diff options
Diffstat (limited to 'src/devices/bus/isa/cga.cpp')
-rw-r--r-- | src/devices/bus/isa/cga.cpp | 690 |
1 files changed, 346 insertions, 344 deletions
diff --git a/src/devices/bus/isa/cga.cpp b/src/devices/bus/isa/cga.cpp index ff30f3690ad..52a0407f065 100644 --- a/src/devices/bus/isa/cga.cpp +++ b/src/devices/bus/isa/cga.cpp @@ -469,47 +469,43 @@ isa8_cga_superimpose_device::isa8_cga_superimpose_device(const machine_config &m template<bool blink, bool si, bool comp, bool alt, int width> MC6845_UPDATE_ROW( isa8_cga_device::cga_text ) { - uint8_t *videoram = &m_vram[m_start_offset]; - uint32_t *p = &bitmap.pix32(y); - const rgb_t *palette = m_palette->palette()->entry_list_raw(); - int i; + uint8_t const *const videoram = &m_vram[m_start_offset]; + uint32_t *p = &bitmap.pix(y); + rgb_t const *const palette = m_palette->palette()->entry_list_raw(); - if ( y == 0 ) CGA_LOG(1,"cga_text_8",("\n")); - for ( i = 0; i < x_count; i++ ) + if (y == 0) CGA_LOG(1,"cga_text_8",("\n")); + for (int i = 0; i < x_count; i++) { - uint16_t offset = ( ( ma + i ) << 1 ) & 0x3fff; - uint8_t chr = videoram[ offset ]; - uint8_t attr = videoram[ offset +1 ]; - uint8_t data = m_chr_gen[ chr * width + ra ]; + uint16_t const offset = ((ma + i) << 1) & 0x3fff; + uint8_t const chr = videoram[offset]; + uint8_t const attr = videoram[offset +1]; + uint8_t data = m_chr_gen[chr * width + ra]; uint16_t fg, bg; - uint8_t xi; - if ( comp ) + if (comp) { - fg = 0x10 + ( attr & 0x0F ); - bg = alt ? 0 : ( 0x10 + ( ( attr >> 4 ) & 0x07 ) ); + fg = 0x10 + (attr & 0x0f); + bg = alt ? 0 : (0x10 + ((attr >> 4) & 0x07)); } else { fg = attr & 0x0F; - bg = alt ? 0 : ( ( attr >> 4 ) & ( blink ? 0x07 : 0x0f ) ); + bg = alt ? 0 : ((attr >> 4) & (blink ? 0x07 : 0x0f)); } - if ( ( i == cursor_x ) && ( m_framecnt & 0x08 ) ) - data = 0xFF; - else if ( blink && ( attr & 0x80 ) && ( m_framecnt & 0x10 ) ) + if ((i == cursor_x) && (m_framecnt & 0x08)) + data = 0xff; + else if (blink && (attr & 0x80) && (m_framecnt & 0x10)) { data = 0x00; - bg = ( attr >> 4 ) & 0x07; + bg = (attr >> 4) & 0x07; } - for(xi=0;xi<8;xi++) + for (int xi = 0; xi < 8; xi++) { - uint8_t pen_data, dot; - - dot = (data & (1 << (7-xi))); - pen_data = dot ? fg : bg; - if(!si || (pen_data || dot)) + uint8_t const dot = (data & (1 << (7 - xi))); + uint8_t const pen_data = dot ? fg : bg; + if (!si || (pen_data || dot)) *p = palette[pen_data]; p++; } @@ -521,28 +517,29 @@ MC6845_UPDATE_ROW( isa8_cga_device::cga_text ) MC6845_UPDATE_ROW( isa8_cga_device::cga_gfx_4bppl_update_row ) { - uint8_t *videoram = &m_vram[m_start_offset]; - uint32_t *p = &bitmap.pix32(y); - const rgb_t *palette = m_palette->palette()->entry_list_raw(); - int i; + uint8_t const *const videoram = &m_vram[m_start_offset]; + uint32_t *p = &bitmap.pix(y); + rgb_t const *const palette = m_palette->palette()->entry_list_raw(); - if ( y == 0 ) CGA_LOG(1,"cga_gfx_4bppl_update_row",("\n")); - for ( i = 0; i < x_count; i++ ) + if (y == 0) CGA_LOG(1,"cga_gfx_4bppl_update_row",("\n")); + for (int i = 0; i < x_count; i++) { - uint16_t offset = ( ( ( ma + i ) << 1 ) & 0x1fff ) | ( ( y & 1 ) << 13 ); - uint8_t data = videoram[ offset ]; + uint16_t const offset = (((ma + i) << 1) & 0x1fff) | ((y & 1) << 13); + uint8_t data; + + data = videoram[offset]; - *p = palette[data >> 4]; p++; - *p = palette[data >> 4]; p++; - *p = palette[data & 0x0F]; p++; - *p = palette[data & 0x0F]; p++; + *p++ = palette[data >> 4]; + *p++ = palette[data >> 4]; + *p++ = palette[data & 0x0f]; + *p++ = palette[data & 0x0f]; - data = videoram[ offset + 1 ]; + data = videoram[offset + 1]; - *p = palette[data >> 4]; p++; - *p = palette[data >> 4]; p++; - *p = palette[data & 0x0F]; p++; - *p = palette[data & 0x0F]; p++; + *p++ = palette[data >> 4]; + *p++ = palette[data >> 4]; + *p++ = palette[data & 0x0f]; + *p++ = palette[data & 0x0f]; } } @@ -580,37 +577,37 @@ static const uint8_t yc_lut[16][8] = MC6845_UPDATE_ROW( isa8_cga_device::cga_gfx_4bpph_update_row ) { - uint8_t *videoram = &m_vram[m_start_offset]; - uint32_t *p = &bitmap.pix32(y); - const rgb_t *palette = m_palette->palette()->entry_list_raw(); - int i; - - if ( y == 0 ) CGA_LOG(1,"cga_gfx_4bpph_update_row",("\n")); + uint8_t const *const videoram = &m_vram[m_start_offset]; + uint32_t *p = &bitmap.pix(y); + rgb_t const *const palette = m_palette->palette()->entry_list_raw(); - for ( i = 0; i < x_count; i++ ) + if (y == 0) CGA_LOG(1,"cga_gfx_4bpph_update_row",("\n")); + for (int i = 0; i < x_count; i++) { - uint16_t offset = ( ( ( ma + i ) << 1 ) & 0x1fff ) | ( ( y & 1 ) << 13 ); - uint8_t data = videoram[ offset ]; - - *p = palette[data >> 4]; p++; - *p = palette[data >> 4]; p++; - *p = palette[data >> 4]; p++; - *p = palette[data >> 4]; p++; - *p = palette[data & 0x0F]; p++; - *p = palette[data & 0x0F]; p++; - *p = palette[data & 0x0F]; p++; - *p = palette[data & 0x0F]; p++; - - data = videoram[ offset + 1 ]; - - *p = palette[data >> 4]; p++; - *p = palette[data >> 4]; p++; - *p = palette[data >> 4]; p++; - *p = palette[data >> 4]; p++; - *p = palette[data & 0x0F]; p++; - *p = palette[data & 0x0F]; p++; - *p = palette[data & 0x0F]; p++; - *p = palette[data & 0x0F]; p++; + uint16_t const offset = (((ma + i) << 1) & 0x1fff) | ((y & 1) << 13); + uint8_t data; + + data = videoram[offset]; + + *p++ = palette[data >> 4]; + *p++ = palette[data >> 4]; + *p++ = palette[data >> 4]; + *p++ = palette[data >> 4]; + *p++ = palette[data & 0x0f]; + *p++ = palette[data & 0x0f]; + *p++ = palette[data & 0x0f]; + *p++ = palette[data & 0x0f]; + + data = videoram[offset + 1]; + + *p++ = palette[data >> 4]; + *p++ = palette[data >> 4]; + *p++ = palette[data >> 4]; + *p++ = palette[data >> 4]; + *p++ = palette[data & 0x0f]; + *p++ = palette[data & 0x0f]; + *p++ = palette[data & 0x0f]; + *p++ = palette[data & 0x0f]; } } @@ -623,28 +620,29 @@ MC6845_UPDATE_ROW( isa8_cga_device::cga_gfx_4bpph_update_row ) MC6845_UPDATE_ROW( isa8_cga_device::cga_gfx_2bpp_update_row ) { - uint8_t *videoram = &m_vram[m_start_offset]; - uint32_t *p = &bitmap.pix32(y); - const rgb_t *palette = m_palette->palette()->entry_list_raw(); - int i; + uint8_t const *const videoram = &m_vram[m_start_offset]; + uint32_t *p = &bitmap.pix(y); + rgb_t const *const palette = m_palette->palette()->entry_list_raw(); - if ( y == 0 ) CGA_LOG(1,"cga_gfx_2bpp_update_row",("\n")); - for ( i = 0; i < x_count; i++ ) + if (y == 0) CGA_LOG(1,"cga_gfx_2bpp_update_row",("\n")); + for (int i = 0; i < x_count; i++) { - uint16_t offset = ( ( ( ma + i ) << 1 ) & 0x1fff ) | ( ( ra & 1 ) << 13 ); - uint8_t data = videoram[ offset ]; + uint16_t const offset = (((ma + i) << 1) & 0x1fff) | ((ra & 1) << 13); + uint8_t data; + + data = videoram[offset]; - *p = palette[m_palette_lut_2bpp[ ( data >> 6 ) & 0x03 ]]; p++; - *p = palette[m_palette_lut_2bpp[ ( data >> 4 ) & 0x03 ]]; p++; - *p = palette[m_palette_lut_2bpp[ ( data >> 2 ) & 0x03 ]]; p++; - *p = palette[m_palette_lut_2bpp[ data & 0x03 ]]; p++; + *p++ = palette[m_palette_lut_2bpp[(data >> 6) & 0x03]]; + *p++ = palette[m_palette_lut_2bpp[(data >> 4) & 0x03]]; + *p++ = palette[m_palette_lut_2bpp[(data >> 2) & 0x03]]; + *p++ = palette[m_palette_lut_2bpp[ data & 0x03]]; - data = videoram[ offset+1 ]; + data = videoram[offset + 1]; - *p = palette[m_palette_lut_2bpp[ ( data >> 6 ) & 0x03 ]]; p++; - *p = palette[m_palette_lut_2bpp[ ( data >> 4 ) & 0x03 ]]; p++; - *p = palette[m_palette_lut_2bpp[ ( data >> 2 ) & 0x03 ]]; p++; - *p = palette[m_palette_lut_2bpp[ data & 0x03 ]]; p++; + *p++ = palette[m_palette_lut_2bpp[(data >> 6) & 0x03]]; + *p++ = palette[m_palette_lut_2bpp[(data >> 4) & 0x03]]; + *p++ = palette[m_palette_lut_2bpp[(data >> 2) & 0x03]]; + *p++ = palette[m_palette_lut_2bpp[ data & 0x03]]; } } @@ -658,37 +656,38 @@ MC6845_UPDATE_ROW( isa8_cga_device::cga_gfx_2bpp_update_row ) MC6845_UPDATE_ROW( isa8_cga_device::cga_gfx_1bpp_update_row ) { - uint8_t *videoram = &m_vram[m_start_offset]; - uint32_t *p = &bitmap.pix32(y); - const rgb_t *palette = m_palette->palette()->entry_list_raw(); - uint8_t fg = m_color_select & 0x0F; - int i; + uint8_t const *const videoram = &m_vram[m_start_offset]; + uint32_t *p = &bitmap.pix(y); + rgb_t const *const palette = m_palette->palette()->entry_list_raw(); + uint8_t const fg = m_color_select & 0x0f; - if ( y == 0 ) CGA_LOG(1,"cga_gfx_1bpp_update_row",("\n")); - for ( i = 0; i < x_count; i++ ) + if (y == 0) CGA_LOG(1,"cga_gfx_1bpp_update_row",("\n")); + for (int i = 0; i < x_count; i++) { - uint16_t offset = ( ( ( ma + i ) << 1 ) & 0x1fff ) | ( ( ra & 1 ) << 13 ); - uint8_t data = videoram[ offset ]; - - *p = palette[( data & 0x80 ) ? fg : 0]; p++; - *p = palette[( data & 0x40 ) ? fg : 0]; p++; - *p = palette[( data & 0x20 ) ? fg : 0]; p++; - *p = palette[( data & 0x10 ) ? fg : 0]; p++; - *p = palette[( data & 0x08 ) ? fg : 0]; p++; - *p = palette[( data & 0x04 ) ? fg : 0]; p++; - *p = palette[( data & 0x02 ) ? fg : 0]; p++; - *p = palette[( data & 0x01 ) ? fg : 0]; p++; - - data = videoram[ offset + 1 ]; - - *p = palette[( data & 0x80 ) ? fg : 0]; p++; - *p = palette[( data & 0x40 ) ? fg : 0]; p++; - *p = palette[( data & 0x20 ) ? fg : 0]; p++; - *p = palette[( data & 0x10 ) ? fg : 0]; p++; - *p = palette[( data & 0x08 ) ? fg : 0]; p++; - *p = palette[( data & 0x04 ) ? fg : 0]; p++; - *p = palette[( data & 0x02 ) ? fg : 0]; p++; - *p = palette[( data & 0x01 ) ? fg : 0]; p++; + uint16_t const offset = (((ma + i) << 1) & 0x1fff) | ((ra & 1) << 13); + uint8_t data; + + data = videoram[offset]; + + *p++ = palette[(data & 0x80) ? fg : 0]; + *p++ = palette[(data & 0x40) ? fg : 0]; + *p++ = palette[(data & 0x20) ? fg : 0]; + *p++ = palette[(data & 0x10) ? fg : 0]; + *p++ = palette[(data & 0x08) ? fg : 0]; + *p++ = palette[(data & 0x04) ? fg : 0]; + *p++ = palette[(data & 0x02) ? fg : 0]; + *p++ = palette[(data & 0x01) ? fg : 0]; + + data = videoram[offset + 1]; + + *p++ = palette[(data & 0x80) ? fg : 0]; + *p++ = palette[(data & 0x40) ? fg : 0]; + *p++ = palette[(data & 0x20) ? fg : 0]; + *p++ = palette[(data & 0x10) ? fg : 0]; + *p++ = palette[(data & 0x08) ? fg : 0]; + *p++ = palette[(data & 0x04) ? fg : 0]; + *p++ = palette[(data & 0x02) ? fg : 0]; + *p++ = palette[(data & 0x01) ? fg : 0]; } } @@ -961,205 +960,200 @@ void isa8_cga_device::io_write(offs_t offset, uint8_t data) // proc = cga_pgfx_4bpp; // -//static inline void pgfx_plot_unit_4bpp(bitmap_ind16 &bitmap, -// int x, int y, int offs) -//{ -// int color, values[2]; -// int i; -// -// if (cga.plantronics & 0x40) -// { -// values[0] = videoram[offs | 0x4000]; -// values[1] = videoram[offs]; -// } -// else -// { -// values[0] = videoram[offs]; -// values[1] = videoram[offs | 0x4000]; -// } -// for (i=3; i>=0; i--) -// { -// color = ((values[0] & 0x3) << 1) | -// ((values[1] & 2) >> 1) | -// ((values[1] & 1) << 3); -// bitmap.pix16(y, x+i) = Machine->pens[color]; -// values[0]>>=2; -// values[1]>>=2; -// } -//} -// -// -// +#if 0 +static inline void pgfx_plot_unit_4bpp(bitmap_ind16 &bitmap, int x, int y, int offs) +{ + int values[2]; + + if (cga.plantronics & 0x40) + { + values[0] = videoram[offs | 0x4000]; + values[1] = videoram[offs]; + } + else + { + values[0] = videoram[offs]; + values[1] = videoram[offs | 0x4000]; + } + for (int i = 3; i >= 0; i--) + { + int const color = + ((values[0] & 0x3) << 1) | + ((values[1] & 2) >> 1) | + ((values[1] & 1) << 3); + bitmap.pix(y, x + i) = Machine->pens[color]; + values[0] >>= 2; + values[1] >>= 2; + } +} +#endif + + ///*************************************************************************** // Draw graphics mode with 640x200 pixels (default) with 2 bits/pixel. // Even scanlines are from CGA_base + 0x0000, odd from CGA_base + 0x2000 // Second plane at CGA_base + 0x4000 / 0x6000 -//***************************************************************************/ -// -//static void cga_pgfx_4bpp(bitmap_ind16 &bitmap, struct mscrtc6845 *crtc) -//{ -// int i, sx, sy, sh; -// int offs = mscrtc6845_get_start(crtc)*2; -// int lines = mscrtc6845_get_char_lines(crtc); -// int height = mscrtc6845_get_char_height(crtc); -// int columns = mscrtc6845_get_char_columns(crtc)*2; -// -// for (sy=0; sy<lines; sy++,offs=(offs+columns)&0x1fff) -// { -// for (sh=0; sh<height; sh++, offs|=0x2000) -// { -// // char line 0 used as a12 line in graphic mode -// if (!(sh & 1)) -// { -// for (i=offs, sx=0; sx<columns; sx++, i=(i+1)&0x1fff) -// { -// pgfx_plot_unit_4bpp(bitmap, sx*4, sy*height+sh, i); -// } -// } -// else -// { -// for (i=offs|0x2000, sx=0; sx<columns; sx++, i=((i+1)&0x1fff)|0x2000) -// { -// pgfx_plot_unit_4bpp(bitmap, sx*4, sy*height+sh, i); -// } -// } -// } -// } -//} -// -// -// -//static inline void pgfx_plot_unit_2bpp(bitmap_ind16 &bitmap, -// int x, int y, const uint16_t *palette, int offs) -//{ -// int i; -// uint8_t bmap[2], values[2]; -// uint16_t *dest; -// -// if (cga.plantronics & 0x40) -// { -// values[0] = videoram[offs]; -// values[1] = videoram[offs | 0x4000]; -// } -// else -// { -// values[0] = videoram[offs | 0x4000]; -// values[1] = videoram[offs]; -// } -// bmap[0] = bmap[1] = 0; -// for (i=3; i>=0; i--) -// { -// bmap[0] = bmap[0] << 1; if (values[0] & 0x80) bmap[0] |= 1; -// bmap[0] = bmap[0] << 1; if (values[1] & 0x80) bmap[0] |= 1; -// bmap[1] = bmap[1] << 1; if (values[0] & 0x08) bmap[1] |= 1; -// bmap[1] = bmap[1] << 1; if (values[1] & 0x08) bmap[1] |= 1; -// values[0] = values[0] << 1; -// values[1] = values[1] << 1; -// } -// -// dest = &bitmap.pix16(y, x); -// *(dest++) = palette[(bmap[0] >> 6) & 0x03]; -// *(dest++) = palette[(bmap[0] >> 4) & 0x03]; -// *(dest++) = palette[(bmap[0] >> 2) & 0x03]; -// *(dest++) = palette[(bmap[0] >> 0) & 0x03]; -// *(dest++) = palette[(bmap[1] >> 6) & 0x03]; -// *(dest++) = palette[(bmap[1] >> 4) & 0x03]; -// *(dest++) = palette[(bmap[1] >> 2) & 0x03]; -// *(dest++) = palette[(bmap[1] >> 0) & 0x03]; -//} -// -// -// +//**************************************************************************** + +#if 0 +static void cga_pgfx_4bpp(bitmap_ind16 &bitmap, struct mscrtc6845 *crtc) +{ + int offs = mscrtc6845_get_start(crtc) * 2; + int const lines = mscrtc6845_get_char_lines(crtc); + int const height = mscrtc6845_get_char_height(crtc); + int columns = mscrtc6845_get_char_columns(crtc) * 2; + + for (int sy = 0; sy < lines; sy++, offs = (offs + columns) & 0x1fff) + { + for (int sh = 0; sh < height; sh++, offs |= 0x2000) + { + // char line 0 used as a12 line in graphic mode + if (!(sh & 1)) + { + for (int i = offs, sx = 0; sx < columns; sx++, i = (i + 1) & 0x1fff) + { + pgfx_plot_unit_4bpp(bitmap, sx * 4, sy * height + sh, i); + } + } + else + { + for (int i = offs | 0x2000, sx = 0; sx < columns; sx++, i = ((i + 1) & 0x1fff) | 0x2000) + { + pgfx_plot_unit_4bpp(bitmap, sx * 4, sy * height + sh, i); + } + } + } + } +} +#endif + + +#if 0 +static inline void pgfx_plot_unit_2bpp(bitmap_ind16 &bitmap, int x, int y, const uint16_t *palette, int offs) +{ + uint8_t values[2]; + if (cga.plantronics & 0x40) + { + values[0] = videoram[offs]; + values[1] = videoram[offs | 0x4000]; + } + else + { + values[0] = videoram[offs | 0x4000]; + values[1] = videoram[offs]; + } + uint8_t bmap[2] = { 0, 0 }; + for (int i = 3; i >= 0; i--) + { + bmap[0] = (bmap[0] << 1) | BIT(values[0], 7); + bmap[0] = (bmap[0] << 1) | BIT(values[1], 7); + bmap[1] = (bmap[1] << 1) | BIT(values[0], 3); + bmap[1] = (bmap[1] << 1) | BIT(values[1], 3); + values[0] <<= 1; + values[1] <<= 1; + } + + uint16_t *dest = &bitmap.pix(y, x); + *dest++ = palette[(bmap[0] >> 6) & 0x03]; + *dest++ = palette[(bmap[0] >> 4) & 0x03]; + *dest++ = palette[(bmap[0] >> 2) & 0x03]; + *dest++ = palette[(bmap[0] >> 0) & 0x03]; + *dest++ = palette[(bmap[1] >> 6) & 0x03]; + *dest++ = palette[(bmap[1] >> 4) & 0x03]; + *dest++ = palette[(bmap[1] >> 2) & 0x03]; + *dest++ = palette[(bmap[1] >> 0) & 0x03]; +} +#endif + + ///*************************************************************************** // Draw graphics mode with 320x200 pixels (default) with 2 bits/pixel. // Even scanlines are from CGA_base + 0x0000, odd from CGA_base + 0x2000 // cga fetches 2 byte per mscrtc6845 access (not modeled here)! -//***************************************************************************/ -// -//static void cga_pgfx_2bpp(bitmap_ind16 &bitmap, struct mscrtc6845 *crtc) -//{ -// int i, sx, sy, sh; -// int offs = mscrtc6845_get_start(crtc)*2; -// int lines = mscrtc6845_get_char_lines(crtc); -// int height = mscrtc6845_get_char_height(crtc); -// int columns = mscrtc6845_get_char_columns(crtc)*2; -// int colorset = cga.color_select & 0x3F; -// const uint16_t *palette; -// -// /* Most chipsets use bit 2 of the mode control register to -// * access a third palette. But not consistently. */ -// pc_cga_check_palette(); -// switch(CGA_CHIPSET) -// { -// /* The IBM Professional Graphics Controller behaves like -// * the PC1512, btw. */ -// case CGA_CHIPSET_PC1512: -// if ((colorset < 32) && (cga.mode_control & 4)) colorset += 64; -// break; -// -// case CGA_CHIPSET_IBM: -// case CGA_CHIPSET_PC200: -// case CGA_CHIPSET_ATI: -// case CGA_CHIPSET_PARADISE: -// if (cga.mode_control & 4) colorset = (colorset & 0x1F) + 64; -// break; -// } -// -// -// /* The fact that our palette is located in cga_colortable is a vestigial -// * aspect from when we were doing that ugly trick where drawgfx() would -// * handle graphics drawing. Truthfully, we should probably be using -// * palette_set_color_rgb() here and not doing the palette lookup in the loop -// */ -// palette = &cga_colortable[256*2 + 16*2] + colorset * 4; -// -// for (sy=0; sy<lines; sy++,offs=(offs+columns)&0x1fff) { -// -// for (sh=0; sh<height; sh++) -// { -// if (!(sh&1)) { // char line 0 used as a12 line in graphic mode -// for (i=offs, sx=0; sx<columns; sx++, i=(i+1)&0x1fff) -// { -// pgfx_plot_unit_2bpp(bitmap, sx*8, sy*height+sh, palette, i); -// } -// } -// else -// { -// for (i=offs|0x2000, sx=0; sx<columns; sx++, i=((i+1)&0x1fff)|0x2000) -// { -// pgfx_plot_unit_2bpp(bitmap, sx*8, sy*height+sh, palette, i); -// } -// } -// } -// } -//} +//**************************************************************************** + +#if 0 +static void cga_pgfx_2bpp(bitmap_ind16 &bitmap, struct mscrtc6845 *crtc) +{ + int offs = mscrtc6845_get_start(crtc) * 2; + int const lines = mscrtc6845_get_char_lines(crtc); + int const height = mscrtc6845_get_char_height(crtc); + int const columns = mscrtc6845_get_char_columns(crtc) * 2; + + /* Most chipsets use bit 2 of the mode control register to access a third palette. But not consistently. */ + int colorset = cga.color_select & 0x3f; + pc_cga_check_palette(); + switch (CGA_CHIPSET) + { + /* The IBM Professional Graphics Controller behaves like the PC1512, btw. */ + case CGA_CHIPSET_PC1512: + if ((colorset < 32) && (cga.mode_control & 4)) colorset += 64; + break; + + case CGA_CHIPSET_IBM: + case CGA_CHIPSET_PC200: + case CGA_CHIPSET_ATI: + case CGA_CHIPSET_PARADISE: + if (cga.mode_control & 4) colorset = (colorset & 0x1f) + 64; + break; + } + + /* The fact that our palette is located in cga_colortable is a vestigial + * aspect from when we were doing that ugly trick where drawgfx() would + * handle graphics drawing. Truthfully, we should probably be using + * palette_set_color_rgb() here and not doing the palette lookup in the loop + */ + uint16_t const *const palette = &cga_colortable[256*2 + 16*2] + colorset * 4; + + for (int sy = 0; sy < lines; sy++, offs = (offs + columns) & 0x1fff) + { + + for (int sh = 0; sh < height; sh++) + { + if (!(sh & 1)) // char line 0 used as a12 line in graphic mode + { + for (int i = offs, sx = 0; sx < columns; sx++, i = (i + 1) & 0x1fff) + { + pgfx_plot_unit_2bpp(bitmap, sx * 8, sy * height + sh, palette, i); + } + } + else + { + for (int i = offs | 0x2000, sx = 0; sx < columns; sx++, i= ((i + 1) & 0x1fff) | 0x2000) + { + pgfx_plot_unit_2bpp(bitmap, sx * 8, sy * height + sh, palette, i); + } + } + } + } +} +#endif MC6845_UPDATE_ROW( isa8_cga_pc1512_device::pc1512_gfx_4bpp_update_row ) { - uint8_t *videoram = &m_vram[m_start_offset]; - uint32_t *p = &bitmap.pix32(y); - const rgb_t *palette = m_palette->palette()->entry_list_raw(); - uint16_t offset_base = ra << 13; - int j; + uint8_t const *const videoram = &m_vram[m_start_offset]; + uint32_t *p = &bitmap.pix(y); + rgb_t const *const palette = m_palette->palette()->entry_list_raw(); + uint16_t const offset_base = ra << 13; - if ( y == 0 ) CGA_LOG(1,"pc1512_gfx_4bpp_update_row",("\n")); - for ( j = 0; j < x_count; j++ ) + if (y == 0) CGA_LOG(1,"pc1512_gfx_4bpp_update_row",("\n")); + for (int j = 0; j < x_count; j++) { - uint16_t offset = offset_base | ( ( ma + j ) & 0x1FFF ); - uint16_t i = ( m_color_select & 8 ) ? videoram[ isa8_cga_pc1512_device::vram_offset[3] | offset ] << 3 : 0; - uint16_t r = ( m_color_select & 4 ) ? videoram[ isa8_cga_pc1512_device::vram_offset[2] | offset ] << 2 : 0; - uint16_t g = ( m_color_select & 2 ) ? videoram[ isa8_cga_pc1512_device::vram_offset[1] | offset ] << 1 : 0; - uint16_t b = ( m_color_select & 1 ) ? videoram[ isa8_cga_pc1512_device::vram_offset[0] | offset ] : 0; - - *p = palette[( ( i & 0x400 ) | ( r & 0x200 ) | ( g & 0x100 ) | ( b & 0x80 ) ) >> 7]; p++; - *p = palette[( ( i & 0x200 ) | ( r & 0x100 ) | ( g & 0x080 ) | ( b & 0x40 ) ) >> 6]; p++; - *p = palette[( ( i & 0x100 ) | ( r & 0x080 ) | ( g & 0x040 ) | ( b & 0x20 ) ) >> 5]; p++; - *p = palette[( ( i & 0x080 ) | ( r & 0x040 ) | ( g & 0x020 ) | ( b & 0x10 ) ) >> 4]; p++; - *p = palette[( ( i & 0x040 ) | ( r & 0x020 ) | ( g & 0x010 ) | ( b & 0x08 ) ) >> 3]; p++; - *p = palette[( ( i & 0x020 ) | ( r & 0x010 ) | ( g & 0x008 ) | ( b & 0x04 ) ) >> 2]; p++; - *p = palette[( ( i & 0x010 ) | ( r & 0x008 ) | ( g & 0x004 ) | ( b & 0x02 ) ) >> 1]; p++; - *p = palette[ ( i & 0x008 ) | ( r & 0x004 ) | ( g & 0x002 ) | ( b & 0x01 ) ]; p++; + uint16_t const offset = offset_base | ((ma + j) & 0x1fff); + uint16_t const i = (m_color_select & 8) ? videoram[isa8_cga_pc1512_device::vram_offset[3] | offset] << 3 : 0; + uint16_t const r = (m_color_select & 4) ? videoram[isa8_cga_pc1512_device::vram_offset[2] | offset] << 2 : 0; + uint16_t const g = (m_color_select & 2) ? videoram[isa8_cga_pc1512_device::vram_offset[1] | offset] << 1 : 0; + uint16_t const b = (m_color_select & 1) ? videoram[isa8_cga_pc1512_device::vram_offset[0] | offset] : 0; + + *p++ = palette[((i & 0x400) | (r & 0x200) | (g & 0x100) | (b & 0x80) ) >> 7]; + *p++ = palette[((i & 0x200) | (r & 0x100) | (g & 0x080) | (b & 0x40) ) >> 6]; + *p++ = palette[((i & 0x100) | (r & 0x080) | (g & 0x040) | (b & 0x20) ) >> 5]; + *p++ = palette[((i & 0x080) | (r & 0x040) | (g & 0x020) | (b & 0x10) ) >> 4]; + *p++ = palette[((i & 0x040) | (r & 0x020) | (g & 0x010) | (b & 0x08) ) >> 3]; + *p++ = palette[((i & 0x020) | (r & 0x010) | (g & 0x008) | (b & 0x04) ) >> 2]; + *p++ = palette[((i & 0x010) | (r & 0x008) | (g & 0x004) | (b & 0x02) ) >> 1]; + *p++ = palette[ (i & 0x008) | (r & 0x004) | (g & 0x002) | (b & 0x01) ]; } } @@ -1500,31 +1494,38 @@ void isa8_wyse700_device::device_reset() uint32_t isa8_wyse700_device::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect) { - if (m_control & 0x08) { - const rgb_t *palette = m_palette->palette()->entry_list_raw(); - uint8_t fg = m_color_select & 0x0F; + if (m_control & 0x08) + { + rgb_t const *const palette = m_palette->palette()->entry_list_raw(); + uint8_t const fg = m_color_select & 0x0F; uint32_t addr = 0; - for (int y = 0; y < 800; y++) { - uint8_t *src = &m_vram[addr]; + for (int y = 0; y < 800; y++) + { + uint8_t const *src = &m_vram[addr]; - if (y & 1) { + if (y & 1) + { src += 0x10000; addr += 160; } - for (int x = 0; x < (1280 / 8); x++) { + for (int x = 0; x < (1280 / 8); x++) + { uint8_t val = src[x]; - for (int i = 0; i < 8; i++) { - bitmap.pix32(y,x*8+i) = (val & 0x80) ? palette[fg] : palette[0x00]; + for (int i = 0; i < 8; i++) + { + bitmap.pix(y, x * 8 + i) = (val & 0x80) ? palette[fg] : palette[0x00]; val <<= 1; } } } - } else { + return 0; + } + else + { return isa8_cga_device::screen_update(screen, bitmap, cliprect); } - return 0; } @@ -1837,7 +1838,7 @@ uint8_t isa8_cga_m24_device::io_read(offs_t offset) MC6845_UPDATE_ROW(isa8_cga_m24_device::crtc_update_row) { - if(m_mode2 & 1) + if (m_mode2 & 1) { m24_gfx_1bpp_m24_update_row(bitmap, cliprect, ma, ra, y, x_count, cursor_x, de, hbp, vbp); return; @@ -1847,7 +1848,7 @@ MC6845_UPDATE_ROW(isa8_cga_m24_device::crtc_update_row) return; y = m_y; - if(m_y >= bitmap.height()) + if (m_y >= bitmap.height()) return; switch (m_update_row_type) @@ -1885,37 +1886,38 @@ MC6845_UPDATE_ROW(isa8_cga_m24_device::crtc_update_row) MC6845_UPDATE_ROW( isa8_cga_m24_device::m24_gfx_1bpp_m24_update_row ) { - uint8_t *videoram = &m_vram[m_start_offset]; - uint32_t *p = &bitmap.pix32(y); - const rgb_t *palette = m_palette->palette()->entry_list_raw(); - uint8_t fg = m_color_select & 0x0F; - int i; + uint8_t const *const videoram = &m_vram[m_start_offset]; + uint32_t *p = &bitmap.pix(y); + rgb_t const *const palette = m_palette->palette()->entry_list_raw(); + uint8_t const fg = m_color_select & 0x0f; - if ( y == 0 ) CGA_LOG(1,"m24_gfx_1bpp_m24_update_row",("\n")); - for ( i = 0; i < x_count; i++ ) + if (y == 0) CGA_LOG(1,"m24_gfx_1bpp_m24_update_row",("\n")); + for (int i = 0; i < x_count; i++) { - uint16_t offset = ( ( ( ma + i ) << 1 ) & 0x1fff ) | ( ( ra & 3 ) << 13 ); - uint8_t data = videoram[ offset ]; - - *p = palette[( data & 0x80 ) ? fg : 0]; p++; - *p = palette[( data & 0x40 ) ? fg : 0]; p++; - *p = palette[( data & 0x20 ) ? fg : 0]; p++; - *p = palette[( data & 0x10 ) ? fg : 0]; p++; - *p = palette[( data & 0x08 ) ? fg : 0]; p++; - *p = palette[( data & 0x04 ) ? fg : 0]; p++; - *p = palette[( data & 0x02 ) ? fg : 0]; p++; - *p = palette[( data & 0x01 ) ? fg : 0]; p++; - - data = videoram[ offset + 1 ]; - - *p = palette[( data & 0x80 ) ? fg : 0]; p++; - *p = palette[( data & 0x40 ) ? fg : 0]; p++; - *p = palette[( data & 0x20 ) ? fg : 0]; p++; - *p = palette[( data & 0x10 ) ? fg : 0]; p++; - *p = palette[( data & 0x08 ) ? fg : 0]; p++; - *p = palette[( data & 0x04 ) ? fg : 0]; p++; - *p = palette[( data & 0x02 ) ? fg : 0]; p++; - *p = palette[( data & 0x01 ) ? fg : 0]; p++; + uint16_t const offset = (((ma + i) << 1 ) & 0x1fff) | ((ra & 3) << 13); + uint8_t data; + + data = videoram[offset]; + + *p++ = palette[(data & 0x80) ? fg : 0]; + *p++ = palette[(data & 0x40) ? fg : 0]; + *p++ = palette[(data & 0x20) ? fg : 0]; + *p++ = palette[(data & 0x10) ? fg : 0]; + *p++ = palette[(data & 0x08) ? fg : 0]; + *p++ = palette[(data & 0x04) ? fg : 0]; + *p++ = palette[(data & 0x02) ? fg : 0]; + *p++ = palette[(data & 0x01) ? fg : 0]; + + data = videoram[offset + 1]; + + *p++ = palette[(data & 0x80) ? fg : 0]; + *p++ = palette[(data & 0x40) ? fg : 0]; + *p++ = palette[(data & 0x20) ? fg : 0]; + *p++ = palette[(data & 0x10) ? fg : 0]; + *p++ = palette[(data & 0x08) ? fg : 0]; + *p++ = palette[(data & 0x04) ? fg : 0]; + *p++ = palette[(data & 0x02) ? fg : 0]; + *p++ = palette[(data & 0x01) ? fg : 0]; } } |