diff --git a/drivers/audio/vt823x.asm b/drivers/audio/vt823x.asm
index d8d85485ba..ae19e58dfb 100644
--- a/drivers/audio/vt823x.asm
+++ b/drivers/audio/vt823x.asm
@@ -12,19 +12,13 @@ DEBUG           equ 1
 
 API_VERSION     equ 0x01000100
 
-USE_COM_IRQ     equ 0    ;make irq 3 and irq 4 available for PCI devices
 IRQ_REMAP       equ 0
 IRQ_LINE        equ 0
 
 
-;irq 0,1,2,8,12,13 unavailable
+;irq 0,13 unavailable
 ;                   FEDCBA9876543210
-VALID_IRQ       equ 1100111011111000b
-ATTCH_IRQ       equ 0000111010100000b
-
-if USE_COM_IRQ
-ATTCH_IRQ       equ 0000111010111000b
-end if
+VALID_IRQ       equ 1101111111111110b
 
 CPU_FREQ        equ  2600d
 
@@ -388,10 +382,6 @@ proc START c, state:dword, cmdline:dword
         mov     esi, msgInvIRQ
         bt      eax, ebx
         jnc     .fail_msg
-        mov     eax, ATTCH_IRQ
-        mov     esi, msgAttchIRQ
-        bt      eax, ebx
-        jnc     .fail_msg
 
         invoke  AttachIntHandler, ebx, ac97_irq_VIA, 0
 .reg:
@@ -1238,7 +1228,6 @@ sz_sound_srv        db 'SOUND',0
 
 msgInit      db 'detect hardware...',13,10,0
 msgFail      db 'device not found',13,10,0
-msgAttchIRQ  db 'IRQ line not supported', 13,10, 0
 msgInvIRQ    db 'IRQ line not assigned or invalid', 13,10, 0
 msgPlay      db 'start play', 13,10,0
 msgStop      db 'stop play',  13,10,0