Date: Sat, 7 Nov 1998 00:45:53 +0200 (SAT) From: Robert Nordier <rnordier@nordier.com> To: abial@nask.pl (Andrzej Bialecki) Cc: mike@smith.net.au, jkh@time.cdrom.com, rnordier@nordier.com, chuckr@mat.net, freebsd-current@FreeBSD.ORG Subject: Re: ficl Message-ID: <199811062245.AAA04580@ceia.nordier.com> In-Reply-To: <Pine.BSF.4.02A.9811062153200.23415-100000@korin.warman.org.pl> from Andrzej Bialecki at "Nov 6, 98 09:59:46 pm"
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Andrzej Bialecki wrote:
>
> I have a question concerning at-xy, cls, and perhaps get-xy words. They
> are clearly arch dependent, so if I come to implementing them (I said:
> "IF" ;-), where I should add them? And, is this so simple as
> vidc_getchar() suggests?
I'd suppose in libi386/vidconsole.c.
The actual primitive should be fairly simple, anyway. One way to clear
(actually reinitialize) the screen is to "get video mode, set video
mode" (mov ah,0xf; int 0x10; and ax,0x7f; int 0x10), so:
static void
vidc_cls(void)
{
v86.ctl = 0;
v86.addr = 0x10;
v86.eax = 0xf << 8;
v86int();
v86.eax &= 0x7f;
v86int();
}
I suppose that, at least with the present struct console, you'd need
to complicate the present vidc_putchar() and vidc_getchar()
considerably, though.
--
Robert Nordier
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