diff options
Diffstat (limited to 'src/emu/cpu/alto2/a2disp.h')
-rw-r--r-- | src/emu/cpu/alto2/a2disp.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/emu/cpu/alto2/a2disp.h b/src/emu/cpu/alto2/a2disp.h index 95da3343d5c..3eb27227bee 100644 --- a/src/emu/cpu/alto2/a2disp.h +++ b/src/emu/cpu/alto2/a2disp.h @@ -76,8 +76,8 @@ #define ALTO2_DISPLAY_HEIGHT 808 //!< number of visible scanlines per frame; 808 really, but there are some empty lines? #define ALTO2_DISPLAY_WIDTH 606 //!< visible width of the display; 38 x 16 bit words - 2 pixels #define ALTO2_DISPLAY_VISIBLE_WORDS ((ALTO2_DISPLAY_WIDTH+15)/16) //!< visible words per scanline -#define ALTO2_DISPLAY_BITCLOCK 20160000ll //!< display bit clock in in Hertz (20.16MHz) -#define ALTO2_DISPLAY_BITTIME(n) (U64(1000000000000)*(n)/ALTO2_DISPLAY_BITCLOCK) //!< display bit time in in pico seconds (~= 49.6031ns) +#define ALTO2_DISPLAY_BITCLOCK 20160000ll //!< display bit clock in Hertz (20.16MHz) +#define ALTO2_DISPLAY_BITTIME(n) (U64(1000000000000)*(n)/ALTO2_DISPLAY_BITCLOCK) //!< display bit time in pico seconds (~= 49.6031ns) #define ALTO2_DISPLAY_SCANLINE_TIME ALTO2_DISPLAY_BITTIME(ALTO2_DISPLAY_TOTAL_WIDTH)//!< time for a scanline in pico seconds (768 * 49.6031ns ~= 38095.1808ns) #define ALTO2_DISPLAY_VISIBLE_TIME ALTO2_DISPLAY_BITTIME(ALTO2_DISPLAY_WIDTH) //!< time of the visible part of a scanline in pico seconds (606 * 49.6031ns ~= 30059.4786ns) #define ALTO2_DISPLAY_WORD_TIME ALTO2_DISPLAY_BITTIME(16) //!< time for a word in pico seconds (16 pixels * 49.6031ns ~= 793.6496ns) |