* [Qemu-devel] VGA 2bit mode
@ 2008-04-25 18:04 Samuel Thibault
2008-04-28 10:30 ` [Qemu-devel] " Samuel Thibault
0 siblings, 1 reply; 3+ messages in thread
From: Samuel Thibault @ 2008-04-25 18:04 UTC (permalink / raw)
To: qemu-devel
Hello,
I don't have a VGA book right here to check, but I don't understand
vga_draw_line2_:
d += BPP * 8;
s += 4;
i.e. 4 bytes for 8 pixels and vga_draw_line4_:
d += BPP * 8;
s += 4;
i.e. 4 bytes for 8 pixels too. Does VGA 2bit mode voluntarily waste
memory?
Samuel
^ permalink raw reply [flat|nested] 3+ messages in thread* [Qemu-devel] Re: VGA 2bit mode 2008-04-25 18:04 [Qemu-devel] VGA 2bit mode Samuel Thibault @ 2008-04-28 10:30 ` Samuel Thibault 2008-04-28 14:03 ` Stuart Brady 0 siblings, 1 reply; 3+ messages in thread From: Samuel Thibault @ 2008-04-28 10:30 UTC (permalink / raw) To: qemu-devel Answering to myself: Samuel Thibault, le Fri 25 Apr 2008 19:04:06 +0100, a écrit : > I don't have a VGA book right here to check, but I don't understand > vga_draw_line2_: > > d += BPP * 8; > s += 4; > > i.e. 4 bytes for 8 pixels and vga_draw_line4_: > > d += BPP * 8; > s += 4; > > i.e. 4 bytes for 8 pixels too. Does VGA 2bit mode voluntarily waste > memory? Looks like it does, yes. Samuel ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [Qemu-devel] Re: VGA 2bit mode 2008-04-28 10:30 ` [Qemu-devel] " Samuel Thibault @ 2008-04-28 14:03 ` Stuart Brady 0 siblings, 0 replies; 3+ messages in thread From: Stuart Brady @ 2008-04-28 14:03 UTC (permalink / raw) To: qemu-devel On Mon, Apr 28, 2008 at 11:30:06AM +0100, Samuel Thibault wrote: > Answering to myself: > > > Does VGA 2bit mode voluntarily waste memory? > > Looks like it does, yes. Of course, if the comment explaining this were not missing, you would not need to ask the question. :-) -- Stuart Brady ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2008-04-28 14:03 UTC | newest] Thread overview: 3+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2008-04-25 18:04 [Qemu-devel] VGA 2bit mode Samuel Thibault 2008-04-28 10:30 ` [Qemu-devel] " Samuel Thibault 2008-04-28 14:03 ` Stuart Brady
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