Exit SVGA emulation loop immediately if board interrupt was activated.

diff --git a/gfxboard.cpp b/gfxboard.cpp
index 9bced2a2c45b2c6ee51e5bf209bab6f1039dc98d..71da64b5a5358940baa2899c8c4bbb428354042e 100644 (file)
--- a/gfxboard.cpp
+++ b/gfxboard.cpp
@@ -487,6 +487,7 @@ struct rtggfxboard
        int resolutionchange;
        uae_u8 *gfxboard_surface, *fakesurface_surface;
        bool gfxboard_intreq;
+       bool gfxboard_intreq_status;
        bool gfxboard_intreq_marked;
        bool gfxboard_external_interrupt;
        int gfxboard_intena;
@@ -969,6 +970,7 @@ static void gfxboard_hsync_handler(void)
                }
                if (gb->pcemdev && gb->pcemobject2 && !gb->pcem_vblank) {
                        static int pollcnt;
+                       bool pirq = gb->gfxboard_intreq_status;
                        int total = svga_get_vtotal(gb->pcemobject2);
                        if (total <= 0)
                                total = p96syncrate;
@@ -980,6 +982,12 @@ static void gfxboard_hsync_handler(void)
                                        pollcnt &= 0xff;
                                        break;
                                }
+                               bool nirq = gb->gfxboard_intreq_status;
+                               // exit immediately if new interrupt was generated. It might be used for screen split.
+                               if (!pirq && nirq) {
+                                       pollcnt &= 0xff;
+                                       break;
+                               }
                                pollcnt -= 256;
                        }
                }
@@ -1661,6 +1669,7 @@ void gfxboard_intreq(void *p, int act, bool safe)
        struct rtggfxboard *gb = (struct rtggfxboard*)p;
        if (act) {
                if (gb->board->irq && gb->gfxboard_intena) {
+                       gb->gfxboard_intreq_status = true;
                        if (gb->board->irq > 0) {
                                gb->gfxboard_intreq = 1;
                                gb->gfxboard_intreq_marked = 1;
@@ -1670,6 +1679,7 @@ void gfxboard_intreq(void *p, int act, bool safe)
                }
        } else {
                gb->gfxboard_intreq = 0;
+               gb->gfxboard_intreq_status = false;
                if (gb->board->irq < 0) {
                        gb->pcibs->irq_callback(gb->pcibs, false);
                }