Add 10ms interval option (not exposed yet to UI)

Fix percentage counter

src/86box.c

@@ -217,6 +217,7 @@ int      test_mode                              = 0;              /* (C) Test mo
 char     uuid[MAX_UUID_LEN]                     = { '\0' };       /* (C) UUID or machine identifier */
 int      sound_muted                            = 0;              /* (C) Is sound muted? */
 int      inhibit_multimedia_keys;                                 /* (C) Inhibit multimedia keys on Windows. */
+int      force_10ms;                                              /* (C) Force 10ms CPU frame intervals. */
 
 int      other_ide_present = 0;                                   /* IDE controllers from non-IDE cards are
                                                                      present */
@@ -1592,19 +1593,19 @@ update_mouse_msg(void)
         *(wcp - 1) = L'\0';
     mbstowcs(wcpu, cpu_s->name, strlen(cpu_s->name) + 1);
 #ifdef _WIN32
-    swprintf(mouse_msg[0], sizeof_w(mouse_msg[0]), L"%%i%%%% - %ls",
+    swprintf(mouse_msg[0], sizeof_w(mouse_msg[0]), L"%%.1lf%%%% - %ls",
              plat_get_string(STRING_MOUSE_CAPTURE));
-    swprintf(mouse_msg[1], sizeof_w(mouse_msg[1]), L"%%i%%%% - %ls",
+    swprintf(mouse_msg[1], sizeof_w(mouse_msg[1]), L"%%.1lf%%%% - %ls",
              (mouse_get_buttons() > 2) ? plat_get_string(STRING_MOUSE_RELEASE) : plat_get_string(STRING_MOUSE_RELEASE_MMB));
     wcsncpy(mouse_msg[2], L"%i%%", sizeof_w(mouse_msg[2]));
 #else
-    swprintf(mouse_msg[0], sizeof_w(mouse_msg[0]), L"%ls v%ls - %%i%%%% - %ls - %ls/%ls - %ls",
+    swprintf(mouse_msg[0], sizeof_w(mouse_msg[0]), L"%ls v%ls - %%.1lf%%%% - %ls - %ls/%ls - %ls",
              EMU_NAME_W, EMU_VERSION_FULL_W, wmachine, wcpufamily, wcpu,
              plat_get_string(STRING_MOUSE_CAPTURE));
-    swprintf(mouse_msg[1], sizeof_w(mouse_msg[1]), L"%ls v%ls - %%i%%%% - %ls - %ls/%ls - %ls",
+    swprintf(mouse_msg[1], sizeof_w(mouse_msg[1]), L"%ls v%ls - %%.1lf%%%% - %ls - %ls/%ls - %ls",
              EMU_NAME_W, EMU_VERSION_FULL_W, wmachine, wcpufamily, wcpu,
              (mouse_get_buttons() > 2) ? plat_get_string(STRING_MOUSE_RELEASE) : plat_get_string(STRING_MOUSE_RELEASE_MMB));
-    swprintf(mouse_msg[2], sizeof_w(mouse_msg[2]), L"%ls v%ls - %%i%%%% - %ls - %ls/%ls",
+    swprintf(mouse_msg[2], sizeof_w(mouse_msg[2]), L"%ls v%ls - %%.1lf%%%% - %ls - %ls/%ls",
              EMU_NAME_W, EMU_VERSION_FULL_W, wmachine, wcpufamily, wcpu);
 #endif
 }
@@ -1714,7 +1715,7 @@ pc_run(void)
 
     /* Run a block of code. */
     startblit();
-    cpu_exec((int32_t) cpu_s->rspeed / 1000);
+    cpu_exec((int32_t) cpu_s->rspeed / (force_10ms ? 100 : 1000));
     ack_pause();
 #ifdef USE_GDBSTUB /* avoid a KBC FIFO overflow when CPU emulation is stalled */
     if (gdbstub_step == GDBSTUB_EXEC) {
@@ -1729,14 +1730,14 @@ pc_run(void)
 
     /* Done with this frame, update statistics. */
     framecount++;
-    if (++framecountx >= 1000) {
+    if (++framecountx >= (force_10ms ? 100 : 1000)) {
         framecountx = 0;
         frames      = 0;
     }
 
     if (title_update) {
         mouse_msg_idx = ((mouse_type == MOUSE_TYPE_NONE) || (mouse_input_mode >= 1)) ? 2 : !!mouse_capture;
-        swprintf(temp, sizeof_w(temp), mouse_msg[mouse_msg_idx], fps);
+        swprintf(temp, sizeof_w(temp), mouse_msg[mouse_msg_idx], (double)fps / (force_10ms ? 1. : 10.));
 #ifdef __APPLE__
         /* Needed due to modifying the UI on the non-main thread is a big no-no. */
         dispatch_async_f(dispatch_get_main_queue(), wcsdup((const wchar_t *) temp), _ui_window_title);

src/config.c

@@ -144,6 +144,8 @@ load_general(void)
     video_grayscale  = ini_section_get_int(cat, "video_grayscale", 0);
     video_graytype   = ini_section_get_int(cat, "video_graytype", 0);
 
+    force_10ms = !!ini_section_get_int(cat, "force_10ms", 0);
+
     rctrl_is_lalt = ini_section_get_int(cat, "rctrl_is_lalt", 0);
     update_icons  = ini_section_get_int(cat, "update_icons", 1);
 
@@ -1947,6 +1949,10 @@ save_general(void)
 
     const char *va_name;
 
+    ini_section_set_int(cat, "force_10ms", force_10ms);
+    if (force_10ms == 0)
+        ini_section_delete_var(cat, "force_10ms");
+
     ini_section_set_int(cat, "inhibit_multimedia_keys", inhibit_multimedia_keys);
     if (inhibit_multimedia_keys == 0)
         ini_section_delete_var(cat, "inhibit_multimedia_keys");

src/cpu/386_dynarec.c

@@ -739,7 +739,7 @@ exec386_dynarec(int32_t cycs)
     uint64_t oldtsc;
     uint64_t delta;
 
-    int32_t cyc_period = cycs / 200; /*5us*/
+    int32_t cyc_period = cycs / (force_10ms ? 2000 : 200); /*5us*/
 
 #    ifdef USE_ACYCS
     acycs = 0;

src/include/86box/86box.h

@@ -154,6 +154,7 @@ extern int      confirm_reset;              /* (C) enable reset confirmation */
 extern int      confirm_exit;               /* (C) enable exit confirmation */
 extern int      confirm_save;               /* (C) enable save confirmation */
 extern int      enable_discord;             /* (C) enable Discord integration */
+extern int      force_10ms;					/* (C) force 10ms CPU frame interval */
 extern int      other_ide_present;          /* IDE controllers from non-IDE cards are present */
 extern int      other_scsi_present;         /* SCSI controllers from non-SCSI cards are present */
 

src/qt/qt_main.cpp

@@ -448,14 +448,14 @@ main_thread_fn()
         const uint64_t new_time = elapsed_timer.elapsed();
 #ifdef USE_GDBSTUB
         if (gdbstub_next_asap && (drawits <= 0))
-            drawits = 1;
+            drawits = force_10ms ? 10 : 1;
         else
 #endif
             drawits += static_cast<int>(new_time - old_time);
         old_time = new_time;
         if (drawits > 0 && !dopause) {
             /* Yes, so do one frame now. */
-            drawits -= 1;
+            drawits -= force_10ms ? 10 : 1;
             if (drawits > 50)
                 drawits = 0;
 
@@ -474,8 +474,8 @@ main_thread_fn()
                     break;
             }
 #endif
-            /* Every 200 frames we save the machine status. */
+            /* Every 2 emulated seconds we save the machine status. */
-            if (++frames >= 2000 && nvr_dosave) {
+            if (++frames >= (force_10ms ? 200 : 2000) && nvr_dosave) {
                 qt_nvr_save();
                 nvr_dosave = 0;
                 frames     = 0;