9 Dec
2012
9 Dec
'12
1:23 p.m.
I am not sure if this is on-topic since the machine involved was sold as
a calculaotr. On the other hand, it programs in BASIC, it's getting on
for 40 yuears old, and I am thinking of adding a hard disk. Classic computer?
The HP9880 is the hard disk (14" platters) for the HP9830 'calculator'. I
am slowly gathering the various bits of this system, I would love to get
it all working again.
As I understnad it, you need :
An HP9830 calculator,
HP9866 printer
Mass Memory ROM module
HP11273B 'cable' from the HP9830 to the controller
HP11305 disk controller
HP11302 cable from the controlelr to the drive
HP7900A disk drive (one fixed, oen removeable plater) + PSU (or HP7901,
which has only the removeable platter, but has an internal PSU)
System tape cassette for the HP9830
Disk packs (of course).
Now, The 9830 and 9866 I have, working. The HP11305 controller and both
'cables' (I put that in quotes becase thes cable assembleis have PSBs
stuffed with ICs at at elast one end -- the 11273 has over 50 ICs in it)
I also have, untested, but I know th PSU is good and the microcde ROMs
look OPK (the disassebmyl of the mcirocode makes sense). Since everything
else is standard TTL, analogue or RAMs ICs, I think that's reparaiable if
necessary. I have the scheamtics and micorocde source for all that.
The HP9800e emulator includes a dumo of the Mass Memory ROM, and thus I
have it in an EPROM module.
That emualtor also has an image of the ssytem and service tapes for the
9880, but as yet I haven'tt figured out the format of the image file or
how to get them back onto physicl cassettes. I do have another tape drive
mechansim (not HP) which sould be able to produce compatible tapes 'Just'
a little matter of figuring out how ot interface it to soemthign and use
it. At least I ahve the handbook for said drive, it includes timeing
diagrams and schematics.
Which leaves the drive and packs. This is the problem, I susepct I do
havev a 7900A. Alas it was in a skip (dumpster) and had a 2100A thrown on
top of it. The 2100A survived. THe 7900A is more sdubious. The front was
samaged when it was gtaken out of the rack too. It's missing the
terminator and the little card edge conenctor PCB, but those are easy to
make I think.
It's going ot need work. I also don't have the PSU for it. This seems ot
be 120C AC (not isolated from the mains) for the blower and spindle
motros), unregualted +/-24V and regulated +5V, +/-12V. Nothing difficult,
but I can see myself speding time and moeny making something and then
find the heads will no logner fly. I susepct replacement heads are not
exactly common, I wonder if RK05 heads can me made ot fit?
According to the HP nanual for the drive, there was a text/service unti
for this drive, it conencted ot the side of the backplane. I cna't
rememebr the model numebr (HP13219?). Hase anyone ever seen one, or have
the manuals for it?
And now for the pack. It's the same physicla size as the RK05 pack, but
24 (hard) sectors. Of coruse there's the fixed platter in the 7900A drive
with it's own 24 sector hard dsetoy rign nad transducer. I belived the
drive will spin up with any pack in it, so I could put a 'scratch' 12
sector RK05 in there to (a) see if the heads will fly and (b) see if I
can use the fixed paltter (which will be 24 sector) drom the HP9830.
If I get that far, I guess I then take an RK05 pack apart and attempt to
put anotehr 12 notches i nthe sector ring. I beleive I then have to
re-centre the platter on the hub which will be 'interesting'
What if the heads crash? Maybe try to fit RK05 heads (I have some brand
new spares here). Maybe try to interface an RK03 or RK05 to the HP
contorller. The interface is differnet, but at least the data rate is the
same. It woudl take a bit of logic to get it to work, but... If all else
fails, make a solid-state repalcement for the drive?
I gueess the questions at the momnet are :
Anyone know the precise details of the tape image file format for 9800e?
Anyone ever manage to fit RK05 heads into an HP7900?
Anyone ever managed to cut the ectra sector notches?
Anything knwon about the disk service unit for the HP7900?
Does anyone have any comments/thoughts. Am I totally crazy for trying to
do this?
-tony
9 Dec
9 Dec
11:56 p.m.
Tony,
I'm pretty sure we have all of the above, though not in working order. However, if you
need photos or a chance to study the kit, I'm sure we can help. I know we also have an
HP video on about it which covers some setup and maintenance.
I'd be only too pleased to repay your kind assistance to us.
ard at p850ug1.demon.co.uk wrote:
I am not sure if this is on-topic since the machine
involved was sold
as
a calculaotr. On the other hand, it programs in BASIC, it's getting on
for 40 yuears old, and I am thinking of adding a hard disk. Classic
computer?
The HP9880 is the hard disk (14" platters) for the HP9830 'calculator'.
I
am slowly gathering the various bits of this system, I would love to
get
it all working again.
As I understnad it, you need :
An HP9830 calculator,
HP9866 printer
Mass Memory ROM module
HP11273B 'cable' from the HP9830 to the controller
HP11305 disk controller
HP11302 cable from the controlelr to the drive
HP7900A disk drive (one fixed, oen removeable plater) + PSU (or HP7901,
which has only the removeable platter, but has an internal PSU)
System tape cassette for the HP9830
Disk packs (of course).
Now, The 9830 and 9866 I have, working. The HP11305 controller and both
'cables' (I put that in quotes becase thes cable assembleis have PSBs
stuffed with ICs at at elast one end -- the 11273 has over 50 ICs in
it)
I also have, untested, but I know th PSU is good and the microcde ROMs
look OPK (the disassebmyl of the mcirocode makes sense). Since
everything
else is standard TTL, analogue or RAMs ICs, I think that's reparaiable
if
necessary. I have the scheamtics and micorocde source for all that.
The HP9800e emulator includes a dumo of the Mass Memory ROM, and thus I
have it in an EPROM module.
That emualtor also has an image of the ssytem and service tapes for
the
9880, but as yet I haven'tt figured out the format of the image file or
how to get them back onto physicl cassettes. I do have another tape
drive
mechansim (not HP) which sould be able to produce compatible tapes
'Just'
a little matter of figuring out how ot interface it to soemthign and
use
it. At least I ahve the handbook for said drive, it includes timeing
diagrams and schematics.
Which leaves the drive and packs. This is the problem, I susepct I do
havev a 7900A. Alas it was in a skip (dumpster) and had a 2100A thrown
on
top of it. The 2100A survived. THe 7900A is more sdubious. The front
was
samaged when it was gtaken out of the rack too. It's missing the
terminator and the little card edge conenctor PCB, but those are easy
to
make I think.
It's going ot need work. I also don't have the PSU for it. This seems
ot
be 120C AC (not isolated from the mains) for the blower and spindle
motros), unregualted +/-24V and regulated +5V, +/-12V. Nothing
difficult,
but I can see myself speding time and moeny making something and then
find the heads will no logner fly. I susepct replacement heads are not
exactly common, I wonder if RK05 heads can me made ot fit?
According to the HP nanual for the drive, there was a text/service unti
for this drive, it conencted ot the side of the backplane. I cna't
rememebr the model numebr (HP13219?). Hase anyone ever seen one, or
have
the manuals for it?
And now for the pack. It's the same physicla size as the RK05 pack, but
24 (hard) sectors. Of coruse there's the fixed platter in the 7900A
drive
with it's own 24 sector hard dsetoy rign nad transducer. I belived the
drive will spin up with any pack in it, so I could put a 'scratch' 12
sector RK05 in there to (a) see if the heads will fly and (b) see if I
can use the fixed paltter (which will be 24 sector) drom the HP9830.
If I get that far, I guess I then take an RK05 pack apart and attempt
to
put anotehr 12 notches i nthe sector ring. I beleive I then have to
re-centre the platter on the hub which will be 'interesting'
What if the heads crash? Maybe try to fit RK05 heads (I have some brand
new spares here). Maybe try to interface an RK03 or RK05 to the HP
contorller. The interface is differnet, but at least the data rate is
the
same. It woudl take a bit of logic to get it to work, but... If all
else
fails, make a solid-state repalcement for the drive?
I gueess the questions at the momnet are :
Anyone know the precise details of the tape image file format for
9800e?
Anyone ever manage to fit RK05 heads into an HP7900?
Anyone ever managed to cut the ectra sector notches?
Anything knwon about the disk service unit for the HP7900?
Does anyone have any comments/thoughts. Am I totally crazy for trying
to
do this?
-tony
-- Colin
10 Dec
10 Dec
12:04 p.m.
Tony,
I'm pretty sure we have all of the above, though not in working order.
However, if you need photos or a chance to study the kit, I'm sure we
can help. I know we also have an HP video on about it which covers some
setup and maintenance.
I find that last statement farily hard ot beleive. The HP9880 awas
introduced in 1974, video tape recording, while possible, was not common
then. Are we talking about the same machine?
I'd be only too pleased to repay your kind assistance to us.
Thanks fo the kind offer, but I am not sure it's going to be that much help.
I have most of the units from HP. The 9830 calcualtor and 9866 printer I
know work. The 11305 cotnrolelr and th 2 cable aassemblies are compute
and should be repairable, if they don;t work. I have already repaired one
of the 5V PSU regualtors in the 11305 -- the 723 regualtor IC was
defective. It's a metal can one and I was mildly supriesed that not only
could I stil lget them, I could get an RoHS (lead-free) version, so I
guess they are either still in production of have been discontiuend quite
recently. But anyway.
I have the ROM in an EPROM module. Seeing an original Mass Memory ROM
wouldn't be vey useufl, I know waht the ROM modules look like. You are
not going to weant me to take that apart if you have it, it's held
gotehter by metal studs and dismantling it involves heating them with a
slordering iron to sofent the plastic. In any case, I'll bet it's the
same inside as every otehr HP9830 ROM modulem, 4 HP 512*8 ROM chips and a
potential divider for the Vbb supply. The onl ways to get one of those
are to either get the origianl module, or to put the ROM image into
EPROMs and run them in an EPROM module.
The system tape looks like a tape cassette. Unfortuantely there is no
official way to copy binary program files on an HP9830 -- and of course
this tape is full f them. So again, I have ot work out some way to
read/write such tapes at the bit level, If I can do that, I can either
borrow a system tape from somewhere and back it up, or I can figure out
the tape file format of the HP9800e emoulator and use that data. The
latter doesn't sound like any more work,
I know what the drive looks like, I have one. The manauls are on the
Australian site too. I jsut need to extract the drvie from whichever
corner of my workshop it's hiding in and then see jsut how bad it is.
Soem parts will have to be made. I jsut hope the heads are still OK...
Again, I know what hte PSU looks like and have read the manuals on the
museum site. I am not goign to try to copy that, I am goign to make a
functional equivalent. After all, it's jsut DC power rails.
I will rememebr your kind offer, and if I feel it woudl be useful to see
the origianl parts, I will aks you.
-tony
2:16 p.m.
Tony -
"Fairly hard to believe?" Believe it <grin>!
The tape dates from 1976. It's black and white and was distributed on
U-Matic. While not in the best of condition, I've dubbed it off as an
MPEG 4 for preservation purposes. It may not tell you anything new but
it certainly has novelty value. Oh, and its definitely the same system.
On Mon, 2012-12-10 at 20:04 +0000, Tony Duell wrote:
--
-- Colin
Tony,
I'm pretty sure we have all of the above, though not in working order.
However, if you need photos or a chance to study the kit, I'm sure we
can help. I know we also have an HP video on about it which covers some
setup and maintenance.
I find that last statement farily hard ot beleive. The HP9880 awas
introduced in 1974, video tape recording, while possible, was not common
then. Are we talking about the same machine?
I'd be only too pleased to repay your kind assistance to us.
Thanks fo the kind offer, but I am not sure it's going to be that much help.
I have most of the units from HP. The 9830 calcualtor and 9866 printer I
know work. The 11305 cotnrolelr and th 2 cable aassemblies are compute
and should be repairable, if they don;t work. I have already repaired one
of the 5V PSU regualtors in the 11305 -- the 723 regualtor IC was
defective. It's a metal can one and I was mildly supriesed that not only
could I stil lget them, I could get an RoHS (lead-free) version, so I
guess they are either still in production of have been discontiuend quite
recently. But anyway.
I have the ROM in an EPROM module. Seeing an original Mass Memory ROM
wouldn't be vey useufl, I know waht the ROM modules look like. You are
not going to weant me to take that apart if you have it, it's held
gotehter by metal studs and dismantling it involves heating them with a
slordering iron to sofent the plastic. In any case, I'll bet it's the
same inside as every otehr HP9830 ROM modulem, 4 HP 512*8 ROM chips and a
potential divider for the Vbb supply. The onl ways to get one of those
are to either get the origianl module, or to put the ROM image into
EPROMs and run them in an EPROM module.
The system tape looks like a tape cassette. Unfortuantely there is no
official way to copy binary program files on an HP9830 -- and of course
this tape is full f them. So again, I have ot work out some way to
read/write such tapes at the bit level, If I can do that, I can either
borrow a system tape from somewhere and back it up, or I can figure out
the tape file format of the HP9800e emoulator and use that data. The
latter doesn't sound like any more work,
I know what the drive looks like, I have one. The manauls are on the
Australian site too. I jsut need to extract the drvie from whichever
corner of my workshop it's hiding in and then see jsut how bad it is.
Soem parts will have to be made. I jsut hope the heads are still OK...
Again, I know what hte PSU looks like and have read the manuals on the
museum site. I am not goign to try to copy that, I am goign to make a
functional equivalent. After all, it's jsut DC power rails.
I will rememebr your kind offer, and if I feel it woudl be useful to see
the origianl parts, I will aks you.
-tony
3:34 p.m.
New subject: Ancient Video (Was: Piecing together an HP9880
"Fairly hard to believe?" Believe it
<grin>!
The tape dates from 1976. It's black and white and was distributed on
U-Matic. While not in the best of condition, I've dubbed it off as an
MPEG 4 for preservation purposes. It may not tell you anything new but
it certainly has novelty value. Oh, and its definitely the same system.
B&W reel to reel goes WAYBACK. I first used it in 1968, and that was with
obsolete equipment.
Sony CV series portable systems gave way to Sony AV series by about 1970.
U-Matic (cassette) came out about 1971
Quasar VX? home cassette units came out about 1976
Betamax and VHS came out about 1977.
"First"??!? depends on whether you mean prototypes (about 1971) or retail
"Best" prob'ly Beta, but that isn't what decides what ends up
dominating
the market (cf. 3" V 3.5" diskettes)
How long before DVD and BluRry are gone?
11 Dec
11 Dec
3:08 p.m.
New subject: Ancient Video (Was: Piecing together an HP9880
"Fairly hard to believe?" Believe it
<grin>!
The tape dates from 1976. It's black and white and was distributed on
U-Matic. While not in the best of condition, I've dubbed it off as an
MPEG 4 for preservation purposes. It may not tell you anything new but
it certainly has novelty value. Oh, and its definitely the same system.
B&W reel to reel goes WAYBACK. I first used it in 1968, and that was with
obsolete equipment.
Sony CV series portable systems gave way to Sony AV series by about 1970.
I have a battery-opearated AV series machien and camera. Uses 4" (or s)
spools of tape and runs of a dryfit lead-acid batery. Yo ucan paly back
throughte electronic viewfinder of the camera which is a tiny monochrome
CRT.
There is a nast design bug in thsi unti, though,. The head beam imoutned
on a disk on top of the main motor spidnle. Siad disk is fixed ot the
psinde by a nut. And it's right-ahnd thread. Problem is, it normalyl tuns
in the directio nto _loosen_ the nut. If it coems loose, the head tips
are wrecked by hittine the edges of the slot i nthe starionary head drum.
Please don't ask how I foudn that out. I also discovered that Betamax
head tips can be fitted to the beam and got to work, but it's a right
fiddle to set up.
U-Matic (cassette) came out about 1971
Quasar VX? home cassette units came out about 1976
Philips N1500 around 1972? IIRC that was one of the first home cassete
systems
Betamax and VHS came out about 1977.
"First"??!? depends on whether you mean prototypes (about 1971) or retail
"Best" prob'ly Beta, but that isn't what decides what ends up
dominating
Philisps V2000 a little later. Technically the best of the lot, but it
came out too late. Pity, those machines are wonderfully designed and built.
the market (cf. 3" V 3.5" diskettes)
How long before DVD and BluRry are gone?
The sooner the better :-)
-tony
12 Dec
12 Dec
6:47 a.m.
New subject: Ancient Video (Was: Piecing together an HP9880
How long before DVD and BluRry are gone?
The
sooner the better :-) 
10 Dec
10 Dec
9:12 p.m.
Can you post that video somewhere (YouTube?). I've got a 9831A that I am
trying to refurb and put in our museum. Any information is useful.
On Mon, Dec 10, 2012 at 5:16 PM, Colin Eby <colineby at isallthat.com> wrote:
Tony -
"Fairly hard to believe?" Believe it <grin>!
The tape dates from 1976. It's black and white and was distributed on
U-Matic. While not in the best of condition, I've dubbed it off as an
MPEG 4 for preservation purposes. It may not tell you anything new but
it certainly has novelty value. Oh, and its definitely the same system.
On Mon, 2012-12-10 at 20:04 +0000, Tony Duell wrote:
help.
Tony,
I'm pretty sure we have all of the above, though not in working order.
However, if you need photos or a chance to study the kit, I'm sure we
can help. I know we also have an HP video on about it which covers some
setup and maintenance.
I find that last statement farily hard ot beleive. The HP9880 awas
introduced in 1974, video tape recording, while possible, was not common
then. Are we talking about the same machine?
I'd be only too pleased to repay your kind assistance to us.
Thanks fo the kind offer, but I am not sure it's going to be that much
I have most of the units from HP. The 9830 calcualtor and 9866 printer I
know work. The 11305 cotnrolelr and th 2 cable aassemblies are compute
and should be repairable, if they don;t work. I have already repaired one
of the 5V PSU regualtors in the 11305 -- the 723 regualtor IC was
defective. It's a metal can one and I was mildly supriesed that not only
could I stil lget them, I could get an RoHS (lead-free) version, so I
guess they are either still in production of have been discontiuend quite
recently. But anyway.
I have the ROM in an EPROM module. Seeing an original Mass Memory ROM
wouldn't be vey useufl, I know waht the ROM modules look like. You are
not going to weant me to take that apart if you have it, it's held
gotehter by metal studs and dismantling it involves heating them with a
slordering iron to sofent the plastic. In any case, I'll bet it's the
same inside as every otehr HP9830 ROM modulem, 4 HP 512*8 ROM chips and a
potential divider for the Vbb supply. The onl ways to get one of those
are to either get the origianl module, or to put the ROM image into
EPROMs and run them in an EPROM module.
The system tape looks like a tape cassette. Unfortuantely there is no
official way to copy binary program files on an HP9830 -- and of course
this tape is full f them. So again, I have ot work out some way to
read/write such tapes at the bit level, If I can do that, I can either
borrow a system tape from somewhere and back it up, or I can figure out
the tape file format of the HP9800e emoulator and use that data. The
latter doesn't sound like any more work,
I know what the drive looks like, I have one. The manauls are on the
Australian site too. I jsut need to extract the drvie from whichever
corner of my workshop it's hiding in and then see jsut how bad it is.
Soem parts will have to be made. I jsut hope the heads are still OK...
Again, I know what hte PSU looks like and have read the manuals on the
museum site. I am not goign to try to copy that, I am goign to make a
functional equivalent. After all, it's jsut DC power rails.
I will rememebr your kind offer, and if I feel it woudl be useful to see
the origianl parts, I will aks you.
-tony
--
-- Colin
11 Dec
11 Dec
3:13 p.m.
Can you post that video somewhere (YouTube?). I've got a 9831A that I am
trying to refurb and put in our museum. Any information is useful.
The HP9830 and HP9831 are very different machines, the only thing in
common being that they run BASIC. AFAIK there neger was a version of the
9880 for the 9831 system, although I think you could use an 8" floppy
drive with it (HP9885?) . Good luck in findign the system ROM, though.
The HP9831 is, of couree, an HP9825 with different ROMs and a few
differnet keycaps. The schematis for the 9825 are applicable to the 9831
too. If you need any help getting it going, let me know, I have worked on
the 9825 and 9831.
-tony
2:45 p.m.
Tony -
"Fairly hard to believe?" Believe it <grin>!
I said 'hard', not 'impossible' :-)
The tape dates from 1976. It's black and white and was distributed on
U-Matic. While not in the best of condition, I've dubbed it off as an
MPEG 4 for preservation purposes. It may not tell you anything new but
Pity. Umatic I have a chance of being able to view (I have a compact
Unmatic portable machine here, I would seriously consider getting a full
onw). Digital files, not a hope.
it certainly has novelty value. Oh, and its
definitely the same system.
What is covered in this 'film'?
-tony
10 Dec
10 Dec
7:54 a.m.
-----Oorspronkelijk bericht-----
Van: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org]
Namens Tony Duell
Verzonden: zondag 9 december 2012 22:23
Aan: cctalk at classiccmp.org
Onderwerp: Piecing together an HP9880
I am not sure if this is on-topic since the machine involved was sold as a
calculaotr. On the other hand, it programs in BASIC, it's getting on for
40
yuears
old, and I am thinking of adding a hard disk. Classic
computer?
The HP9880 is the hard disk (14" platters) for the HP9830 'calculator'. I
am slowly
gathering the various bits of this system, I would
love to get it all
working again.
As I understnad it, you need :
An HP9830 calculator,
HP9866 printer
Mass Memory ROM module
HP11273B 'cable' from the HP9830 to the controller
HP11305 disk controller
HP11302 cable from the controlelr to the drive
HP7900A disk drive (one fixed, oen removeable plater) + PSU (or HP7901,
which
has only the removeable platter, but has an internal
PSU)
System tape cassette for the HP9830
Disk packs (of course).
Now, The 9830 and 9866 I have, working. The HP11305 controller and both
'cables' (I put that in quotes becase thes cable assembleis have PSBs
stuffed with
ICs at at elast one end -- the 11273 has over 50 ICs
in it) I also have,
untested,
but I know th PSU is good and the microcde ROMs look
OPK (the disassebmyl
of
the mcirocode makes sense). Since everything else is
standard TTL,
analogue or
RAMs ICs, I think that's reparaiable if necessary.
I have the scheamtics
and
micorocde source for all that.
The HP9800e emulator includes a dumo of the Mass Memory ROM, and thus I
have it in an EPROM module.
That emualtor also has an image of the ssytem and service tapes for the
9880,
but as yet I haven'tt figured out the format of
the image file or how to
get them
back onto physicl cassettes. I do have another tape
drive mechansim (not
HP)
which sould be able to produce compatible tapes
'Just'
a little matter of figuring out how ot interface it to soemthign and use
it. At
least
I ahve the handbook for said drive, it includes
timeing diagrams and
schematics.
Which leaves the drive and packs. This is the problem, I susepct I do
havev a
7900A. Alas it was in a skip (dumpster) and had a
2100A thrown on top of
it. The
2100A survived. THe 7900A is more sdubious. The front
was samaged when it
was gtaken out of the rack too. It's missing the terminator and the little
card
edge conenctor PCB, but those are easy to make I
think.
It's going ot need work. I also don't have the PSU for it. This seems ot
be
120C
AC (not isolated from the mains) for the blower and
spindle motros),
unregualted +/-24V and regulated +5V, +/-12V. Nothing difficult, but I can
see
myself speding time and moeny making something and
then find the heads
will
no logner fly. I susepct replacement heads are not
exactly common, I
wonder if
RK05 heads can me made ot fit?
According to the HP nanual for the drive, there was a text/service unti
for this
drive, it conencted ot the side of the backplane. I
cna't rememebr the
model
numebr (HP13219?). Hase anyone ever seen one, or have
the manuals for it?
And now for the pack. It's the same physicla size as the RK05 pack, but
24 (hard) sectors. Of coruse there's the fixed platter in the 7900A drive
with
it's
own 24 sector hard dsetoy rign nad transducer. I
belived the drive will
spin up
with any pack in it, so I could put a
'scratch' 12 sector RK05 in there to
(a) see if
the heads will fly and (b) see if I can use the fixed
paltter (which will
be 24 sector)
drom the HP9830.
If I get that far, I guess I then take an RK05 pack apart and attempt to
put
anotehr 12 notches i nthe sector ring. I beleive I
then have to re-centre
the
platter on the hub which will be
'interesting'
What if the heads crash? Maybe try to fit RK05 heads (I have some brand
new
spares here). Maybe try to interface an RK03 or RK05
to the HP contorller.
The
interface is differnet, but at least the data rate is
the same. It woudl
take a bit of
logic to get it to work, but... If all else fails,
make a solid-state
repalcement for
the drive?
I gueess the questions at the momnet are :
Anyone know the precise details of the tape image file format for 9800e?
Anyone ever manage to fit RK05 heads into an HP7900?
Anyone ever managed to cut the ectra sector notches?
Anything knwon about the disk service unit for the HP7900?
Does anyone have any comments/thoughts. Am I totally crazy for trying to
do
this?
-tony
If you want it I do have a copy of the system tape.
I also have the mass memory rom .
Let me know if they are of any use for you.
-Rik
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ard＠p850ug1.demon.co.uk -
bfranchuk＠jetnet.ab.ca -
cisin＠xenosoft.com -
colineby＠isallthat.com -
hp-fix＠xs4all.nl -
pu1bzz.listas＠gmail.com -
tony.aiuto＠gmail.com