'===========================================================================
' Subject: HOW TO USE POKE                   Date: 03-17-97 (11:35)       
' Author:  Benjamin L. McGee                 Code: QB, QBasic, PDS        
' Origin:  FidoNet QUIK_BAS Echo           Packet: FAQS.ABC
'===========================================================================
' > ... I'm a little paranoid about using the POKE and PEEK 
' > commands (mainly POKE, though). How will I know where to 
' > POKE into and exactly what can I accomplish by POKEing there? 
 
'From Ralf Brown's Interrupt list MEMORY.LST 
 
' ----------M0400072-------------------------- 
' MEM 0040h:072h - POST RESET FLAG 
' Size:   WORD 
' Desc:   speify the action the BIOS should take at the beinning of the 
'         power-on self-test when the machine is reset 
 
'(Table M020) 
'Values for POST reset flag: 
'     0000h  cold boot 
'     0064h  Burn-n mode 
'     1234h  to bypass memory test (warm boot) 
'     4321h  [PS/2 except Mod 25,30] to preserve mmory 
'     5678h  [Conv] system suspended 
'     9ABCh  [Conv] manufacturing test mode 
'     ABCDh  [Conv] POST loop mode 
 
 
' ---------- WARMBOOT.BAS ---------- 
'$INCLUDE: 'qbx.bi' 
 
DEF SEG = &H40 
POKE &H72, &H34 
POKE &H73, &H12 
 
DEF SEG = &HFFFF 
CALL Absolute(&H0) 
 
' ---------- COLDBOOT.BAS ---------- 
'$INCLUDE: 'qbx.bi' 
 
DEF SEG = &H40 
POKE &H72, &H0 
POKE &H73, &H0 
 
DEF SEG = &HFFFF 
CALL Absolute(&H0) 
 
'There are, no doubt, many other useful memory locations that 
'you can POKE values into.  A good reference is as valuable as 
'gold.  Hope that helps...