summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/bus/isa/cga.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/devices/bus/isa/cga.cpp')
-rw-r--r--src/devices/bus/isa/cga.cpp690
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];
}
}