Index: peripherals/ide/divide.c
===================================================================
--- peripherals/ide/divide.c	(revision 4683)
+++ peripherals/ide/divide.c	(working copy)
@@ -484,6 +484,8 @@
     libspectrum_byte *memory =
       memory_pool_allocate_persistent( DIVIDE_PAGES * DIVIDE_PAGE_LENGTH, 1 );
 
+    memset( memory, 0, DIVIDE_PAGES * DIVIDE_PAGE_LENGTH );
+
     for( i = 0; i < DIVIDE_PAGES; i++ ) {
       divide_ram[i] = memory + i * DIVIDE_PAGE_LENGTH;
       for( j = 0; j < MEMORY_PAGES_IN_8K; j++ ) {