24 Mar
2006
24 Mar
'06
10:20 p.m.
OK. The models from the LX100 and up do have a cutom Intel "Hornet" chip,
but it is an 80186 at its heart.
There is a block diagram of the Hornet at
http://www.daniel-hertrich.de/200lx/block.pdf. There is more about the
Hornet at http://www.daniel-hertrich.de/200lx/, about half way down the
page, under the heading "The Hornet chip (CPU) and block diagram".
Bob
Message: 22
Date: Fri, 24 Mar 2006 06:11:57 -0800 (PST)
From: Cameron Kaiser <spectre at floodgap.com>
Subject: Re: who built the first 8086/88 based puter?
I have an HP 100LX. Unfortunately, HP 100LX or 200LX
does NOT use an 80186
or 80188 or 80c186 or 80c188 or any other 80186 compatible chips. It uses
an
PC compatible Intel integrated CPU, with integrated CGA controller,
integrated 8259 compatible interrupt controller, and some other
controllers
as well.
But Bob is right about the 95LX -- I have one of those and it *is* a '186.
24 Mar
24 Mar
11:43 p.m.
On 3/24/2006 at 9:20 PM Robert Feldman wrote:
OK. The models from the LX100 and up do have a cutom
Intel "Hornet" chip,
but it is an 80186 at its heart.
Well, yes and no, I think. The 80186 has a unique interrupt controller,
timer and serial I/O facility. The Hornet looks like these were replaced
with more conventional functional blocks (e.g., instead of the 80186 timer,
Intel placed a 8254 compatible unit). I'd say that it's an 80186 only in
the sense that it has the same instruction set and basic CPU control. But
the peripherals are another story.
Cheers,
Chuck
25 Mar
25 Mar
4:47 p.m.
On Fri, 24 Mar 2006, Robert Feldman wrote:
OK. The models from the LX100 and up do have a cutom
Intel "Hornet" chip,
but it is an 80186 at its heart.
There is a block diagram of the Hornet at
http://www.daniel-hertrich.de/200lx/block.pdf. There is more about the
Hornet at http://www.daniel-hertrich.de/200lx/, about half way down the
page, under the heading "The Hornet chip (CPU) and block diagram".
Is there a way in software to determine whether that is present v a
conventional 80186?
5:30 p.m.
On 3/25/2006 at 1:47 PM Fred Cisin wrote:
Is there a way in software to determine whether that is
present v a
conventional 80186?
Hmmm, maybe. The problem is the "pull the hole in after yourself"
relocation mechanism of the peripheral control block. Assuming that the
startup code in the BIOS didn't fool with the relocation register, you
could just read the contents of the control block starting at I/O address
FF00. You could also search for it in I/O space by this method:
unsigned k;
for ( k = 0; k < 256; k++)
{
if ( (inpw( (k << 8) + 254) & 0xfff) == k)
printf( "Looks like the control block starts at I/O address %x\n", k <<
8);
}
You could also search memory space in much the same way, if the BIOS has
decided to relocate it to memory space instead.
If you find it, then you can twiddle the onboard peripherals to see what
you've got. My guess is that the Hornet won't have the 186-style timers
or PIC.
Cheers,
Chuck
6676
days inactive
6676
days old
3 comments
3 participants
participants (3)
-
cclist＠sydex.com -
cisin＠xenosoft.com -
r_a_feldman＠hotmail.com