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Are these real multisync monitors ?

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Xavier

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Aug 6, 2010, 5:33:31 AM8/6/10
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Hello.

Do you know if these monitors (CRT) :
- NEC Multisync FE770
- NEC Multisync A700
are real multisync monitors ? (ie allowing to display VGA screen
modes, but also low res modes as a mere RGB monitor (or TV) would do :
full screen at 50 Hz, and not 'letter box' VGA style at higher
frequencies).
Thank you.

In fact I'm looking for a list of CRT monitors which are real
multisync, to buy a few of them on Ebay.
Thanks for your help.

Xavier.

Xavier

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Aug 6, 2010, 5:52:27 AM8/6/10
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I've found this list on the Net.
If any one you has one of the following, could he/she confirm these

are real multisync monitors ?
Thank you.

Size Make Model MaxRes HScan DP VRef
42 Mitsubishi AM-4201R 1280x1024
15.7-64 Khz 1.1 45-120 Hz
42 Mitsubishi MegaView Pro 42 (AM-4201R) 1280x1024 60 Hz 15.75;
20-64 Khz .96 45-120 Hz
37 Mitsubishi MegaView 37 (XC-3716C) 1280x1024 75 Hz
15-39.5 Khz .85 40-120 Hz
37 Mitsubishi MegaView 37 Plus (XC3717C) 1024x768 75Hz 15-61
Khz .85 40-120 Hz
37 Mitsubishi MegaView Pro 37 (XC-725C) 1280x1024 75 Hz 15.75;
24-64 Khz .85 40-120 Hz
37 Mitsubishi Diamond Scan 37 800x600 15-36
Khz 1.1 40-120 Hz
37 NEC MultiSync XP37 (XP3778A) 1280x1024 1524-78
Khz .85 40-120 Hz
37 NEC Multisync XM37 (XM3750A) 1024x768 1524-61
Khz .85 40-120 Hz
35 Mitsubishi AM-3501R 640x480
15-35 Khz 1.0 40-75 Hz
33 Mitsubishi MegaView 33 (XC-3315C) 800x600 60 Hz
15-38 Khz .83 40-120 Hz
33 Mitsubishi Diamond Scan 33 1024x768 15-38
Khz .83 40-120 Hz
29 Mitsubishi MegaView Pro 29 (XC-2930C) 1280x1024 75 Hz 15-82
Khz .79 40-120 Hz
29 Mitsubishi Diamond Pro 29 1280x1024
15-82 Khz .79 40-120 Hz
29 Mitsubishi MegaView 29 (AM-2725A) 640x480 66 Hz 15-39
Khz .76 45-100 Hz
29 NEC MultiSync XM29 (XM2950) 1024x768 15-50 Khz .
75 40-100 Hz
29 ViewSonic ViewSonic 29 GA 1280x1024 60 Hz
15-64 Khz .75 45-160 Hz
28 Aydin Controls Spectrum Autosync 9026 800x600 15-38 Khz .74
50-90 Hz
27 Mitsubishi AM-2752A 640x480
15-39 Khz .76 45-100 Hz
27 Mitsubishi AM-2752 640x480
15-39 Khz .76 45-100 Hz
27 NEC MultiSync 4PG 1024x768
15-50 Khz 40-120 Hz
27 Sony PVM-2530/BS 640x200
15.734 Khz .73 59.9 Hz
26 Mitsubishi Diamond Pro 26M (HC3505SK) 800x600 15-38 Khz .31
45-90 Hz
24 Image Systems M24LV-65MAX 1280x1024 15-80 Khz
NA 55-90 Hz
21 Image Systems C21LV-65MAX 1280x1024 15-80 Khz .
29 55-90 Hz
21 Image Systems M21LMUMAX 2048x1536 15-65;
48-108 Khz NA 55-90 Hz
21 Image Systems M21LV-65MAX 1280x1024 15-80 Khz
NA 55-90 Hz
21 Sony PVM-2030/BS 640x200
15.734 Khz .55 59.9 Hz
20 Aydin Controls Spectrum Autosync 9008 1024x768 15-38 Khz .28
40-90 Hz
20 Mitsubishi Diamond Scan 20LF 800x600 15-38
Khz .31 45-90 Hz
20 Mitsubishi Diamond Scan 20LP (HC3925L9ATK) 800x600 15-38 Khz .31
45-90 Hz
20 Mitsubishi Diamond Scan 20M (HC3925ATK) 800x600 15-38 Khz .31
45-90 Hz
20 Sony GVM-2020 800x600
60 Hz 15-36 Khz .55 50-100 Hz
20 Taxan Supervision 970 640x480
60Hz 15-37 KHz .31 50-90 Hz
19 Barco CD-351
1024x768 15.5-23.5 Khz .32 50-60; 72-80 Hz
19 Conrac 7250
1280x1024 15.73-37 Khz .31 Hz
19 Microvitec 1019
800x600 15-36 Khz 40-100 Hz
17 Image Systems M17L-T 1600x1280
15-65/48-108 Khz NA 55-90 Hz
15 Electrohome C15 Series 15 1024x768
15-50 Khz .28 45-90 Hz
15 IDEK / Iiyama MF-5015 800x600
15.5-37 Khz 50-90 Hz
15 IDEK / Iiyama MF-5015A 800x600
60 Hz 15.5-38.5 Khz .31 50-90 Hz
15 Princeton Graphics Multiview II 640x870
15-70 Khz NA 75 Hz
14 AOC CM314
800x600 15-35 Khz .31 50-80 Hz
14 Commodore 1950 (AOC CM314) 800x600 15-35
Khz .31 50-80 Hz
14 Darius TSM-1431
800x600 15.75-39 Khz 50-90 Hz
14 IDEK / Iiyama MF-5014 800x600
15.5-37 Khz 50-90 Hz
14 Magnavox CM1352 640x200
15.7 Khz .42 47-62 Hz
14 Mitsubishi Diamond Scan 14 (AUM-1381A) 800x600 60 Hz
15.6-36 Khz .31 45-90 Hz
14 Mitsubishi FA-3415
800x600 15.7-35.5 Khz .28 45-80 Hz
14 Nanao FlexScan 8060S 640x480
15-35 Khz Hz
14 Nanao FlexScan 9060S 800x600
15.5-38.5 Khz .28 50-90 Hz
14 NEC MultiSync II
800x600 56 Hz 15.5-35 Khz .31 50-80 Hz
14 Panasonic PanaSync C-1391 1024x768 (i)
15.5-36 Khz .31 40-80 Hz
14 Princeton Graphics 1400 (Utra 1400)~A Multisync 15-36.5 Khz 45-120
Hz
14 Relisys RE-5155 800x600
15.5-35 Khz Hz
14 Sony GVM-1310 800x600 60 hz
15-36 Khz .25 50-100 Hz
14 Sony PVM-1354Q 640x200 15.734
Khz .25 59.97 Hz
14 Sony PVM-1351Q 640x200 15.734
Khz .37 59.97 Hz
14 Sony GVM-1311Q 800x600 60 Hz
15-36 Khz .25 50-100 Hz
14 Sony PVM-1390 640x200 15.734
Khz .37 59.97 Hz
14 Taxan Supervision 770+LR 640x48060Hz 15-35
KHz .31 50-90 Hz
14 Taxan Supervision 770+ 640x48060Hz 15-35
KHz .31 50-90 Hz
14 Taxan Supervision 775 640x48060Hz
15-38 KHz .28 50-90 Hz
14 Wen JM143E 800x600
15.75/30-37 Khz .68 48-90 Hz
13 Aydin Controls SP 1499 1280x1024 15-40
Khz .31 40-90 Hz
13 NEC Multisync 3DS 800x600 56 Hz
15.8-38 Khz .28 50-90 Hz
13 Sony CPD-1303 800x600
15.75-35.5 Khz .37 50-100 Hz
13 Sony CPD-1402E 640x480 60 Hz
15-34 Khz .25 50-100 Hz
13 Sony CPD-1302 800x600 60 Hz
15-34 Khz .25 50-100 Hz
13 Sony CPD-1302A 800x600 60 Hz
15-36 Khz .25 50-100 Hz
10 Sony CPD-9000 640x240 15.75
Khz

Chris Evans

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Aug 6, 2010, 6:12:29 AM8/6/10
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In article <50d101d9-9f35-4441...@s9g2000yqd.googlegroups.com>,

Xavier <URL:mailto:xlt...@gmail.com> wrote:
> Hello.
>
> Do you know if these monitors (CRT) :
> - NEC Multisync FE770
> - NEC Multisync A700
> are real multisync monitors ? (ie allowing to display VGA screen
> modes, but also low res modes as a mere RGB monitor (or TV) would do :
> full screen at 50 Hz, and not 'letter box' VGA style at higher
> frequencies).
> Thank you.

First you have to define what you mean by multisync!
There are various definitions.
Any monitor that can sync to more than one horizontal scan frequency is
sync'ing to multiple frequencies. Which 99% of monitors that offer faster
syncing than the 15KHz TV rate will do.

You want a monitor that will scan from 15KHz upwards.

Some monitors will do only very specific frequencies others will accept any
frequency within certain ranges or one continuous large range.

I think early NEC Multisync mainly do from 15KHz upwards in one continuous
large range.

> In fact I'm looking for a list of CRT monitors which are real
> multisync, to buy a few of them on Ebay.
> Thanks for your help.

Beware older CRTs tend to be fragile and dull

Chris Evans

--
CJE Micro's / 4D 'RISC OS Specialists'
Telephone: 01903 523222 Fax: 01903 523679
ch...@cjemicros.co.uk http://www.cjemicros.co.uk/
78 Brighton Road, Worthing, West Sussex, BN11 2EN
The most beautiful thing anyone can wear, is a smile!

Xavier

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Aug 6, 2010, 6:50:43 AM8/6/10
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On 6 août, 12:12, Chris Evans <ch...@cjemicros.co.uk> wrote:
> In article <50d101d9-9f35-4441-bd8b-204af77c0...@s9g2000yqd.googlegroups.com>,

>
> Xavier <URL:mailto:xlta...@gmail.com> wrote:
> > Hello.
>
> > Do you know if these monitors (CRT) :
> > - NEC Multisync FE770
> > - NEC Multisync A700
> > are real multisync monitors ? (ie allowing to display VGA screen
> > modes, but also low res modes as a mere RGB monitor (or TV) would do :
> > full screen at 50 Hz, and not 'letter box' VGA style at higher
> > frequencies).
> > Thank you.
>
> First you have to define what you mean by multisync!
[SNIP]

Well... I wrote :
'ie allowing to display VGA screen


modes, but also low res modes as a mere RGB monitor (or TV) would do :
full screen at 50 Hz, and not 'letter box' VGA style at higher
frequencies

'
I don't know what I should have added ;-)

Jeremy Nicoll - news posts

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Aug 6, 2010, 7:26:59 AM8/6/10
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Xavier <xlt...@gmail.com> wrote:

> Hello.
>
> Do you know if these monitors (CRT) :
> - NEC Multisync FE770
> - NEC Multisync A700
> are real multisync monitors ?

I have two NEC Multisync monitors (not the models you ask about) and they
sync to may things. I would expect that NEC's website will tell you the
spec of the models concerned, failing that googling for the model number and
"specification" should help.

--
Jeremy C B Nicoll - my opinions are my own.

Email sent to my from-address will be deleted. Instead, please reply
to newsre...@wingsandbeaks.org.uk replacing "aaa" by "284".

Dave Plowman (News)

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Aug 6, 2010, 8:30:15 AM8/6/10
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In article
<50d101d9-9f35-4441...@s9g2000yqd.googlegroups.com>,
Xavier <xlt...@gmail.com> wrote:
> Hello.

> Xavier.

If it's any help, I have a cheap LCD TV with a VGA input, and that does do
TV modes from the RPC that my 'real' LCD monitors won't.

--
*Why isn't 11 pronounced onety one? *

Dave Plowman da...@davenoise.co.uk London SW
To e-mail, change noise into sound.

Message has been deleted

Xavier

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Aug 6, 2010, 2:29:15 PM8/6/10
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On 6 août, 14:53, Stuart <Spam...@argonet.co.uk> wrote:
> In article
> <a04f9801-3088-4de6-bba5-6cca9f349...@14g2000yqa.googlegroups.com>,

>    Xavier <xlta...@gmail.com> wrote:
>
> > Well... I wrote :
> > 'ie allowing to display VGA screen
> > modes, but also low res modes as a mere RGB monitor (or TV) would do :
> > full screen at 50 Hz, and not 'letter box' VGA style at higher
> > frequencies
> > '
> > I don't know what I should have added ;-)
>
> Perhaps you should look at combined TV/monitors.
>
> If all else fails you could feed your 50Hz RGB in via the Scart connector.
>
> --
> Stuart Winsor

Hello.
Yes but it implies changing cables or using a switch ... not very
convenient as I switch from hi res to low res modes very often.

Xavier

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Aug 6, 2010, 2:29:53 PM8/6/10
to
[SNIP]

>
> If it's any help, I have a cheap LCD TV with a VGA input, and that does do
> TV modes from the RPC that my 'real' LCD monitors won't.
>
> --
> *Why isn't 11 pronounced onety one? *
>

>     Dave Plowman        d...@davenoise.co.uk           London SW


>                   To e-mail, change noise into sound.

Which brand and model, please ?

Dave Plowman (News)

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Aug 6, 2010, 6:52:25 PM8/6/10
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In article
<91cd4a19-e55b-43b2...@s9g2000yqd.googlegroups.com>,
Xavier <xlt...@gmail.com> wrote:
> [SNIP]

> >
> > If it's any help, I have a cheap LCD TV with a VGA input, and that
> > does do TV modes from the RPC that my 'real' LCD monitors won't.
> >

> Which brand and model, please ?

It's a bit of a no brand bought from CPC. DGM. It has an analogue tuner
only - no FreeView, so the same model probably not on sale these days.

--
*If a turtle doesn't have a shell, is he homeless or naked?

Dave Plowman da...@davenoise.co.uk London SW

Ron

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Aug 6, 2010, 10:23:54 PM8/6/10
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In message <50d101d9-9f35-4441...@s9g2000yqd.googlegroups.com>
Xavier <xlt...@gmail.com> wrote:

> In fact I'm looking for a list of CRT monitors which are real
> multisync, to buy a few of them on Ebay.
> Thanks for your help.
>
> Xavier.

Can you suggest a game that will try to use the mode you are
interested in. Easier than reconfiguring machines.
Chuckie Egg trys Mode 15 and Mode 21 but I dont know which one
it settles on.

Some of the smaller NEC's were just 60HZ VGA.
I have a Multisync 70 which is a 17 crt but NEC use this name for
LCD monitors also.
I think you will have to work with model numbers as well as names.

BTW there are LED LCD's available that have 50 frames/sec specified.

Ron M.

Xavier

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Aug 7, 2010, 6:49:15 AM8/7/10
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Hello everybody.

I've found this site very informative :

http://www.monitorworld.com/

If I'm not wrong multiscan monitors able to display low res and hi res
screen modes will show an horizontal frequency starting at 15 kHz.


Chris Joseph

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Aug 7, 2010, 7:37:32 AM8/7/10
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Ron <be...@woosh.co.nz> wrote:
>
>BTW there are LED LCD's available that have 50 frames/sec specified.

Not to seem picky, but by definition there is no such thing as an
LED LCD. There are some very nice LED monitors available, however,
and they have a lot of advantages over LCDs, never mind CRTs. "LCD"
is a specific type of display technology, not a generic term meaning
"flat-panel screen".

Chris.

Rob Kendrick

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Aug 7, 2010, 8:19:02 AM8/7/10
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On 07 Aug 2010 12:37:32 +0100 (BST)
Chris Joseph <chr...@chiark.greenend.org.uk> wrote:

You mean, apart from LED-backlit (rather than cold cathode) LCDs, which
I'm sure Ron was referring to? (I routinely hear them called 'LED
LCDs'.)

B.

Steve Fryatt

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Aug 7, 2010, 8:41:58 AM8/7/10
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On 7 Aug, Chris Joseph wrote in message
<8Kf*Ff...@news.chiark.greenend.org.uk>:

> Ron <be...@woosh.co.nz> wrote:
> >
> > BTW there are LED LCD's available that have 50 frames/sec specified.
>
> Not to seem picky, but by definition there is no such thing as an LED LCD.

I'd have thought an "LED LCD" was an LCD flatpanel with LED backlight (to
differentiate from those LCDs with cold-cathode backlights?

--
Steve Fryatt - Leeds, England

http://www.stevefryatt.org.uk/

Ron

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Aug 8, 2010, 9:54:20 PM8/8/10
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In message <9f3bbdd9-4cd6-4182...@v15g2000yqe.googlegroups.com>
Xavier <xlt...@gmail.com> wrote:

> If I'm not wrong multiscan monitors able to display low res and hi res
> screen modes will show an horizontal frequency starting at 15 kHz.
>

I dont agree. My Viewsonic 21 is specified as 30-82khz/50-150Hz and it
displays anything I throw at it fullscreen. (including low res 50Hz)

This Viewsonic LED LCD specifies 24-82khz/50-75Hz so I think the
chances would be very good. I think this would be a good match for
a beagleboard also. (one VGA, one DVI connector)

http://ap.viewsonic.com/za/products/productspecs.php?id=414

They are $NZ200 new here, in UK should be less than 100ukp.

Ron M.

Chris Evans

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Aug 9, 2010, 5:29:49 AM8/9/10
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In article <d4d5da4...@ron1954.woosh.co.nz>, Ron

<URL:mailto:be...@woosh.co.nz> wrote:
> In message <9f3bbdd9-4cd6-4182...@v15g2000yqe.googlegroups.com>
> Xavier <xlt...@gmail.com> wrote:
>
> > If I'm not wrong multiscan monitors able to display low res and hi res
> > screen modes will show an horizontal frequency starting at 15 kHz.
> >
>
> I dont agree. My Viewsonic 21 is specified as 30-82khz/50-150Hz and it
> displays anything I throw at it fullscreen. (including low res 50Hz)

If it starts scanning at 30KHz then it can't do 15KHz modes like MODES 0-15.
From the A5000 onwards (Or earlier models with VIDC enhancer fitted) you
could tell it you had a VGA or SVGA monitor and it increased the scan speed
when MODES 0 to 15 were selected, though you normally got them in letterbox
fashion!

I don't know how you are getting MODES 0-15 on a 30KHz monitor fullscreen!

n.b. Some games and educational software 'designed' there own modes by
writing to VIDC, which could be a problem.



> This Viewsonic LED LCD specifies 24-82khz/50-75Hz so I think the
> chances would be very good. I think this would be a good match for
> a beagleboard also. (one VGA, one DVI connector)
>
> http://ap.viewsonic.com/za/products/productspecs.php?id=414
>
> They are $NZ200 new here, in UK should be less than 100ukp.
>
> Ron M.
>

Ron

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Aug 9, 2010, 8:37:47 AM8/9/10
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In message <ant09094...@client.cjemicros.co.uk>
Chris Evans <ch...@cjemicros.co.uk> wrote:

> In article <d4d5da4...@ron1954.woosh.co.nz>, Ron
> <URL:mailto:be...@woosh.co.nz> wrote:
> > In message <9f3bbdd9-4cd6-4182...@v15g2000yqe.googlegroups.com>
> > Xavier <xlt...@gmail.com> wrote:
> >
> > > If I'm not wrong multiscan monitors able to display low res and hi res
> > > screen modes will show an horizontal frequency starting at 15 kHz.
> > >
> >
> > I dont agree. My Viewsonic 21 is specified as 30-82khz/50-150Hz and it
> > displays anything I throw at it fullscreen. (including low res 50Hz)
>
> If it starts scanning at 30KHz then it can't do 15KHz modes like MODES 0-15.
> From the A5000 onwards (Or earlier models with VIDC enhancer fitted) you
> could tell it you had a VGA or SVGA monitor and it increased the scan speed
> when MODES 0 to 15 were selected, though you normally got them in letterbox
> fashion!
>
> I don't know how you are getting MODES 0-15 on a 30KHz monitor fullscreen!
>
> n.b. Some games and educational software 'designed' there own modes by
> writing to VIDC, which could be a problem.
>

I used this monitor with a RiscPc long before the Iyonix and can't
recall ever having a letterbox display.
I have used *Wimpmode 15 and I am writing this in a full height desktop.
I only have a dozen lines available in the window and the text is big.
Maybe it 'is' a letterbox mode that is oversizing itself.
You could be right, and it is possible I just haven't had a program
that demands Mode 0-15.

Ron M.

Chris Joseph

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Aug 9, 2010, 10:05:43 AM8/9/10
to

Chris Evans <ch...@cjemicros.co.uk> wrote:
> Ron <URL:mailto:be...@woosh.co.nz> wrote:
>> I dont agree. My Viewsonic 21 is specified as 30-82khz/50-150Hz and it
>> displays anything I throw at it fullscreen. (including low res 50Hz)
>
>If it starts scanning at 30KHz then it can't do 15KHz modes like MODES 0-15.

Unless the monitor is smart enough to do automatic line-doubling on
15kHz modes, which isn't impossible with modern kit. I would
probably have expected this to be pretty obvious with the rectangular
pixel modes (since you wind up with pixels that are four times as tall
as they are wide), but much less so with square-pixel modes.

Chris.

Chris Joseph

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Aug 9, 2010, 10:09:25 AM8/9/10
to
Rob Kendrick <nn...@rjek.com> wrote:

>Chris Joseph <chr...@chiark.greenend.org.uk> wrote:
>>
>> Not to seem picky, but by definition there is no such thing as an
>> LED LCD. There are some very nice LED monitors available, however,
>> and they have a lot of advantages over LCDs, never mind CRTs. "LCD"
>> is a specific type of display technology, not a generic term meaning
>> "flat-panel screen".
>
>You mean, apart from LED-backlit (rather than cold cathode) LCDs, which
>I'm sure Ron was referring to? (I routinely hear them called 'LED
>LCDs'.)

I'd not heard them described as such; I have encountered cases of
manufacturers labelling them as "LED screens" in the hope of
misleading customers. I suspect enough of the people I know are
annoyed by the latter problem to make us all take care to be very
clear what technology we're talking about at any given moment. (I
would definitely put in the extra word for clarity, myself.)

Chris.

druck

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Aug 9, 2010, 12:07:05 PM8/9/10
to
On 9 Aug 2010 Chris Evans <ch...@cjemicros.co.uk> wrote:
> I don't know how you are getting MODES 0-15 on a 30KHz monitor fullscreen!

Probably using 100Hz non letter boxed modes, which are > 30KHz.

A set was supplied with GameOn/StronGuard (which also had VSYNC
correction, so games that relied on a 50Hz rate wouldn't run at
twice normal speed), and there are some other versions about.

---druck

--
The ARM Club Free Software - http://www.armclub.org.uk/free/
32 bit Conversions Page - http://www.armclub.org.uk/32bit/

Ron

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Aug 9, 2010, 11:27:52 PM8/9/10
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In message <24e82844...@druck.freeuk.net>
druck <ne...@druck.freeuk.com> wrote:

> On 9 Aug 2010 Chris Evans <ch...@cjemicros.co.uk> wrote:
> > I don't know how you are getting MODES 0-15 on a 30KHz monitor fullscreen!
>
> Probably using 100Hz non letter boxed modes, which are > 30KHz.
>
> A set was supplied with GameOn/StronGuard (which also had VSYNC
> correction, so games that relied on a 50Hz rate wouldn't run at
> twice normal speed), and there are some other versions about.
>

I think you are right Dave, It does Mode 20 with no flicker,
and Mode 28 with noticeable flicker.
Incidentally, if I use the Iconbar method to select Mode 15,
it displays all of the lines properly. (Not nice for anything
except games I expect)
It can be confusing working with RISC OS modes and then
the monitor has a memory of modes of its own as well.
It is possible to get various results.
It's not a problem I normally run into, In fact the monitor
has been no trouble at all on a day to day basis for
probably ten years, and it was used when I got it.
The question would be wether this 'high end' monitor feature
is carried on with the modern LCD.
The fact that the VA1938w-LED specifies 50Hz would make me
try that one before one that doesn't in the hope you would
get the same feature.
I just noticed that Netsurf doesn't display properly in
Mode 20 although the desktop is excellent.
In my normal Desktop, screencaptures involving a Netsurf
window display strangely unless 'Draw using tinct' is
unticked.
I guess Netsurf is doing something unconventional.

Ron M.

Charlie

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Aug 10, 2010, 4:27:58 AM8/10/10
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FWVLIW:
This subject goes round & round Amiga forums too...

The basic problem is the vast majority of 'modern' monitors won't sync
down to 15Khz (mentioned earlier).

Assuming we're talking LCD's you do have options:

-Go for a monitor with a SCART input.
These should scan down to TV frequencies but it means making up a new
lead and maximum resolution will be limited - not an issue with a pre-
RiscPC machine.
-Go for a LCD TV that has VGA.
The majority of these will also scan down to TV frequencies on VGA
BUT:
Not all do
Some produce really awful results
The majority are 'no-name' bought in a supermarket jobs. So there's no
product number to check and when there is there's no guarantee a
'known-working' display will have the spec today as one bought
previously, so it's pot-luck.
-LCD monitors that do sync to 15khz.
They do exist but are very rare, usually very expensive, and the
manufacturers almost never say so. For these you're best off trawling
some retro (Amiga) forums...
-Most projectors will sync to 15Khz
And they say so in the specs! Assuming you want to project your
output.
-Get an adaptor box
Here's a cheep one:
http://cgi.ebay.co.uk/Laptop-VGA-TV-AV-Video-adapter-Converter-Switch-Box-/370418207916?cmd=ViewItem&pt=UK_Computing_CablesConnectors_RL&hash=item563ea54cac#ht_6640wt_802
VGA of any sort in one end, S-Video out the other...
Usually the VGA In -> Out on these boxes is just a pass-through, but
you may be lucky.
Once you have S-Video your options open up a lot!
TV with S-Video, PC/Iyonix with a TV-Card...
You do loose a little quality but not much and are limited to 800x600
(maybe more) but that's ok for a classic Arc'.

If we're talking computers:

Arc':
-A VIDC-Enhancer will solve many (not all) your problems.
There can be issues with VIDC-bandwidth, sound output, game speed
-If your monitor will manage 'VGA' modes from your Arc' there are
replacement modes you can soft-load
Memory used
No good for games running non-standard modes
Bandwidth issues
Timing issues
Games running @ the wrong speed

RiscPC-alike:
Get a monitor that will sync to 100Khz. These do exist but are often
not cheep. You can then use one of the 100Khz monitor definition files
to sort all your TV-mode woes - Do check the expectations of the MDF
against your chosen monitor VERY carefully, they were designed for CRT
multisyncs not LCD's.
(!GameOn, !StrongGuard -Doggy Soft)

I hope that helps a bit.

Dave Plowman (News)

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Aug 10, 2010, 4:44:58 AM8/10/10
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In article
<86075a5f-d768-4b14...@f6g2000yqa.googlegroups.com>,

Charlie <charle...@googlemail.com> wrote:
> -Go for a LCD TV that has VGA. The majority of these will also scan down
> to TV frequencies on VGA BUT: Not all do Some produce really awful
> results The majority are 'no-name' bought in a supermarket jobs. So
> there's no product number to check and when there is there's no
> guarantee a 'known-working' display will have the spec today as one
> bought previously, so it's pot-luck.

I have a Humax LCD TV which has a VGA connector. Never tried it - but it's
hardly a 'no-name' brand. My main TV also has one - that's a Sagem DLP
rear projector.

The one I do use the VGA connector on is in the workshop and it's a 'no
name' bought from CPC. It's the only display I have which will give a
picture from an RPC after a reset to defaults - neither of my pukka LCD
monitors will.

It's situated above the workbench and is fed via a DA from the RPC or PC.
Handy if following a circuit diagram, etc. Which is why I bought it - the
ability to sync to lower display rates a bonus.

--
*He had a photographic memory which was never developed*

Xavier

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Aug 10, 2010, 6:29:59 AM8/10/10
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> Here's a cheep one:http://cgi.ebay.co.uk/Laptop-VGA-TV-AV-Video-adapter-Converter-Switch...

Well.
Thanks for your excellent explanations.
(Read 100 Hz and not 100 Khz at the end of your text).
In particular, thank you for letting me know that the mentioned
adapters do work.
I had seen them on sale on Ebay, and couldn't believe they would work
correctly, as this kind of low prices make me suspicious.
I've just ordered some units, it should do the job.

Thanks to everybody for your time spent helping me.

Regards,
Xavier.

Chris Evans

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Aug 10, 2010, 8:10:41 AM8/10/10
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In article <cbbe154...@ron1954.woosh.co.nz>, Ron

<URL:mailto:be...@woosh.co.nz> wrote:
> In message <ant09094...@client.cjemicros.co.uk>
> Chris Evans <ch...@cjemicros.co.uk> wrote:
>
> > In article <d4d5da4...@ron1954.woosh.co.nz>, Ron
> > <URL:mailto:be...@woosh.co.nz> wrote:
> > > In message <9f3bbdd9-4cd6-4182...@v15g2000yqe.googlegroups.com>
> > > Xavier <xlt...@gmail.com> wrote:
> > >
> > > > If I'm not wrong multiscan monitors able to display low res and hi res
> > > > screen modes will show an horizontal frequency starting at 15 kHz.
> > > >
> > >
> > > I dont agree. My Viewsonic 21 is specified as 30-82khz/50-150Hz and it
> > > displays anything I throw at it fullscreen. (including low res 50Hz)
> >
> > If it starts scanning at 30KHz then it can't do 15KHz modes like MODES 0-15.
> > From the A5000 onwards (Or earlier models with VIDC enhancer fitted) you
> > could tell it you had a VGA or SVGA monitor and it increased the scan speed
> > when MODES 0 to 15 were selected, though you normally got them in letterbox
> > fashion!
> >
> > I don't know how you are getting MODES 0-15 on a 30KHz monitor fullscreen!
> >
> > n.b. Some games and educational software 'designed' there own modes by
> > writing to VIDC, which could be a problem.
> >
>
> I used this monitor with a RiscPc long before the Iyonix and can't
> recall ever having a letterbox display.
> I have used *Wimpmode 15 and I am writing this in a full height desktop.
> I only have a dozen lines available in the window and the text is big.

Mmm MODE 15 & WIMPMODE 15 are both 32 lines high!

> Maybe it 'is' a letterbox mode that is oversizing itself.
> You could be right, and it is possible I just haven't had a program
> that demands Mode 0-15.

One of the menu options on the monitor should tell you what scan speed &
refreshrate you are getting!

Chris Evans

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Aug 10, 2010, 8:11:51 AM8/10/10
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In article <24e82844...@druck.freeuk.net>, druck

<URL:mailto:ne...@druck.freeuk.com> wrote:
> On 9 Aug 2010 Chris Evans <ch...@cjemicros.co.uk> wrote:
> > I don't know how you are getting MODES 0-15 on a 30KHz monitor fullscreen!
>
> Probably using 100Hz non letter boxed modes, which are > 30KHz.
>
> A set was supplied with GameOn/StronGuard (which also had VSYNC
> correction, so games that relied on a 50Hz rate wouldn't run at
> twice normal speed), and there are some other versions about.

I suspect quite a few LCDs won't like the GameOn/StronGuard MODES!

Ron

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Aug 10, 2010, 6:43:14 PM8/10/10
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In message <ant10124...@client.cjemicros.co.uk>
Chris Evans <ch...@cjemicros.co.uk> wrote:

> > I used this monitor with a RiscPc long before the Iyonix and can't
> > recall ever having a letterbox display.
> > I have used *Wimpmode 15 and I am writing this in a full height desktop.
> > I only have a dozen lines available in the window and the text is big.
>
> Mmm MODE 15 & WIMPMODE 15 are both 32 lines high!
>

I get the correct number if I select Mode 15 from the iconbar.



> > Maybe it 'is' a letterbox mode that is oversizing itself.
> > You could be right, and it is possible I just haven't had a program
> > that demands Mode 0-15.
>
> One of the menu options on the monitor should tell you what scan speed &
> refreshrate you are getting!

This is probably the last model that has no OSD (or LCD).
It uses a well labelled button panel.
As I said earlier it has been no problem running available RISC OS apps
for years. (Prove me wrong with an example?)
I have many old monitors that are 15khz multiscan types but they dont
have flat screens, and a lot suffer from diminishing width.
I read on a forum that dried capacitors causes this lack of width,
but components aren't cheap, so I dont think I will be spending time
on them.
Ron M.

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