1 files changed, 42 insertions, 0 deletions
diff --git a/reference/C/CONTRIB/SNIP/coldboot.asm b/reference/C/CONTRIB/SNIP/coldboot.asm
new file mode 100755
index 0000000..828c79d
--- /dev/null
+++ b/reference/C/CONTRIB/SNIP/coldboot.asm
@@ -0,0 +1,42 @@
+; by: David Nugent via ECPROG echo
+;
+; works VERY reliably under all the protected mode environments I've
+; tried (namely DV and PC-MOS). Haven't tried VM386 or NX386 yet, but
+; I'm hopeful.... ;-)
+ 
+ 
+BIOS_POST  equ    0472H        ; POST (warm boot) flag
+ 
+ 
+        xor BX,BX               ; AL=1 for warm boot, 0 for cold
+        mov ES,BX
+        cmp AL,1
+        jnz @NcB
+        mov AX,1234H            ; Avoid POST
+@NcB:
+        mov ES:[BIOS_POST],AX   ; Install flag
+ 
+        cli                     ; Reboot
+        xor AX,AX
+        mov DS,AX
+        mov ES,AX
+        mov SS,AX
+        mov SP,AX
+@cP:
+        in AL,64H               ; Wait on AT keyboard controller
+        test AL,2
+        jne @cP
+ 
+        xor AL,AL               ; Try reset lines
+        out 64H,AL
+        iodelay
+        mov AL,0FEh
+        out 64H,AL
+        iodelay
+        mov AX,0002H            ; Jump to reset vector
+        push AX                 ; via IRET
+        mov AX,0F000H
+        push AX
+        mov AX,0FFF0H
+        push AX
+        iret