Report virtual x offset and screen with in svga mode properly. Fixes bootchess

2015-04-17 22:49:49 +02:00 · 2015-04-17 22:49:49 +02:00 · 7c398aa666
parent 689529fbcc
commit 7c398aa666
1 changed files with 4 additions and 1 deletions
--- a/src/vga.js
+++ b/src/vga.js
@ -1138,7 +1138,10 @@ VGAScreen.prototype.svga_register_read = function(n)
            return this.svga_bank_offset >>> 16;
        case 6:
            // virtual width
-            return this.svga_width;
+            return this.screen_width;
+        case 8:
+            // x offset
+            return 0;
        case 0x0A:
            // memory size in 64 kilobyte banks
            return this.vga_memory_size / VGA_BANK_SIZE | 0;