diff -ur grub-1.91-riscos.old/memory/arm/RISC_OS/asm.S grub-1.91-riscos/memory/arm/RISC_OS/asm.S
--- grub-1.91-riscos.old/memory/arm/RISC_OS/asm.S	2007-04-13 11:13:40.000000000 +0100
+++ grub-1.91-riscos/memory/arm/RISC_OS/asm.S	2007-04-13 11:14:11.000000000 +0100
@@ -44,6 +44,7 @@
 	str	r1, [a4] @ Store table size
 	str	r2, [ip] @ Store page size
 	mov	a1, r1
+	add	a1, a1, #131072 @ workaround RISC OS 4 problems
 	bl	grub_malloc
 	movs	r1, a1
 	ldreq	pc, [sp], #4
diff -ur grub-1.91-riscos.old/memory/arm/RISC_OS/misc.c grub-1.91-riscos/memory/arm/RISC_OS/misc.c
--- grub-1.91-riscos.old/memory/arm/RISC_OS/misc.c	2007-04-13 11:13:30.000000000 +0100
+++ grub-1.91-riscos/memory/arm/RISC_OS/misc.c	2007-04-11 23:02:41.000000000 +0100
@@ -131,7 +131,7 @@
   last = &space.map;
   grub_uint8_t last_type = table[0] & 7;
   grub_addr_t last_index = 0;
-  for (grub_addr_t i = 0; i != table_size; ++i)
+  for (grub_addr_t i = 0; i <= table_size; ++i)
     {
       grub_uint8_t new_type, val = table[i];