Fix CGA scrolling.

b9c322d5 · Silas Boyd-Wickizer · 21a46387 · b9c322d5 · b9c322d5
--- a/TODO
+++ b/TODO
-* fix cga console (it doesn't scroll correctly)
 * get gcc asm labels working for cpu, proc, kmem
  - (I couldn't stop gcc from generating RIP-relative movs)
 * get something like asm labels working in clang

--- a/cga.c
+++ b/cga.c
@@ -27,9 +27,9 @@ cgaputc(int c)
    crt[pos++] = (c&0xff) | color;
  
  if((pos/80) >= 24){  // Scroll up.
-    memmove((void*)crt, (void*)crt+80, sizeof(crt[0])*23*80);
+    memmove((void *)crt, (void*)(crt+80), sizeof(crt[0])*23*80);
    pos -= 80;
-    memset((void*)crt+pos, 0, sizeof(crt[0])*(24*80 - pos));
+    memset((void *)(crt+pos), 0, sizeof(crt[0])*(24*80 - pos));
  }
  
  outb(CRTPORT, 14);