diff --git a/kernel/init-mod.h b/kernel/init-mod.h
index 94ade1a..cb6924d 100644
--- a/kernel/init-mod.h
+++ b/kernel/init-mod.h
@@ -275,6 +275,12 @@ extern struct {
 
 extern UWORD DOSFAR LBA_WRITE_VERIFY;
 
+/* original interrupt vectors, at 70:xxxx */
+extern struct lowvec {
+  unsigned char intno;
+  intvec isv;
+} DOSTEXTFAR ASM intvec_table[5];
+
 /* floppy parameter table, at 70:xxxx */
 extern unsigned char DOSTEXTFAR ASM int1e_table[0xe];
 
diff --git a/kernel/irqstack.asm b/kernel/irqstack.asm
index 63dc3c7..cc49bd5 100644
--- a/kernel/irqstack.asm
+++ b/kernel/irqstack.asm
@@ -32,7 +32,7 @@
 
 %include "segs.inc"
 
-segment	_LOWTEXT
+segment	_IRQTEXT
 
 old_vectors     times 16 dd 0
 stack_size      dw      0
@@ -155,6 +155,10 @@ dont_switch:    pushf
                 iret
 
 
+                ; align to 100h to align _LOWTEXT for interrupt vectors
+                ; in kernel.asm
+                times (100h - ($ - old_vectors)) db 0
+
 segment	INIT_TEXT
 
 global  _init_stacks
diff --git a/kernel/kernel.asm b/kernel/kernel.asm
index db8257c..f07496f 100644
--- a/kernel/kernel.asm
+++ b/kernel/kernel.asm
@@ -233,6 +233,21 @@ no_nul_read:
                 retf
 
 segment _LOWTEXT
+
+                ; low interrupt vectors 10h,13h,15h,19h,1Bh
+                ; these need to be at 0070:0100 (see RBIL memory.lst)
+                global _intvec_table
+_intvec_table:  db 10h
+                dd 0
+                db 13h
+                dd 0
+                db 15h
+                dd 0
+                db 19h
+                dd 0
+                db 1Bh
+                dd 0
+
                 ; floppy parameter table
                 global _int1e_table
 _int1e_table:   times 0eh db 0
diff --git a/kernel/main.c b/kernel/main.c
index bb669b9..82a4b46 100644
--- a/kernel/main.c
+++ b/kernel/main.c
@@ -251,8 +251,11 @@ STATIC void setup_int_vectors(void)
       { 0x2f, FP_OFF(int2f_handler) }
     };
   struct vec *pvec;
+  struct lowvec FAR *plvec;
   int i;
 
+  for (plvec = intvec_table; plvec < intvec_table + 5; plvec++)
+    plvec->isv = getvec(plvec->intno);
   for (i = 0x23; i <= 0x3f; i++)
     setvec(i, empty_handler);
   for (pvec = vectors; pvec < vectors + (sizeof vectors/sizeof *pvec); pvec++)
diff --git a/kernel/segs.inc b/kernel/segs.inc
index ba6e123..a08ce71 100644
--- a/kernel/segs.inc
+++ b/kernel/segs.inc
@@ -39,7 +39,7 @@ CPU XCPU
 %endif
 
 group   PGROUP          PSP
-group   LGROUP          _LOWTEXT _IO_TEXT _IO_FIXED_DATA _TEXT
+group   LGROUP          _IRQTEXT _LOWTEXT _IO_TEXT _IO_FIXED_DATA _TEXT
 group   DGROUP          _FIXED_DATA _BSS _DATA _DATAEND CONST CONST2 DCONST DYN_DATA
 %ifdef WATCOM
 group   TGROUP          HMA_TEXT_START HMA_TEXT HMA_TEXT_END INIT_TEXT_START INIT_TEXT INIT_TEXT_END
@@ -51,6 +51,7 @@ group   I_GROUP         ID_B ID ID_E IC IDATA IB_B IB IB_E
 %endif
 
 segment PSP             class=PSP
+segment	_IRQTEXT	class=LCODE
 segment	_LOWTEXT	class=LCODE
 segment	_IO_TEXT	class=LCODE
 segment	_IO_FIXED_DATA	class=LCODE align=2