dosemu-1.1.3 and Cyrillic_er

Hello.

But in fact this means that the problem is still there.
The problem is that normally altgr map is similar to the alt map, so the special keycodes in it are mapped as for the alt map.
But you are reserving altgr map for Cyrillic, so it must be treated as a plain map.
And for the plain map, the BackSpace keycode gets altered back to 8, see init_misc_plain_map() and init_misc_shifted_map().
So I think that the real fix would be something like the attached patch.

Actually I think it is a bios keycodes, so it must be 8. Which is done with the attached patch and no need to modify the keymaps at all. This patch also fixes some other small problems with ctrl and alt modifiers in cyrillic mode.
Does this look like a correct fix to you? And of course the root of the problem seems to be that dosemu currently doesn't natively support the layout switching.

@@ -361,11 +361,11 @@
 }
 static void init_misc_altgr_map(t_keysym *rule)
 {
-	rule[NUM_SPACE] = KEY_SPACE;
+	init_misc_plain_map(rule);
 }
 static void init_misc_shift_altgr_map(t_keysym *rule)
 {
-	rule[NUM_SPACE] = KEY_SPACE;
+	init_misc_shifted_map(rule);
 }
 static void init_misc_ctrl_alt_map(t_keysym *rule)
 {

@@ -1134,10 +1134,11 @@
 	if ((shiftstate & ANY_ALT) && (shiftstate & ANY_CTRL)) {
 		ch = state->rules->map.ctrl_alt[key];
 	}
-  else if ((shiftstate & (R_ALT|ALTGR_LOCK)) && (shiftstate & ANY_SHIFT)) {
+	else if ((shiftstate & ALTGR_LOCK) && (shiftstate & ANY_SHIFT) &&
+	    !(shiftstate & (ANY_CTRL | ANY_ALT))) {
 		ch = state->rules->map.shift_altgr[key];
 	}
-  else if (shiftstate & (R_ALT|ALTGR_LOCK)) {
+	else if ((shiftstate & ALTGR_LOCK) && !(shiftstate & (ANY_CTRL | ANY_ALT))) {
 		ch = state->rules->map.altgr[key];
 	}
 	else if (shiftstate & ANY_ALT) {

Stas> But in fact this means that the problem is still there. The Stas> problem is that normally altgr map is similar to the alt map, Stas> so the special keycodes in it are mapped as for the alt map. Stas> But you are reserving altgr map for Cyrillic, so it must be Stas> treated as a plain map.

Maybe having separate keymaps would be more correctly. As for non-unicode keymaps.

Stas> This patch also fixes some other small problems with ctrl and Stas> alt modifiers in cyrillic mode.

I think this is needed too.

@@ -705,8 +705,8 @@
        init_charset_keymap(charset, map->shift, MODIFIER_SHIFT); 
        init_charset_keymap(charset, map->ctrl, MODIFIER_CTRL);
        init_charset_keymap(charset, map->alt, MODIFIER_ALT);
-       init_charset_keymap(charset, map->altgr, MODIFIER_ALTGR);
-       init_charset_keymap(charset, map->shift_altgr, MODIFIER_SHIFT | MODIFIER_ALTGR);
+       init_charset_keymap(charset, map->altgr, 0);
+       init_charset_keymap(charset, map->shift_altgr, MODIFIER_SHIFT);
        init_charset_keymap(charset, map->ctrl_alt, MODIFIER_CTRL | MODIFIER_ALT);
 
        or better this

@@ -1707,7 +1709,7 @@
        struct key_pressed_state *keys = &state->keys_pressed;
 
        /* altgr implies alt */
-       if (desired & MODIFIER_ALTGR)   desired |= MODIFIER_ALT;
+//     if (desired & MODIFIER_ALTGR)   desired |= MODIFIER_ALT;
 
        /* To keep some bits constant copy them from state->shiftstate into 
         * desired.

Stas> Does this look like a correct fix to you?

Quite correct I think.

Stas> And of course the root of the problem seems to be that dosemu Stas> currently doesn't natively support the layout switching.

  Sergey Suleymanov