_border_y, m_previous_border_x); + UINT8 attr = *(m_screen_location + ((scry & 0xF8) << 2) + (scrx >> 3) + 0x1800); + UINT8 scr = *(m_screen_location + ((scry & 7) << 8) + ((scry & 0x38) << 2) + ((scry & 0xC0) << 5) + (scrx >> 3)); + UINT16 ink = (attr & 0x07) + ((attr >> 3) & 0x08); + UINT16 pap = (attr >> 3) & 0x0f; + + if (m_flash_invert && (attr & 0x80)) + scr = ~scr; + + for (UINT8 b = 0x80; b != 0; b >>= 1) + *bm++ = (scr & b) ? ink : pap; + } + } else + m_border_bitmap.pix16(m_previous_border_y, m_previous_border_x) = border; m_previous_border_x += 1; |