Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-05-22 13:48:55 +03:00
Code Issues Actions 6 Packages Projects Releases Wiki Activity

ssv: fixed "disable background" register; fixed x tilemap's offset

Browse Source
This commit is contained in:
Roberto Zandona 2010-09-14 20:19:04 +00:00
parent e22fd1b2c7
commit 99c5d52312
1 changed files with 18 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
src/mame/video/ssv.c
View File

@ -650,34 +650,34 @@ static void draw_row(running_machine *machine, bitmap_t *bitmap, const rectangle
if (clip.max_y > cliprect->max_y) clip.max_y = cliprect->max_y;
/* Get the scroll data */
x = ssv_scroll[ scroll * 4 + 0 ]; // x scroll
y = ssv_scroll[ scroll * 4 + 1 ]; // y scroll
// ssv_scroll[ scroll * 4 + 2 ]; // ???
mode = ssv_scroll[ scroll * 4 + 3 ]; // layer disabled, shadow, depth etc.
/* Background layer disabled */
if ((mode & 0xf000) == 0)
if ((mode & 0xe000) == 0)
return;
shadow = (mode & 0x0800);
/* Decide the actual size of the tilemap. $200 and $400 pixels
are the only values actually used AFAIK */
/* Decide the actual size of the tilemap */
size = 1 << (8 + ((mode & 0xe000) >> 13));
page = (x & 0x7fff) / size;
/* Given a fixed scroll value, the portion of tilemap displayed changes
with the sprite position */
/* Given a fixed scroll value, the portion of tilemap displayed changes with the sprite position */
x += sx;
y += sy;
/* Tweak the scroll values (game specific) */
/* Tweak the scroll values */
// x += 0;
y += ((ssv_scroll[0x70/2] & 0x1ff) - (ssv_scroll[0x70/2] & 0x200) + ssv_scroll[0x6a/2] + 2);
/* Draw the rows */
// Kludge for eaglshot
if ((ssv_scroll[ scroll * 4 + 2 ] & 0x05ff) == 0x0440) x += -0x10;
if ((ssv_scroll[ scroll * 4 + 2 ] & 0x05ff) == 0x0401) x += -0x20;
/* Draw the rows */
x1 = x;
y1 = y;
sx1 = sx - (x & 0xf);