diff options
author | Frank Palazzolo <frank@avoidspikes.com> | 2017-06-06 00:38:10 -0400 |
---|---|---|
committer | Vas Crabb <cuavas@users.noreply.github.com> | 2017-06-06 14:38:10 +1000 |
commit | 101cc6720263a729a28bf4131b941d182de91422 (patch) | |
tree | 64845d2dc561b206b972409f1260fcad3e007cc9 /src/mame/includes/starshp1.h | |
parent | a29e43a74cecc09815aa1b21e99d4f64968f7fc5 (diff) |
Fix mametesters bug #3041 (#2359)
* starshp1: Fast/Slow control from toggled to momentary, as in real game
* Update clocks per latest information
* Add note about Throttle Level behaviour
* Change format of comments
Diffstat (limited to 'src/mame/includes/starshp1.h')
-rw-r--r-- | src/mame/includes/starshp1.h | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/src/mame/includes/starshp1.h b/src/mame/includes/starshp1.h index fc4e239271d..a376c2ab8ec 100644 --- a/src/mame/includes/starshp1.h +++ b/src/mame/includes/starshp1.h @@ -14,8 +14,16 @@ * probably too low. I suspect that screen is not really * 512 pixels wide -- most likely 384, which would give 60Hz * - * Some of the graphics, like the starfield, is clocked with the - * 12MHz signal, effectively doubling the horizontal resolution + * Based on photographs of the PCB, and analysis of videos of + * actual gameplay, the horizontal screen really is 384 clocks. + * + * However, some of the graphics, like the starfield, are + * clocked with the 12MHz signal. This effectively doubles + * the horizontal resolution: + * + * 6.048Mhz clocks 12.096Mhz clocks + * Horizontal Visible Area 384 (0x180) 768 (0x300) + * Horizontal Blanking Time 128 (0x080) 256 (0x100) */ #include "sound/discrete.h" @@ -24,8 +32,8 @@ #define STARSHP1_MASTER_CLOCK (12096000) #define STARSHP1_CPU_CLOCK (STARSHP1_MASTER_CLOCK / 16) -#define STARSHP1_PIXEL_CLOCK (STARSHP1_MASTER_CLOCK / 2) -#define STARSHP1_HTOTAL (0x200) +#define STARSHP1_PIXEL_CLOCK (STARSHP1_MASTER_CLOCK) +#define STARSHP1_HTOTAL (0x300) #define STARSHP1_HBEND (0x000) #define STARSHP1_HBSTART (0x200) #define STARSHP1_VTOTAL (0x106) |