diff --git a/src/include/86box/network.h b/src/include/86box/network.h
index 85b2d8276..f4e653a33 100644
--- a/src/include/86box/network.h
+++ b/src/include/86box/network.h
@@ -71,7 +71,7 @@ typedef int (*NETSETLINKSTATE)(void *);
 
 typedef struct netpkt {
     void		*priv;
-    uint8_t		*data;
+    uint8_t		data[65536];	/* Maximum length + 1 to round up to the nearest power of 2. */
     int			len;
 
     struct netpkt	*prev, *next;
diff --git a/src/mem.c b/src/mem.c
index 4ab0abd8a..0e93e0fb1 100644
--- a/src/mem.c
+++ b/src/mem.c
@@ -691,7 +691,7 @@ writemembl(uint32_t addr, uint8_t val)
     mem_mapping_t *map;
     mem_logical_addr = addr;
 
-    if (page_lookup[addr>>12]) {
+    if (page_lookup[addr>>12] && page_lookup[addr>>12]->write_b) {
 	page_lookup[addr>>12]->write_b(addr, val, page_lookup[addr>>12]);
 	return;
     }
@@ -799,7 +799,7 @@ writememwl(uint32_t addr, uint16_t val)
 	}
     }
 
-    if (page_lookup[addr>>12]) {
+    if (page_lookup[addr>>12] && page_lookup[addr>>12]->write_w) {
 	page_lookup[addr>>12]->write_w(addr, val, page_lookup[addr>>12]);
 	return;
     }
@@ -918,7 +918,7 @@ writememll(uint32_t addr, uint32_t val)
 		return;
 	}
     }
-    if (page_lookup[addr>>12]) {
+    if (page_lookup[addr>>12] && page_lookup[addr>>12]->write_l) {
 	page_lookup[addr>>12]->write_l(addr, val, page_lookup[addr>>12]);
 	return;
     }
@@ -1033,7 +1033,7 @@ writememql(uint32_t addr, uint64_t val)
 		return;
 	}
     }
-    if (page_lookup[addr>>12]) {
+    if (page_lookup[addr>>12] && page_lookup[addr>>12]->write_l) {
 	page_lookup[addr>>12]->write_l(addr, val, page_lookup[addr>>12]);
 	page_lookup[addr>>12]->write_l(addr + 4, val >> 32, page_lookup[addr>>12]);
 	return;
@@ -1190,7 +1190,7 @@ writememwl(uint32_t seg, uint32_t addr, uint16_t val)
 	}
     }
 
-    if (page_lookup[addr2>>12]) {
+    if (page_lookup[addr2>>12] && page_lookup[addr2>>12]->write_w) {
 	page_lookup[addr2>>12]->write_w(addr2, val, page_lookup[addr2>>12]);
 	return;
     }
@@ -1312,7 +1312,7 @@ writememll(uint32_t seg, uint32_t addr, uint32_t val)
 	}
     }
 
-    if (page_lookup[addr2>>12]) {
+    if (page_lookup[addr2>>12] && page_lookup[addr2>>12]->write_l) {
 	page_lookup[addr2>>12]->write_l(addr2, val, page_lookup[addr2>>12]);
 	return;
     }
@@ -1429,7 +1429,7 @@ writememql(uint32_t seg, uint32_t addr, uint64_t val)
 	}
     }
 
-    if (page_lookup[addr2>>12]) {
+    if (page_lookup[addr2>>12] && page_lookup[addr2>>12]->write_l) {
 	page_lookup[addr2>>12]->write_l(addr2, val, page_lookup[addr2>>12]);
 	page_lookup[addr2>>12]->write_l(addr2 + 4, val >> 32, page_lookup[addr2>>12]);
 	return;
@@ -2439,7 +2439,7 @@ mem_a20_init(void)
 void
 mem_reset(void)
 {
-    uint32_t c, m;
+    uint32_t c, m, m2;
 
     m = 1024UL * mem_size;
     if (ram != NULL) {
@@ -2460,23 +2460,21 @@ mem_reset(void)
 		m = 4096;
 	} else {
 		/* 80386+; maximum address space is 4GB. */
-		if (is486) {
-			/* We need this since there might be BIOS execution at the end of RAM,
-			   which could break the recompiler if there's not enough page elements. */
-			m = 1048576;
-		} else {
-			m = (mem_size + 384) >> 2;
-			if ((m << 2) < (mem_size + 384))
-				m++;
-			if (m < 4096)
-				m = 4096;
-		}
+		m = 1048576;
 	}
     } else {
 	/* 8088/86; maximum address space is 1MB. */
 	m = 256;
     }
 
+    /* Calculate the amount of pages used by RAM, so that we can
+       give all the pages above this amount NULL write handlers. */
+    m2 = (mem_size + 384) >> 2;
+    if ((m2 << 2) < (mem_size + 384))
+	m2++;
+    if (m2 < 4096)
+	m2 = 4096;
+
     /*
      * Allocate and initialize the (new) page table.
      * We only do this if the size of the page table has changed.
@@ -2552,9 +2550,17 @@ mem_log("MEM: reset: new pages=%08lx, pages_sz=%i\n", pages, pages_sz);
 
     for (c = 0; c < pages_sz; c++) {
 	pages[c].mem = &ram[c << 12];
-	pages[c].write_b = mem_write_ramb_page;
-	pages[c].write_w = mem_write_ramw_page;
-	pages[c].write_l = mem_write_raml_page;
+	if (c < m) {
+		pages[c].write_b = mem_write_ramb_page;
+		pages[c].write_w = mem_write_ramw_page;
+		pages[c].write_l = mem_write_raml_page;
+	} else {
+		/* Make absolute sure non-RAM pages have NULL handlers so the
+		   memory read/write handlers know to ignore them. */
+		pages[c].write_b = NULL;
+		pages[c].write_w = NULL;
+		pages[c].write_l = NULL;
+	}
 #ifdef USE_NEW_DYNAREC
 	pages[c].evict_prev = EVICT_NOT_IN_LIST;
 	pages[c].byte_dirty_mask = &byte_dirty_mask[c * 64];
diff --git a/src/network/network.c b/src/network/network.c
index de9c2ed1c..5f4c6dbaf 100644
--- a/src/network/network.c
+++ b/src/network/network.c
@@ -230,7 +230,6 @@ network_queue_put(int tx, void *priv, uint8_t *data, int len)
     temp = (netpkt_t *) malloc(sizeof(netpkt_t));
     memset(temp, 0, sizeof(netpkt_t));
     temp->priv = priv;
-    temp->data = (uint8_t *) malloc(len);
     memcpy(temp->data, data, len);
     temp->len = len;
     temp->prev = last_pkt[tx];
@@ -266,8 +265,6 @@ network_queue_advance(int tx)
 	return;
 
     first_pkt[tx] = temp->next;
-    if (temp->data != NULL)
-	free(temp->data);
     free(temp);
 
     if (first_pkt[tx] == NULL)
@@ -284,8 +281,6 @@ network_queue_clear(int tx)
 	return;
 
     do {
-	if (temp->data != NULL)
-		free(temp->data);
 	free(temp);
 	temp = temp->next;
     } while (temp != NULL);
diff --git a/src/win/win_mouse.c b/src/win/win_mouse.c
index 09a27f052..2e91085ec 100644
--- a/src/win/win_mouse.c
+++ b/src/win/win_mouse.c
@@ -89,8 +89,8 @@ win_mouse_handle(PRAWINPUT raw)
 		 * seems to work fine for RDP on Windows 10
 		 * Not sure about other environments.
 		 */
-		mousestate.dx += (state.lLastX - x)/100;
-		mousestate.dy += (state.lLastY - y)/100;
+		mousestate.dx += (state.lLastX - x)/25;
+		mousestate.dy += (state.lLastY - y)/25;
 		x=state.lLastX; 
 		y=state.lLastY;
 	} else {