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Diffstat (limited to 'src/mame/drivers/ibm6580.cpp')
-rw-r--r--src/mame/drivers/ibm6580.cpp38
1 files changed, 21 insertions, 17 deletions
diff --git a/src/mame/drivers/ibm6580.cpp b/src/mame/drivers/ibm6580.cpp
index 0f2ec3a18d1..26ae14be877 100644
--- a/src/mame/drivers/ibm6580.cpp
+++ b/src/mame/drivers/ibm6580.cpp
@@ -717,23 +717,24 @@ INPUT_PORTS_END
uint32_t ibm6580_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
- uint8_t y,ra,gfx,fg,bg,chr,attr;
- uint16_t sy=0,ma=25,x,ca;
+ uint16_t sy=0,ma=25;
- fg = 1; bg = 0;
+ uint8_t fg = 1, bg = 0;
- for (y = 0; y < 25; y++)
+ for (uint8_t y = 0; y < 25; y++)
{
- for (ra = 0; ra < 16; ra++)
+ for (uint8_t ra = 0; ra < 16; ra++)
{
- uint16_t *p = &bitmap.pix16(sy++);
+ uint16_t *p = &bitmap.pix(sy++);
- // graphics mode
- if (m_p_videoram[ma] & 0x100) {
- for (x = ma; x < ma + 80; x++)
+ if (m_p_videoram[ma] & 0x100)
+ {
+ // graphics mode
+ for (uint16_t x = ma; x < ma + 80; x++)
{
- chr = m_p_videoram[x];
- attr = m_p_videoram[x] >> 8;
+ uint8_t const chr = m_p_videoram[x];
+ uint8_t const attr = m_p_videoram[x] >> 8;
+ uint8_t gfx;
switch (ra >> 1)
{
@@ -764,13 +765,16 @@ uint32_t ibm6580_state::screen_update(screen_device &screen, bitmap_ind16 &bitma
*p++ = BIT(gfx, i) ? fg : bg;
}
}
- } else {
- // text mode
- for (x = ma; x < ma + 80; x++)
+ }
+ else
+ {
+ // text mode
+ for (uint16_t x = ma; x < ma + 80; x++)
{
- chr = m_p_videoram[x];
- attr = m_p_videoram[x] >> 8;
- ca = (chr<<4);
+ uint8_t const chr = m_p_videoram[x];
+ uint8_t const attr = m_p_videoram[x] >> 8;
+ uint16_t ca = (chr<<4);
+ uint8_t gfx;
// font 2
if (attr & 0x02)