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Diffstat (limited to 'src/mame/drivers/bml3.cpp')
-rw-r--r--src/mame/drivers/bml3.cpp37
1 files changed, 18 insertions, 19 deletions
diff --git a/src/mame/drivers/bml3.cpp b/src/mame/drivers/bml3.cpp
index 3558439a923..5636185c513 100644
--- a/src/mame/drivers/bml3.cpp
+++ b/src/mame/drivers/bml3.cpp
@@ -575,7 +575,7 @@ INPUT_CHANGED_MEMBER(bml3_state::nmi_button)
MC6845_UPDATE_ROW( bml3_state::crtc_update_row )
{
- const rgb_t *palette = m_palette->palette()->entry_list_raw();
+ rgb_t const *const palette = m_palette->palette()->entry_list_raw();
// The MB-6890 has a 5-bit colour RAM region. The meaning of the bits are:
// 0: blue
// 1: red
@@ -583,13 +583,9 @@ MC6845_UPDATE_ROW( bml3_state::crtc_update_row )
// 3: reverse/inverse video
// 4: graphic (not character)
- u8 x=0,hf=0,xi=0,interlace=0,bgcolor=0,rawbits=0,dots[2]={0,0},color=0,pen=0;
- bool reverse=0,graphic=0,lowres=0;
- u16 mem=0;
-
- interlace = (m_crtc_vreg[8] & 3) ? 1 : 0;
- lowres = BIT(m_hres_reg, 6);
- bgcolor = m_hres_reg & 7;
+ u8 const interlace = (m_crtc_vreg[8] & 3) ? 1 : 0;
+ bool const lowres = BIT(m_hres_reg, 6);
+ u8 const bgcolor = m_hres_reg & 7;
if (interlace)
{
@@ -597,19 +593,21 @@ MC6845_UPDATE_ROW( bml3_state::crtc_update_row )
if (y > 0x191) return;
}
- for(x=0; x<x_count; x++)
+ for(u8 x=0; x<x_count; x++)
{
+ u16 mem;
if (lowres)
mem = (ma + x - 0x400) & 0x3fff;
else
mem = (ma + x + ra * x_count/40 * 0x400 -0x400) & 0x3fff;
- color = m_aram[mem] & 7;
- reverse = BIT(m_aram[mem], 3) ^ (x == cursor_x);
- graphic = BIT(m_aram[mem], 4);
+ u8 const color = m_aram[mem] & 7;
+ bool const reverse = BIT(m_aram[mem], 3) ^ (x == cursor_x);
+ bool const graphic = BIT(m_aram[mem], 4);
- rawbits = m_vram[mem];
+ u8 const rawbits = m_vram[mem];
+ u8 dots[2] = { 0, 0 };
if (graphic)
{
if (lowres)
@@ -629,8 +627,8 @@ MC6845_UPDATE_ROW( bml3_state::crtc_update_row )
else
{
// character mode
- int tile = rawbits & 0x7f;
- int tile_bank = BIT(rawbits, 7);
+ int const tile = rawbits & 0x7f;
+ int const tile_bank = BIT(rawbits, 7);
if (interlace)
{
dots[0] = m_p_chargen[(tile_bank<<11)|(tile<<4)|(ra<<1)];
@@ -642,18 +640,19 @@ MC6845_UPDATE_ROW( bml3_state::crtc_update_row )
}
}
- for(hf=0;hf<=interlace;hf++)
+ for(u8 hf=0;hf<=interlace;hf++)
{
- for(xi=0;xi<8;xi++)
+ for(u8 xi=0;xi<8;xi++)
{
+ u8 pen;
if(reverse)
pen = (dots[hf] >> (7-xi) & 1) ? bgcolor : color;
else
pen = (dots[hf] >> (7-xi) & 1) ? color : bgcolor;
- bitmap.pix32(y, x*8+xi) = palette[pen];
+ bitmap.pix(y, x*8+xi) = palette[pen];
// when the mc6845 device gains full interlace&video support, replace the line above with the line below
- // bitmap.pix32(y*(interlace+1)+hf, x*8+xi) = palette[pen];
+ // bitmap.pix(y*(interlace+1)+hf, x*8+xi) = palette[pen];
}
}
}