Revert "Merge branch 'bugfixes' into master"

This reverts commit 8250b57325, reversing
changes made to 6c643d05b8.

src/video/vid_ps55da2.c

@@ -356,6 +356,7 @@ typedef struct da2_t {
     uint64_t   da2const;
 
     int dispon;
+    int hdisp_on;
 
     uint32_t memaddr, memaddr_backup, cursoraddr;
     int      vc;
@@ -3019,6 +3020,7 @@ da2_poll(void *priv)
         da2->linepos = 1;
 
         if (da2->dispon) {
+            da2->hdisp_on = 1;
 
             da2->memaddr &= da2->vram_display_mask;
             if (da2->firstline == 2000) {
@@ -3050,6 +3052,7 @@ da2_poll(void *priv)
 
         if (da2->dispon)
             da2->cgastat &= ~1;
+        da2->hdisp_on = 0;
 
         da2->linepos = 0;
         if (da2->scanline == (da2->crtc[LC_CURSOR_ROW_END] & 31))