HP OmniBook 800CT support utilities \ VOGONS

HP OmniBook 800CT support utilities

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First post, by bttr

Posted on 2020-05-04, 11:55

bttr Offline

Rank Newbie

Rank: Newbie
Posts: 57
Joined: 2006-04-19, 15:56
Location: Berlin, Germany

Hi!

I'm the proud owner of two 800CTs: One with a P100 and 16MB RAM, the other with P166MMX and 48MB RAM.
Recently I fiddled around with the OmniBook Support Utility Disk and found three tiny tools there: DOCK.COM, EXTFLOP.COM, and IDE.COM

DOCK.COM source code

1CSEG
2
3RS	100h
4
5	; --- Read status.
6	in	al, 66h
7
8	; === Use bit 4 only as return code.
9	; --- Make bit 4 the lowest bit.
10	ror	al, 1
11	ror	al, 1
12	ror	al, 1
13	ror	al, 1
14	; --- Kill all the upper bits.
15	and	al, 1
16
17	; --- Call DOS function "TERMINATE WITH RETURN CODE".
18	mov	ah, 4Ch
19	int	21h
20
21END

EXTFLOP.COM source code

1CSEG
2
3RS	100h
4
5	; --- Read status.
6	in	al, 67h
7
8	; === Use bit 3 only as return code.
9	; --- Make bit 3 the lowest bit.
10	ror	al, 1
11	ror	al, 1
12	ror	al, 1
13	; --- Kill all the upper bits.
14	and	al, 1
15
16	; --- Call DOS function "TERMINATE WITH RETURN CODE".
17	mov	ah, 4Ch
18	int	21h
19
20END

IDE.COM source code

1CSEG
2
3RS	100h
4
5	; --- Read status.
6	in	al, 67h
7
8	; === Use bit 2 only as return code.
9	; --- Make bit 2 the lowest bit.
10	ror	al, 1
11	ror	al, 1
12	; --- Kill all the upper bits.
13	and	al, 1
14
15	; --- Call DOS function "TERMINATE WITH RETURN CODE".
16	mov	ah, 4Ch
17	int	21h
18
19END

Source code is for the R86 assembler, which is part of http://www.lsi-j.co.jp/freesoft/. Don't ask, I just like R86.
But this source code is easy to convert to NASM or even DEBUG.

Now my problem is, these tools don't work for me.
Whatever I try, ports 66h and 67h always return FFh. I also verified with DEBUG.

Okay, EXTFLOP.COM is never called from the Utility Disk, but DOCK.COM is.
(I didn't try IDE.COM, as it also reads the same status byte EXTFLOP.COM.)

What I already tried:

1Setup                        | 66h | 67h
2-----------------------------+-----+----
3800/166 BIOS 2.01.00 gr      | --- | ---
4  Boot from HDD              | --- | ---
5    FDD not connected        | FFh | FFh
6    FDD connected (hot-plug) | FFh | FFh
7  Boot from FDD              | FFh | FFh
8  Boot from HDD (docked)     | --- | ---
9    FDD not connected        | FFh | FFh
10    FDD connected (hot-plug) | FFh | FFh
11  Boot from FDD (docked)     | FFh | FFh
12-----------------------------+-----+----
13800/100 BIOS 2.00.00 en      | --- | ---
14  Boot from FDD (docked)     | FFh | FFh

Am I doing something wrong?

Would be nice, if some other people could try on their own machines.
OmniBooks 300, 425, 430, 530, 600, are probably worth to try own too.

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