diff --git a/src/video/vid_ati_mach64.c b/src/video/vid_ati_mach64.c
index 8403e718d..04d497f28 100644
--- a/src/video/vid_ati_mach64.c
+++ b/src/video/vid_ati_mach64.c
@@ -4253,13 +4253,6 @@ mach64_read_linear(uint32_t addr, void *priv)
 
     cycles -= svga->monitor->mon_video_timing_read_b;
 
-    if (!svga->fast) {
-        if (svga->chain2_read) {
-            addr &= ~1;
-            addr <<= 2;
-        }
-    }
-
     addr &= svga->decode_mask;
     if (addr >= svga->vram_max)
         return 0xff;
@@ -4302,13 +4295,6 @@ mach64_write_linear(uint32_t addr, uint8_t val, void *priv)
 
     cycles -= svga->monitor->mon_video_timing_write_b;
 
-    if (!svga->fast) {
-        if (svga->chain2_write) {
-            addr &= ~1;
-            addr <<= 2;
-        }
-    }
-
     addr &= svga->decode_mask;
     if (addr >= svga->vram_max)
         return;