* [Qemu-devel] [Bug 1239008] Re: qemu fails to scroll screen on ^Vidmem output
2013-10-11 23:33 [Qemu-devel] [Bug 1239008] [NEW] qemu fails to scroll screen on ^Vidmem output rjasmin
@ 2013-11-28 2:24 ` Serge Hallyn
2013-11-29 12:50 ` rjasmin
2013-11-29 14:43 ` Serge Hallyn
` (4 subsequent siblings)
5 siblings, 1 reply; 9+ messages in thread
From: Serge Hallyn @ 2013-11-28 2:24 UTC (permalink / raw)
To: qemu-devel
Thanks for reporting this bug. Is there any other reproducer you can
give us?
** No longer affects: kvm (Ubuntu)
** Also affects: qemu (Ubuntu)
Importance: Undecided
Status: New
** Changed in: qemu (Ubuntu)
Status: New => Incomplete
** Changed in: qemu
Status: New => Incomplete
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1239008
Title:
qemu fails to scroll screen on ^Vidmem output
Status in QEMU:
Incomplete
Status in “qemu” package in Ubuntu:
Incomplete
Bug description:
Pascal uses ^Vidmem for B800 console output. The terminal does not
oblige the Pascal OS code to scroll the output. Virtualbox emulation
works, so this must be a qemu bug. Using QEMU in KVM mode as Ubuntu
LTS.
Source line to trip bug(in theory pushes VideoMem up one line):
procedure Scroll;
//this is whats causing crashes. FIXME:Virtualbox not affected.QEMU BUG?
begin
if scrolldisabled then exit;
if (CursorPosY >= 24) then begin //in case called before end of screen
blank:= $20 or (TextAttr shl 8);
Move((VidMem+(2*80))^,VidMem^,24*(2*80));
// Empty last line
FillWord((VidMem+(24*2*80))^,80,Blank);
CursorPosX:=1;
CursorPosY:=23;
update_cursor;
end;
end;
To manage notifications about this bug go to:
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^ permalink raw reply [flat|nested] 9+ messages in thread* Re: [Qemu-devel] [Bug 1239008] Re: qemu fails to scroll screen on ^Vidmem output
2013-11-28 2:24 ` [Qemu-devel] [Bug 1239008] " Serge Hallyn
@ 2013-11-29 12:50 ` rjasmin
0 siblings, 0 replies; 9+ messages in thread
From: rjasmin @ 2013-11-29 12:50 UTC (permalink / raw)
To: qemu-devel
I dont know how to write it myself, but the original kernel scrolling
code is in C.
Might try OSDev forums. Not that I know of.
On 11/27/2013 09:24 PM, Serge Hallyn wrote:
> Thanks for reporting this bug. Is there any other reproducer you can
> give us?
>
> ** No longer affects: kvm (Ubuntu)
>
> ** Also affects: qemu (Ubuntu)
> Importance: Undecided
> Status: New
>
> ** Changed in: qemu (Ubuntu)
> Status: New => Incomplete
>
> ** Changed in: qemu
> Status: New => Incomplete
>
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1239008
Title:
qemu fails to scroll screen on ^Vidmem output
Status in QEMU:
Incomplete
Status in “qemu” package in Ubuntu:
Incomplete
Bug description:
Pascal uses ^Vidmem for B800 console output. The terminal does not
oblige the Pascal OS code to scroll the output. Virtualbox emulation
works, so this must be a qemu bug. Using QEMU in KVM mode as Ubuntu
LTS.
Source line to trip bug(in theory pushes VideoMem up one line):
procedure Scroll;
//this is whats causing crashes. FIXME:Virtualbox not affected.QEMU BUG?
begin
if scrolldisabled then exit;
if (CursorPosY >= 24) then begin //in case called before end of screen
blank:= $20 or (TextAttr shl 8);
Move((VidMem+(2*80))^,VidMem^,24*(2*80));
// Empty last line
FillWord((VidMem+(24*2*80))^,80,Blank);
CursorPosX:=1;
CursorPosY:=23;
update_cursor;
end;
end;
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1239008/+subscriptions
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Qemu-devel] [Bug 1239008] Re: qemu fails to scroll screen on ^Vidmem output
2013-10-11 23:33 [Qemu-devel] [Bug 1239008] [NEW] qemu fails to scroll screen on ^Vidmem output rjasmin
2013-11-28 2:24 ` [Qemu-devel] [Bug 1239008] " Serge Hallyn
@ 2013-11-29 14:43 ` Serge Hallyn
2015-06-17 17:11 ` Chris J Arges
` (3 subsequent siblings)
5 siblings, 0 replies; 9+ messages in thread
From: Serge Hallyn @ 2013-11-29 14:43 UTC (permalink / raw)
To: qemu-devel
** Changed in: qemu (Ubuntu)
Status: Incomplete => New
** Changed in: qemu
Status: Incomplete => New
** Changed in: qemu (Ubuntu)
Importance: Undecided => Low
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1239008
Title:
qemu fails to scroll screen on ^Vidmem output
Status in QEMU:
New
Status in “qemu” package in Ubuntu:
New
Bug description:
Pascal uses ^Vidmem for B800 console output. The terminal does not
oblige the Pascal OS code to scroll the output. Virtualbox emulation
works, so this must be a qemu bug. Using QEMU in KVM mode as Ubuntu
LTS.
Source line to trip bug(in theory pushes VideoMem up one line):
procedure Scroll;
//this is whats causing crashes. FIXME:Virtualbox not affected.QEMU BUG?
begin
if scrolldisabled then exit;
if (CursorPosY >= 24) then begin //in case called before end of screen
blank:= $20 or (TextAttr shl 8);
Move((VidMem+(2*80))^,VidMem^,24*(2*80));
// Empty last line
FillWord((VidMem+(24*2*80))^,80,Blank);
CursorPosX:=1;
CursorPosY:=23;
update_cursor;
end;
end;
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1239008/+subscriptions
^ permalink raw reply [flat|nested] 9+ messages in thread* [Qemu-devel] [Bug 1239008] Re: qemu fails to scroll screen on ^Vidmem output
2013-10-11 23:33 [Qemu-devel] [Bug 1239008] [NEW] qemu fails to scroll screen on ^Vidmem output rjasmin
2013-11-28 2:24 ` [Qemu-devel] [Bug 1239008] " Serge Hallyn
2013-11-29 14:43 ` Serge Hallyn
@ 2015-06-17 17:11 ` Chris J Arges
2015-06-17 22:19 ` rjasmin
2017-10-28 14:24 ` Thomas Huth
` (2 subsequent siblings)
5 siblings, 1 reply; 9+ messages in thread
From: Chris J Arges @ 2015-06-17 17:11 UTC (permalink / raw)
To: qemu-devel
Can you test with the latest version to see if this still affects you?
If this still is a problem, any information on how to obtain the Guest OS in question that would also be helpful.
** Changed in: qemu (Ubuntu)
Status: New => Incomplete
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1239008
Title:
qemu fails to scroll screen on ^Vidmem output
Status in QEMU:
New
Status in qemu package in Ubuntu:
Incomplete
Bug description:
Pascal uses ^Vidmem for B800 console output. The terminal does not
oblige the Pascal OS code to scroll the output. Virtualbox emulation
works, so this must be a qemu bug. Using QEMU in KVM mode as Ubuntu
LTS.
Source line to trip bug(in theory pushes VideoMem up one line):
procedure Scroll;
//this is whats causing crashes. FIXME:Virtualbox not affected.QEMU BUG?
begin
if scrolldisabled then exit;
if (CursorPosY >= 24) then begin //in case called before end of screen
blank:= $20 or (TextAttr shl 8);
Move((VidMem+(2*80))^,VidMem^,24*(2*80));
// Empty last line
FillWord((VidMem+(24*2*80))^,80,Blank);
CursorPosX:=1;
CursorPosY:=23;
update_cursor;
end;
end;
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1239008/+subscriptions
^ permalink raw reply [flat|nested] 9+ messages in thread* Re: [Qemu-devel] [Bug 1239008] Re: qemu fails to scroll screen on ^Vidmem output
2015-06-17 17:11 ` Chris J Arges
@ 2015-06-17 22:19 ` rjasmin
0 siblings, 0 replies; 9+ messages in thread
From: rjasmin @ 2015-06-17 22:19 UTC (permalink / raw)
To: qemu-devel
It is hosted on google code, a dying service. FreePascal(coffee) OS.A
more basic version is posted there.I assume it works as the version that
I last built did not for some reason. Sources should be there via
subversion checkout.Thats what I tested with.
https://code.google.com/p/coffee-os/
It uses a basic VRAM scroll buffer and writes to it.
Examples are found elsewhere in C. (OS Dev pages)
Im in the middle of a fedup upgrade at the moment, but will see what I
can do.
On 06/17/2015 12:11 PM, Chris J Arges wrote:
> Can you test with the latest version to see if this still affects you?
> If this still is a problem, any information on how to obtain the Guest OS in question that would also be helpful.
>
> ** Changed in: qemu (Ubuntu)
> Status: New => Incomplete
>
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1239008
Title:
qemu fails to scroll screen on ^Vidmem output
Status in QEMU:
New
Status in qemu package in Ubuntu:
Incomplete
Bug description:
Pascal uses ^Vidmem for B800 console output. The terminal does not
oblige the Pascal OS code to scroll the output. Virtualbox emulation
works, so this must be a qemu bug. Using QEMU in KVM mode as Ubuntu
LTS.
Source line to trip bug(in theory pushes VideoMem up one line):
procedure Scroll;
//this is whats causing crashes. FIXME:Virtualbox not affected.QEMU BUG?
begin
if scrolldisabled then exit;
if (CursorPosY >= 24) then begin //in case called before end of screen
blank:= $20 or (TextAttr shl 8);
Move((VidMem+(2*80))^,VidMem^,24*(2*80));
// Empty last line
FillWord((VidMem+(24*2*80))^,80,Blank);
CursorPosX:=1;
CursorPosY:=23;
update_cursor;
end;
end;
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1239008/+subscriptions
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Qemu-devel] [Bug 1239008] Re: qemu fails to scroll screen on ^Vidmem output
2013-10-11 23:33 [Qemu-devel] [Bug 1239008] [NEW] qemu fails to scroll screen on ^Vidmem output rjasmin
` (2 preceding siblings ...)
2015-06-17 17:11 ` Chris J Arges
@ 2017-10-28 14:24 ` Thomas Huth
2017-12-28 4:17 ` Launchpad Bug Tracker
2017-12-28 4:17 ` Launchpad Bug Tracker
5 siblings, 0 replies; 9+ messages in thread
From: Thomas Huth @ 2017-10-28 14:24 UTC (permalink / raw)
To: qemu-devel
Triaging old bug tickets... can you still reproduce this issue with the
latest version of QEMU? Or could we close this ticket nowadays?
** Changed in: qemu
Status: New => Incomplete
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1239008
Title:
qemu fails to scroll screen on ^Vidmem output
Status in QEMU:
Incomplete
Status in qemu package in Ubuntu:
Incomplete
Bug description:
Pascal uses ^Vidmem for B800 console output. The terminal does not
oblige the Pascal OS code to scroll the output. Virtualbox emulation
works, so this must be a qemu bug. Using QEMU in KVM mode as Ubuntu
LTS.
Source line to trip bug(in theory pushes VideoMem up one line):
procedure Scroll;
//this is whats causing crashes. FIXME:Virtualbox not affected.QEMU BUG?
begin
if scrolldisabled then exit;
if (CursorPosY >= 24) then begin //in case called before end of screen
blank:= $20 or (TextAttr shl 8);
Move((VidMem+(2*80))^,VidMem^,24*(2*80));
// Empty last line
FillWord((VidMem+(24*2*80))^,80,Blank);
CursorPosX:=1;
CursorPosY:=23;
update_cursor;
end;
end;
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1239008/+subscriptions
^ permalink raw reply [flat|nested] 9+ messages in thread* [Qemu-devel] [Bug 1239008] Re: qemu fails to scroll screen on ^Vidmem output
2013-10-11 23:33 [Qemu-devel] [Bug 1239008] [NEW] qemu fails to scroll screen on ^Vidmem output rjasmin
` (3 preceding siblings ...)
2017-10-28 14:24 ` Thomas Huth
@ 2017-12-28 4:17 ` Launchpad Bug Tracker
2017-12-28 4:17 ` Launchpad Bug Tracker
5 siblings, 0 replies; 9+ messages in thread
From: Launchpad Bug Tracker @ 2017-12-28 4:17 UTC (permalink / raw)
To: qemu-devel
[Expired for QEMU because there has been no activity for 60 days.]
** Changed in: qemu
Status: Incomplete => Expired
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1239008
Title:
qemu fails to scroll screen on ^Vidmem output
Status in QEMU:
Expired
Status in qemu package in Ubuntu:
Expired
Bug description:
Pascal uses ^Vidmem for B800 console output. The terminal does not
oblige the Pascal OS code to scroll the output. Virtualbox emulation
works, so this must be a qemu bug. Using QEMU in KVM mode as Ubuntu
LTS.
Source line to trip bug(in theory pushes VideoMem up one line):
procedure Scroll;
//this is whats causing crashes. FIXME:Virtualbox not affected.QEMU BUG?
begin
if scrolldisabled then exit;
if (CursorPosY >= 24) then begin //in case called before end of screen
blank:= $20 or (TextAttr shl 8);
Move((VidMem+(2*80))^,VidMem^,24*(2*80));
// Empty last line
FillWord((VidMem+(24*2*80))^,80,Blank);
CursorPosX:=1;
CursorPosY:=23;
update_cursor;
end;
end;
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1239008/+subscriptions
^ permalink raw reply [flat|nested] 9+ messages in thread* [Qemu-devel] [Bug 1239008] Re: qemu fails to scroll screen on ^Vidmem output
2013-10-11 23:33 [Qemu-devel] [Bug 1239008] [NEW] qemu fails to scroll screen on ^Vidmem output rjasmin
` (4 preceding siblings ...)
2017-12-28 4:17 ` Launchpad Bug Tracker
@ 2017-12-28 4:17 ` Launchpad Bug Tracker
5 siblings, 0 replies; 9+ messages in thread
From: Launchpad Bug Tracker @ 2017-12-28 4:17 UTC (permalink / raw)
To: qemu-devel
[Expired for qemu (Ubuntu) because there has been no activity for 60
days.]
** Changed in: qemu (Ubuntu)
Status: Incomplete => Expired
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1239008
Title:
qemu fails to scroll screen on ^Vidmem output
Status in QEMU:
Expired
Status in qemu package in Ubuntu:
Expired
Bug description:
Pascal uses ^Vidmem for B800 console output. The terminal does not
oblige the Pascal OS code to scroll the output. Virtualbox emulation
works, so this must be a qemu bug. Using QEMU in KVM mode as Ubuntu
LTS.
Source line to trip bug(in theory pushes VideoMem up one line):
procedure Scroll;
//this is whats causing crashes. FIXME:Virtualbox not affected.QEMU BUG?
begin
if scrolldisabled then exit;
if (CursorPosY >= 24) then begin //in case called before end of screen
blank:= $20 or (TextAttr shl 8);
Move((VidMem+(2*80))^,VidMem^,24*(2*80));
// Empty last line
FillWord((VidMem+(24*2*80))^,80,Blank);
CursorPosX:=1;
CursorPosY:=23;
update_cursor;
end;
end;
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1239008/+subscriptions
^ permalink raw reply [flat|nested] 9+ messages in thread