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Soundcard disappears on warm boot

Posted on 1997-12-13
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Last Modified: 2013-12-16
When I first start my computer, everything works fine, but if I warm boot (reboot without restarting my computer), my sound card and it's IRQ disappear. If I completely shut down, turn off the computer, restart it, it works fine.  What is happening and how do I fix it. Thanks
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Question by:daleboyd
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smeebud earned 100 total points
ID: 1752513
When you re-boot without restarting your buffers/ram/swapfile
are not cleared and your computer get's confused.
When troubleshooting it's always advised that you shutdown/power-off for 10 to 15 seconds. Then Boot;
Here is the Bootstrap sequence:
-------
BootStrap; Phase 1, 2, 3 and 4
                           Phase 1:  Hardware phase
                                       
Power supply stabilizes voltages, asserts Power Good line to mobo
CPU rolls; hds, fans and some other devices initialize themselves
                                       
                         Phase 2:  BIOS hardware phase

BIOS initializes, checks crucial hardware, checks CMOS checksum
Searches UMBs for ROM signatures, passes control to init (VGA splash)
Loads chipset settings, sizes/checks RAM, builds equipment list (POST)
BIOS splash screen displayed
PnP extension queries and activates devices, checks ESCD data
PnP-identified devices explained
If changes, ESCD data is rebuilt (Updating ESCD...)
Checks "advanced" CMOS for boot device test order
Tests each device for boot signature end of 1st sector
If finds boot signature, loads that sector and jumps into it
Else jumps to IBM cassette BASIC or "No ROM BASIC" etc.
                                       
                       Phase 3:  Master Boot Record phase

It is at this point that EZIDE, Disk Manager, some viruses etc. run
If diskette, boot sector loads OS however it chooses; IO.sys etc.
If hd, partition table's 4 entries checked for marker with bit 7 set
Error if no active partition found
Else active partition table entry consulted for start address
Check for boot sector marker at end 1st sector of partition
Error if not found
Else jumps into 1st sector of partition
                                       
                        Phase 4:  Operating system phase

From here on, what happens depends on the operating system
It is at this point the other "pre-file" viruses run
Case of successfully-installed Win95 will be described
Partition loader loads IO.sys; "Windows 95 is loading..."
Win95's IO.sys will interpret MSDOS.sys settings, act accordingly
If no Fn keystroke or bad exit to the contrary, interprets Config.sys
Initial interpretation of registry (*** here or where?)
If no DOS=NoAuto, will set and load Win95 auto defaults as per:
LastDriveHigh
FilesHigh
BuffersHigh
StacksHigh
FCBSHigh
DOS=UMB,High (NB if Single, UMB only possible if Emm386 loads)
Set Prompt=$p$g (*** here or earlier?)
Set Path={winbasedir};{winbasedir}\Command (*** here or earlier?)
Device={winbasedir}\HiMem.sys
DeviceHigh={winbasedir}\IFSHlp.sys
DeviceHigh={winbasedir}\SetVer.exe
Rest of Config.sys interpreted
Check for C:\AutoExec.bat; if exists, Command.com loaded to interpret
If no DOS=Single (Config.sys) or BootGUI=0 (MSDOS.sys), Win.com loads
(*** from this point on, exact order of events unclear; ### waypoints)
Win.com displays {winbasedir}\Logo.sys (*** here or earlier?) (###)
Registry drivers, PnP etc. loaded
System.ini drivers etc. loaded
Desktop paints in, mouse pointer; Task Manager is clickable (###)
Logon dialog appears, if appropriate (###)
0th instance Explorer launches, desktop icons, Desktop clickable (###)
Registry Run, RunOnce, RunServices, RunServicesOnce interpreted
Win.ini Run= and Load= interpreted
"Welcome to Windows" dialog launched, unless suppressed (###)
{start menu}\StartUp group items launched

At this point, boot process is complete.
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