http://www.techrepublic.com/photos/sinclair-zx81-teardown/6196127?tag=nl.e101
Cheers,
Norman.
--
Norman Dunbar
Dunbar IT Consultants Ltd
Registered address:
Thorpe House
61 Richardshaw Lane
Pudsey
West Yorkshire
United Kingdom
LS28 7EL
Company Number: 05132767
I liked the following comment by one observer and couldn't put it better myself
Those were great times before the internet and IBM-compatibles distracted us
from real computing.
One of Dave's survey questions asked about the internet and although it is a
useful resource, I have lost many an
Davide Santachiara wrote, on 23/Feb/11 06:47 | Feb23:
-Messaggio originale-
Da: ql-users-boun...@lists.q-v-d.com
[mailto:ql-users-boun...@lists.q-v-d.com] Per conto di Francois Lanciault
Inviato: mercoledì 23 febbraio 2011 3.33
A: ql-us...@q-v-d.com
Oggetto: [Ql-Users] Dead QL
Hi QL
Lee Privett wrote, on 23/Feb/11 08:46 | Feb23:
I liked the following comment by one observer and couldn't put it better myself
Those were great times before the internet and IBM-compatibles distracted us from
real computing.
One of Dave's survey questions asked about the internet and
Maybe I wanted to remain ignorant :-)
Lee
- Back to the QL-
- Original Message -
From: Tony Firshman
To: ql-us...@q-v-d.com
Sent: Wednesday, February 23, 2011 9:20 AM
Subject: Re: [Ql-Users] 57 images of dismantling a Sinclair ZX-81.
Lee Privett wrote, on 23/Feb/11
So, in order to allow users to RESPR additional extensions after loading the
Ser-USB driver, I changed the mechanism for the way in which it starts its
Queue Manager task. It was quite elegant, really: setting a flag bit the
first time that Queue Manager services were needed to be picked up later
On 23 Feb 2011, at 11:27, Adrian Ives wrote:
Now I have probably missed some important piece of documentation somewhere
that says you're not allowed to do trap 1, mt.cjob in a scheduler loop task
under QDOS, but you are allowed to in SMSQ. The QDOS documentation that I
have doesn't say
On 23 Feb 2011, at 11:45, Rich Mellor wrote:
The difference in MOD and DIV is mentioned in the SBASIC/SuperBASIC Reference
Manual (plug)
-
And where exactly can you get hold of this Manual? (Attempting to unplug to let
it flow). It seems a must.
George
On 23/02/2011 11:52, gdgqler wrote:
On 23 Feb 2011, at 11:45, Rich Mellor wrote:
The difference in MOD and DIV is mentioned in the SBASIC/SuperBASIC Reference
Manual (plug)
-
And where exactly can you get hold of this Manual? (Attempting to unplug to let
it flow). It seems a must.
George
Oh dear you fell for Rich's QDOS trap 2, caugt mt.cm job look @ RWap Site loop
Lee
- Back to the QL-
- Original Message -
From: gdgqler
To: ql-us...@q-v-d.com
Sent: Wednesday, February 23, 2011 11:52 AM
Subject: Re: [Ql-Users] Ranting: A Story of two Operating Systems
On 23/02/2011 11:45, Rich Mellor wrote:
On 23/02/2011 11:36, gdgqler wrote:
On 23 Feb 2011, at 11:27, Adrian Ives wrote:
Now I have probably missed some important piece of documentation
somewhere
that says you're not allowed to do trap 1, mt.cjob in a scheduler
loop task
under QDOS, but
Adrian Ives wrote:
But what I would really like is some kind of document that sets out a list
of things that fall in the category: This should work under QDOS, it says
it should, but it doesn't
but we went ahead and fixed it in SMSQ
Where does it say it should work under QDOS? I guess this
Hmm, indeed.
Malcolm
On 23/02/2011 12:12, Lee Privett wrote:
Oh dear you fell for Rich's QDOS trap 2, caugt mt.cm job look @ RWap Site loop
Lee
- Back to the QL-
- Original Message -
From: gdgqler
To: ql-us...@q-v-d.com
Sent: Wednesday, February 23, 2011 11:52 AM
Marcel Kilgus wrote, on 23/Feb/11 12:21 | Feb23:
Adrian Ives wrote:
But what I would really like is some kind of document that sets out a list
of things that fall in the category: This should work under QDOS, it says
it should, but it doesn't … but we went ahead and fixed it in SMSQ
Where
This is a test to see if it works.
Klaus
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Tony Firshman wrote, on 23/Feb/11 09:20 | Feb23:
Lee Privett wrote, on 23/Feb/11 08:46 | Feb23:
I liked the following comment by one observer and couldn't put it
better myself Those were great times before the internet and
IBM-compatibles distracted us from real computing.
One of Dave's
Returned home from across the pond earlier this week (a little late
due to emergency detour of the plane 1/3 the way across the atlantic
to Bermuda due to illness of a person on board) to find over 500
QL-users emails while I was away.
Guess this will keep me out of mischief for a while
Page 34 of the QL Technical Guide; 6.3.3 Scheduler Loop Tasks states that:
Calls from the scheduler loop do not interrupt atomic tasks. This means
that operations such as allocating or releasing memory can be performed
safely.
Now admittedly it doesn't say This means that operations such as
On 23 Feb 2011, at 13:51, Tony Firshman wrote:
where ignorance is bliss,
'Tis folly to be wise.
You should have wasted some prime internet time Googling for that (8-)#
Did anyone on the list actually go to Eton then?
At one of the schools I went to I met another pupil, a violinist, who
gdgqler wrote, on 23/Feb/11 15:20 | Feb23:
On 23 Feb 2011, at 13:51, Tony Firshman wrote:
where ignorance is bliss,
'Tis folly to be wise.
You should have wasted some prime internet time Googling for that (8-)#
Did anyone on the list actually go to Eton then?
At one of the schools I went
On 23 Feb 2011, at 16:14, Tony Firshman wrote:
Where was that - Harrow (8-)#
Sedbergh, actually.
George
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I have a Trump card with a note to say that it progressively lost
memory. I haven't done anything with it because I replaced it with a
SGC. (all this some years ago). Is this a simple fault? Any
suggestions what might be wrong, and advice to perhaps correct,
please.
Bryan
Tony Firshman wrote, on 13/Feb/11 14:24 | Feb13:
I see Qemulator has moved form geocities.
What link should I use for it?
Found it on Dilwyn's site (ironically hosted by *my* server).
http://terdina.net/ql/q-emulator.html
Thanks Dilwyn. Did you realise your brother has now beaten you in
At 16:16 23/02/2011 +, you wrote:
Where was that - Harrow (8-)#
Sedbergh, actually.
My brother-in-law went there, a rugged institution I believe. Sarten.
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At 17:57 23/02/2011 +, you wrote:
My brother-in-law went there, a rugged institution I believe. Sarten.
Sparten, sorry
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On Wed, Feb 23, 2011 at 6:33 AM, Tony Firshman t...@firshman.co.uk wrote:
The one that rescued a vast number of QLs I repaired was his ram check and
error display. The ram check is writing rom images into ram, and reading
back. He seeded this. Why? Well if a zero is written to a dead ram
On 23 Feb 2011, at 17:57, David Tubbs wrote:
Where was that - Harrow (8-)#
Sedbergh, actually.
My brother-in-law went there, a rugged institution I believe. Sarten.
A cold breezy place. We used to have to run up a hill called Winder when the
weather was too bad for ruggered games.
On Wed, Feb 23, 2011 at 11:33 AM, Dilwyn Jones dil...@evans1511.fsnet.co.uk
wrote:
Dilwyn Jones (the one in Bethesda)
Bethesda, Maryland? Have you been defense contracting again?!?! Bad boy!
If my name was Dilwyn, I'd visit foreign countries and pretend to be mute.
I'd simply pass a calling
Pressing priorities like getting my current real QL(s) up to a standard that
substantially exceeded my 84/85 version (which was a handmade internally
expanded to 640K machine and that was it) so that I can get the remainder of
the microdrive data off the microdrives on to floppies, use the QL
see there is another thing, if only I had JS ROMs :(
Lee
- Back to the QL-
- Original Message -
From: Dave Park
To: ql-us...@q-v-d.com
Sent: Wednesday, February 23, 2011 6:57 PM
Subject: Re: [Ql-Users] 57 images of dismantling a Sinclair ZX-81.
On Wed, Feb 23, 2011 at
Dilwyn Jones (the one in Bethesda)
Bethesda, Maryland? Have you been defense contracting again?!?! Bad
boy!
If my name was Dilwyn, I'd visit foreign countries and pretend to be
mute.
I'd simply pass a calling card with Dilwyn printed on it, then
watch them
slaughter my name. I haven't
While ploughing through the 500-odd emails from this list today, I
noticed one by Jimmy Montesinos about QL2K. I can't find the original
email now, so I'll start a new thread.
If Jimmy is listening, please can I have (1) floppy disk FLP driver
access and 2) QXL.WIN access
(that should keep
I have been talking to Tony (Lau is AWOL) about Minerva 2. I would
really
like to do a Minerva ROM board that allows you to choose to boot
either
Minerva 1.98 or JS ROMs, since it's always handy to have both. If I
can get
permission and licenses, I'll be doing that. If SMSQ/E fit in
64KBytes
On Wed, Feb 23, 2011 at 1:11 PM, Lee Privett lee.priv...@gmail.com wrote:
see there is another thing, if only I had JS ROMs :(
The card I'm proposing could hold a 128KByte or 256KByte PROM. By manually
switching one (128K) or two (256K) Address lines, I can manipulate any 64K
block of the PROM
On 23/02/2011 19:49, Dilwyn Jones wrote:
While ploughing through the 500-odd emails from this list today, I
noticed one by Jimmy Montesinos about QL2K. I can't find the original
email now, so I'll start a new thread.
If Jimmy is listening, please can I have (1) floppy disk FLP driver
access
Bethesda, Maryland? Have you been defense contracting again?!?! Bad
boy!
If my name was Dilwyn, I'd visit foreign countries and pretend to be
mute.
I'd simply pass a calling card with Dilwyn printed on it, then
watch them
slaughter my name. I haven't decided if that would be masochism or
That sounds great Dave, so what help do you need from me (that I can do)?
Lee
- Back to the QL-
- Original Message -
From: Dave Park
To: ql-us...@q-v-d.com
Sent: Wednesday, February 23, 2011 8:07 PM
Subject: Re: [Ql-Users] 57 images of dismantling a Sinclair ZX-81.
On
It also had me going for a while looking at the ICE MICE screens seeing 'by D
Jones' only to find later the name of the author was David in the documentation
anyway.
Lee
- Back to the QL-
- Original Message -
From: Dilwyn Jones
To: ql-us...@q-v-d.com
Sent: Wednesday,
On 23/02/2011 19:49, Dilwyn Jones wrote:
While ploughing through the 500-odd emails from this list today, I
noticed one by Jimmy Montesinos about QL2K. I can't find the original
email now, so I'll start a new thread.
If Jimmy is listening, please can I have (1) floppy disk FLP driver
access and
Dilwyn, this is quite funny, its like we are having a final summary of the last
two weeks
Lee
- Back to the QL-
- Original Message -
From: Dilwyn Jones
To: ql-us...@q-v-d.com
Sent: Wednesday, February 23, 2011 8:16 PM
Subject: Re: [Ql-Users] The Spring 2011 QL Survery
Thanks for the offer to help with rewriting the constitution - we
have the beginnings of a potential constitution redrafting team,
Best wishes,
Geoff
For members, there will be an open forum to discuss the Quanta
constitution on the sunday morning of the Workshop/AGM in April
(16th/17th)
Dave Park wrote:
I just need to check out the chip select lines on the two ROM sockets to see
how they operate - someone has said that in the $8000 socket, CS asserts for
the entire 32K block, but to me that suggests a conflict with the ROM port.
I'll want to check it out, unless someone can
Phill Harvey-Smith wrote:
The next release of MESS should have Trump Card emulation built in,
and maybe also Sandy SuperDisk if I can work out how it addresses
the 1770
Feel free to ask if you want details of the remapping gymnastics
that the TC performs so that the ram test detects all
- Original Message -
From: Lee Privett lee.priv...@gmail.com
To: ql-us...@q-v-d.com
Sent: Wednesday, February 23, 2011 8:34 PM
Subject: Re: [Ql-Users] The Spring 2011 QL Survery
Dilwyn, this is quite funny, its like we are having a final summary
of the last two weeks
Lee
Oops,
At 21:47 23/02/2011 +0100, you wrote:
All this trickery finally explains to me why my innocent try to just
put a 27256 and a 27128 as replacement in 10 years ago were bound to
fail...
Marcel,
Pity I cant show my implemtation, two 27512's with a buffer chip to invert
the enables.
Don't lurk, its been quite entertaining, more please :)
Lee
- Back to the QL-
- Original Oops, sorry, just catching up. I'll go away and lurk now...
Dilwyn Jones
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On 23/02/2011 17:16, Bryan Horstmann wrote:
I have a Trump card with a note to say that it progressively lost
memory. I haven't done anything with it because I replaced it with a
SGC. (all this some years ago). Is this a simple fault? Any
suggestions what might be wrong, and advice to perhaps
In message 4d643c95.2040...@firshman.co.uk, Tony Firshman
t...@firshman.co.uk writes
Malcolm Cadman wrote, on 21/Feb/11 21:34 | Feb21:
Hi Dave,
Is it an Mplane that was used in the AT cased version of a QL?
Any backplane is possible.
At the London QL Group we are repairing an AT QL
If it helps any, the 1770 controller can be replaced with a 1772...
Dave
On Wed, Feb 23, 2011 at 2:22 PM, Phill Harvey-Smith
a...@aurigae.demon.co.uk wrote:
On 23/02/2011 19:49, Dilwyn Jones wrote:
While ploughing through the 500-odd emails from this list today, I
noticed one by Jimmy
On Wed, Feb 23, 2011 at 1:04 PM, Marcel Kilgus ql-us...@mail.kilgus.netwrote:
Dave Park wrote:
I have been talking to Tony (Lau is AWOL) about Minerva 2. I would really
like to do a Minerva ROM board that allows you to choose to boot either
Minerva 1.98 or JS ROMs, since it's always handy
Here are some screenshots, taken off the image of an LCD monitor connected
to an Aurora/SGC/superHermes QL:
http://img202.imageshack.us/g/serusbtesting012.jpg/
There will be more pictures of the Ser-USB prototype in the forthcoming QL
Today article.
If the screen layout is not the
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