29 Dec
2011
29 Dec
'11
3:34 p.m.
found a mint looking osborne 1 today local computer recyler they had not
even looked at it yet so i managed to get it for decent price got it home
opened it up found some cpm disks nice little bonus and a mint looking
interior
http://img268.imageshack.us/img268/4927/osborn.jpg
i tried firing it up and it powers up for fraction of a second when it trys
to do its power on beep and dies.
http://youtu.be/WXzI-FIr50w << see here what its doing (my ipod tuch sure
is usefull)
i'm guesing its the power supply but want to make sure befor i tare it
apart. i've got another one that does weird things that also needs
servicing but one of the face plate screws is striped so unable to get it
open to look..
29 Dec
29 Dec
4:01 p.m.
On 29 Dec 2011 at 17:34, Adrian Stoness wrote:
i'm guesing its the power supply but want to make
sure befor i tare it
apart. i've got another one that does weird things that also needs
servicing but one of the face plate screws is striped so unable to get
it open to look..
Probably a power supply issue. I'd start with the electrolytics--
given the age of the machine, they're probably candidates anyway.
--Chuck
4:10 p.m.
turns out it does power up i just didn't wait long enough though i've come
to a new issue.
when i hit return once i put the floppy in the drive it does not try to
read the disk
On Thu, Dec 29, 2011 at 6:01 PM, Chuck Guzis <cclist at sydex.com> wrote:
On 29 Dec 2011 at 17:34, Adrian Stoness wrote:
i'm guesing its the power supply but want to
make sure befor i tare it
apart. i've got another one that does weird things that also needs
servicing but one of the face plate screws is striped so unable to get
it open to look..
Probably a power supply issue. I'd start with the electrolytics--
given the age of the machine, they're probably candidates anyway.
--Chuck
4:23 p.m.
On Dec 30, 2011 12:13 AM, "Adrian Stoness" <tdk.knight at gmail.com>
wrote:
turns out it does power up i just didn't wait long enough though i've come
to a new issue.
when i hit return once i put the floppy in the drive it does not try to
read the disk
The firmware in a CP/M machine I'd much simpler then you are probably used
to, but I would think you'd want to get a boot disk in there as soon as you
can after it's turned on. It may not boot up after it's tried & couldn't
find one.
- LP
4:42 p.m.
On Thu, Dec 29, 2011 at 6:23 PM, Liam Proven <lproven at gmail.com> wrote:
On Dec 30, 2011 12:13 AM, "Adrian Stoness"
<tdk.knight at gmail.com> wrote:
it does not even try to turn the floppy drive on so i duno
turns out it does power up i just didn't wait long enough though i've
come
to a new issue.
when i hit return once i put the floppy in the drive it does not try to
read the disk
The firmware in a CP/M machine I'd much simpler then you are probably used
to, but I would think you'd want to get a boot disk in there as soon as you
can after it's turned on. It may not boot up after it's tried & couldn't
find one.
- LP
5:58 p.m.
Yes, my guess would be a PSU issue too.
They are a bit of a pain to disassemble but the PSU is a self contained unit
and relatively easy to work on.
Tez
----- Original Message -----
From: "Adrian Stoness" <tdk.knight at gmail.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Sent: Friday, December 30, 2011 1:42 PM
Subject: Re: osborne 1
On Thu, Dec 29, 2011 at 6:23 PM, Liam Proven
<lproven at gmail.com> wrote:
On Dec 30, 2011 12:13 AM, "Adrian
Stoness" <tdk.knight at gmail.com> wrote:
it does not even try to turn the floppy drive on so i duno
turns out it does power up i just didn't wait long enough though i've
come
to a new issue.
when i hit return once i put the floppy in the drive it does not try to
read the disk
The firmware in a CP/M machine I'd much simpler then you are probably
used
to, but I would think you'd want to get a boot disk in there as soon as
you
can after it's turned on. It may not boot up after it's tried & couldn't
find one.
- LP
6:13 p.m.
whats the best way to take the 2 brightnes dials off their pins?
On Thu, Dec 29, 2011 at 7:58 PM, terry stewart <terry at webweavers.co.nz>wrote:
Yes, my guess would be a PSU issue too.
They are a bit of a pain to disassemble but the PSU is a self contained
unit and relatively easy to work on.
Tez
----- Original Message ----- From: "Adrian Stoness" <tdk.knight at
gmail.com>
To: "General Discussion: On-Topic and Off-Topic Posts" <
cctalk at classiccmp.org>
Sent: Friday, December 30, 2011 1:42 PM
Subject: Re: osborne 1
On Thu, Dec 29, 2011 at 6:23 PM, Liam Proven <lproven at gmail.com> wrote:
On Dec 30, 2011 12:13 AM, "Adrian Stoness" <tdk.knight at gmail.com>
wrote:
it does not even try to turn the floppy drive on so i duno
turns out it does power up i just didn't wait long enough though i've
come
to a new issue.
when i hit return once i put the floppy in the drive it does not try to
read the disk
The firmware in a CP/M machine I'd much simpler then you are probably
used
to, but I would think you'd want to get a boot disk in there as soon as
you
can after it's turned on. It may not boot up after it's tried & couldn't
find one.
- LP
6:31 p.m.
Just a steady hard consistant pull. Don't jerk them off but try to get your
fingers round the back of them and ease them off. It's just friction
holding them on.
Sometimes it's a hell of a lot of friction though.
You've found a manual for disassembly, yes? They are a little complicated
to take apart. In particular it's easy to forget which way up things went
and where they were plugged in. Take photos as you go.
Tez
----- Original Message -----
From: "Adrian Stoness" <tdk.knight at gmail.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Sent: Friday, December 30, 2011 3:13 PM
Subject: Re: osborne 1
whats the best way to take the 2 brightnes dials off
their pins?
On Thu, Dec 29, 2011 at 7:58 PM, terry stewart
<terry at webweavers.co.nz>wrote:
Yes, my guess would be a PSU issue too.
They are a bit of a pain to disassemble but the PSU is a self contained
unit and relatively easy to work on.
Tez
----- Original Message ----- From: "Adrian Stoness"
<tdk.knight at gmail.com>
To: "General Discussion: On-Topic and Off-Topic Posts" <
cctalk at classiccmp.org>
Sent: Friday, December 30, 2011 1:42 PM
Subject: Re: osborne 1
On Thu, Dec 29, 2011 at 6:23 PM, Liam Proven <lproven at gmail.com> wrote:
On Dec 30, 2011 12:13 AM, "Adrian Stoness" <tdk.knight at gmail.com>
wrote:
>
> turns out it does power up i just didn't wait long enough though i've
come
> to a new issue.
>
> when i hit return once i put the floppy in the drive it does not try
> to
> read the disk
The firmware in a CP/M machine I'd much simpler then you are probably
used
to, but I would think you'd want to get a boot disk in there as soon as
you
can after it's turned on. It may not boot up after it's tried &
couldn't
find one.
- LP
it does not even try to turn the floppy drive on so i duno
6:50 p.m.
txs got the covers off
http://youtu.be/NrIe7iyvtjc
On Thu, Dec 29, 2011 at 8:31 PM, terry stewart <terry at webweavers.co.nz>wrote:
Just a steady hard consistant pull. Don't jerk
them off but try to get
your fingers round the back of them and ease them off. It's just friction
holding them on.
Sometimes it's a hell of a lot of friction though.
You've found a manual for disassembly, yes? They are a little complicated
to take apart. In particular it's easy to forget which way up things went
and where they were plugged in. Take photos as you go.
Tez
----- Original Message ----- From: "Adrian Stoness" <tdk.knight at
gmail.com>
To: "General Discussion: On-Topic and Off-Topic Posts" <
cctalk at classiccmp.org>
Sent: Friday, December 30, 2011 3:13 PM
Subject: Re: osborne 1
whats the best way to take the 2 brightnes dials off their pins?
On Thu, Dec 29, 2011 at 7:58 PM, terry stewart <terry at webweavers.co.nz
wrote:
Yes, my guess would be a PSU issue too.
They are a bit of a pain to disassemble but the PSU is a self contained
unit and relatively easy to work on.
Tez
----- Original Message ----- From: "Adrian Stoness" <
tdk.knight at gmail.com>
To: "General Discussion: On-Topic and Off-Topic Posts" <
cctalk at classiccmp.org>
Sent: Friday, December 30, 2011 1:42 PM
Subject: Re: osborne 1
On Thu, Dec 29, 2011 at 6:23 PM, Liam Proven <lproven at gmail.com> wrote:
On Dec 30, 2011 12:13 AM, "Adrian Stoness" <tdk.knight at gmail.com>
wrote:
> >
> > turns out it does power up i just didn't wait long enough though i've
> come
> > to a new issue.
> >
> > when i hit return once i put the floppy in the drive it does not try
> > to
> > read the disk
>
> The firmware in a CP/M machine I'd much simpler then you are probably
> used
> to, but I would think you'd want to get a boot disk in there as soon as
> you
> can after it's turned on. It may not boot up after it's tried &
> couldn't
> find one.
>
> - LP
>
>
> it does not even try to turn the floppy drive on so i duno
7:56 p.m.
On 30/12/11 02:50, Adrian Stoness wrote:
txs got the covers off
http://youtu.be/NrIe7iyvtjc
I'd be looking at --
- Power supply
- Keyboard
- Cabling (remove and reseat connectors)
- Disc controller
--
Phil.
classiccmp at philpem.me.uk
http://www.philpem.me.uk/
10:18 p.m.
youtube video shows "inserf floppy and hit enter" message on video, so
would it no be possibly a floppy problem, or maybe the keyboard isn't
getting the "enter" through?
The original video had a lot of clicking noises, which I didn't place
the source of. If the floppies spin / actuate that would be a clue.
The floppy drives quite often spin when you insert a disk so if that is
happening you'd know the motor voltage on the floppy drive is working.
I don't know if there are head load solenoids for 5 1/4" drives anymore,
so that may not be a clue.
Jim
On 12/29/2011 7:56 PM, Philip Pemberton wrote:
On 30/12/11 02:50, Adrian Stoness wrote:
txs got the covers off
http://youtu.be/NrIe7iyvtjc
I'd be looking at --
- Power supply
- Keyboard
- Cabling (remove and reseat connectors)
- Disc controller
11 p.m.
the noise u hear
first one
is me turning it on
the rest are the keyboard
On Fri, Dec 30, 2011 at 12:18 AM, jim s <jws at jwsss.com> wrote:
youtube video shows "inserf floppy and hit
enter" message on video, so
would it no be possibly a floppy problem, or maybe the keyboard isn't
getting the "enter" through?
The original video had a lot of clicking noises, which I didn't place the
source of. If the floppies spin / actuate that would be a clue.
The floppy drives quite often spin when you insert a disk so if that is
happening you'd know the motor voltage on the floppy drive is working.
I don't know if there are head load solenoids for 5 1/4" drives anymore,
so that may not be a clue.
Jim
On 12/29/2011 7:56 PM, Philip Pemberton wrote:
> On 30/12/11 02:50, Adrian Stoness wrote:
>
>> txs got the covers off
>>
>> http://youtu.be/NrIe7iyvtjc
>>
> I'd be looking at --
>
> - Power supply
> - Keyboard
> - Cabling (remove and reseat connectors)
> - Disc controller
>
>
11:24 p.m.
Yes, could well be a keyboard issue.
Tez
----- Original Message -----
From: "jim s" <jws at jwsss.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Sent: Friday, December 30, 2011 7:18 PM
Subject: Re: osborne 1
youtube video shows "inserf floppy and hit
enter" message on video, so
would it no be possibly a floppy problem, or maybe the keyboard isn't
getting the "enter" through?
The original video had a lot of clicking noises, which I didn't place the
source of. If the floppies spin / actuate that would be a clue.
The floppy drives quite often spin when you insert a disk so if that is
happening you'd know the motor voltage on the floppy drive is working.
I don't know if there are head load solenoids for 5 1/4" drives anymore,
so that may not be a clue.
Jim
On 12/29/2011 7:56 PM, Philip Pemberton wrote:
On 30/12/11 02:50, Adrian Stoness wrote:
-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2012.0.1901 / Virus Database: 2109/4711 - Release Date: 12/29/11
txs got the covers off
http://youtu.be/NrIe7iyvtjc
I'd be looking at --
- Power supply
- Keyboard
- Cabling (remove and reseat connectors)
- Disc controller
30 Dec
30 Dec
12:25 p.m.
turns out it does power up i just didn't wait long enough though i've come
to a new issue.
when i hit return once i put the floppy in the drive it does not try to
read the disk
Now I don;t know this machine at all, but do I conclude from that that
you are getting soemthing useful on the screen amd that therefore the
processor/video is working?
I think I would start at the floppy drive interface connector, simply
becuase it's a standar, known, plinout. You want to see if the the
machine is trying to start the floppy drive motor (look at the drive
select and motor on signals with a logic probe). I'd also check the power
supply rails. I suspect the 12V rail, needed for the drive motors, is
also used by the video monitor, but it's not unheard-of for the latter to
be a separate supply. A voltmeter on the drive power connector will tell
you for sure.
Could it be the keyboard? You mention pressign the return key. Do you
know if this is actually doing anything? Could it be keyswitch problems?
-tony
3:59 p.m.
no idea i need to pull my spare keyboard outa storeage though this project
is about to get put aside for next 18days as i will be taking off to work
earlyer then expected txs for the suggestions
On Fri, Dec 30, 2011 at 2:25 PM, Tony Duell <ard at p850ug1.demon.co.uk> wrote:
turns out it does power up i just didn't wait long enough though i've
come
to a new issue.
when i hit return once i put the floppy in the drive it does not try to
read the disk
Now I don;t know this machine at all, but do I conclude from that that
you are getting soemthing useful on the screen amd that therefore the
processor/video is working?
I think I would start at the floppy drive interface connector, simply
becuase it's a standar, known, plinout. You want to see if the the
machine is trying to start the floppy drive motor (look at the drive
select and motor on signals with a logic probe). I'd also check the power
supply rails. I suspect the 12V rail, needed for the drive motors, is
also used by the video monitor, but it's not unheard-of for the latter to
be a separate supply. A voltmeter on the drive power connector will tell
you for sure.
Could it be the keyboard? You mention pressign the return key. Do you
know if this is actually doing anything? Could it be keyswitch problems?
-tony
11 Jan
11 Jan
12:04 a.m.
ok so i am back in winnipeg now
swaped the keyboard and responds to hitting enter
but...
http://youtu.be/bRd_ARLwaaY
30 Dec
30 Dec
12:21 p.m.
found a mint looking osborne 1 today local computer recyler they had not
even looked at it yet so i managed to get it for decent price got it home
opened it up found some cpm disks nice little bonus and a mint looking
interior
http://img268.imageshack.us/img268/4927/osborn.jpg
i tried firing it up and it powers up for fraction of a second when it trys
to do its power on beep and dies.
http://youtu.be/WXzI-FIr50w << see here what its doing (my ipod tuch sure
is usefull)
i'm guesing its the power supply but want to make sure befor i tare it
apart. i've got another one that does weird things that also needs
The only way to know if the PSU it OK is to cvheck the output voltages.
You may find soem of them on external connectors (for exxample the
keyboard connector), but it's often easier to take the machine apart and
chack at the PSU connectors.
Personally, I would never power up an unkopwn machine without taking it
apart and doing a visaul inspaction of the insides followed by chekcign
the PSU on dummy load But anyway...
servicing but one of the face plate screws is striped
so unable to get it
open to look..
That's what drills are for :-)
-tony
4501
days inactive
4514
days old
16 comments
7 participants
participants (7)
-
ard＠p850ug1.demon.co.uk -
cclist＠sydex.com -
classiccmp＠philpem.me.uk -
jws＠jwsss.com -
lproven＠gmail.com -
tdk.knight＠gmail.com -
terry＠webweavers.co.nz