Silly OCS/ECS/AGA display question

Fingerlickin_B · 11 September 2008, 05:10

Stupid questions time

Please see this auction:

http://cgi.ebay.com/Amiga-Video-Adapter-to-PC-monitor-VGA-MultiSync-new_W0QQitemZ170260750993QQihZ007QQcategoryZ98928QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

This is the phrase that confuses me:
“If you don't have a such 15 khz monitor, you can use the adaptor only for the Amiga 1200 / 4000”

What exactly does this mean? Do AGA machines output at a higher frequency? I didn’t know that!

PZ.

rkauer · 11 September 2008, 05:51

yep, A1200/4000 can use productivity "driver" or DBL_NTSC or DBL_PAL (you need the VGAonly "driver" on the monitors drawer, too).

Only useful to Workbench and applications who uses the same WB resolution. Don't work with games and applications who use their own screen mode (normally 15kHz).

Those "drivers" forces AGA chipset to generate a 31kHz screen mode. Slow as hell, of course.

Fingerlickin_B · 11 September 2008, 05:54

Quote:

Originally Posted by rkauer

yep, A1200/4000 can use productivity "driver" or DBL_NTSC or DBL_PAL (you need the VGAonly "driver" on the monitors drawer, too).

Only useful to Workbench and applications who uses the same WB resolution. Don't work with games and applications who use their own screen mode (normally 15kHz).

Those "drivers" forces AGA chipset to generate a 31kHz screen mode. Slow as hell, of course.

Perfect answer, thanks Rkauer!

I already knew you could force Workbench to do 31kHz, but of course with the seller saying what they did it seemed very cofusing.

This means heaps of A1200 owners will buy his product & find it's not doing what they hoped it would...dishonesty on his part I say!

PZ.

T_hairy_bootson · 11 September 2008, 06:15

Hmm, it does exactly what he says it will do. I have a couple of these type of adapters already and they are needed if you want to hook up a vga monitor multisync or otherwise to the 23 pin video connector on the amiga.

Fingerlickin_B · 11 September 2008, 06:40

It's in the wording man, maybe because he's German, or maybe just because he doesn't think dumbasses like me will get confused

BTW, I have an old-as-the-hills monitor at home I'd like to try & have scoured Aminet for schematics...to no avail. Anyone got a schematic to make on of these?

PZ.

TheCorfiot · 11 September 2008, 10:38

@fingers

As far as I am aware my friend they are passive, simply a cable convertor.
So using pinouts for the Amiga 23 pin & std VGA connectors, you should be able to wire one up quite easily.

Don't forget the piccies

TC

Fingerlickin_B · 11 September 2008, 11:35

Cool man, leaving on an interstate trip tomorrow, but I've already got the 23 pin connector, so will look for the pinouts & chuck something together next week

PZ.

11 September 2008, 05:10	#1
Fingerlickin_B Amiga Nut Join Date: Oct 2006 Location: Belco, Australia Posts: 2,242	Silly OCS/ECS/AGA display question Stupid questions time Please see this auction: http://cgi.ebay.com/Amiga-Video-Adapter-to-PC-monitor-VGA-MultiSync-new_W0QQitemZ170260750993QQihZ007QQcategoryZ98928QQssPageNameZWDVWQQrdZ1QQcmdZViewItem This is the phrase that confuses me: “If you don't have a such 15 khz monitor, you can use the adaptor only for the Amiga 1200 / 4000” What exactly does this mean? Do AGA machines output at a higher frequency? I didn’t know that! PZ.

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11 September 2008, 05:51	#2
rkauer I hate potatos and shirts Join Date: Oct 2007 Location: Sao Leopoldo / Brazil Age: 58 Posts: 3,482	yep, A1200/4000 can use productivity "driver" or DBL_NTSC or DBL_PAL (you need the VGAonly "driver" on the monitors drawer, too). Only useful to Workbench and applications who uses the same WB resolution. Don't work with games and applications who use their own screen mode (normally 15kHz). Those "drivers" forces AGA chipset to generate a 31kHz screen mode. Slow as hell, of course.

11 September 2008, 06:15	#4
T_hairy_bootson Workbitch 1.3 Join Date: Oct 2001 Location: Melbourne, Australia Age: 46 Posts: 2,084	Hmm, it does exactly what he says it will do. I have a couple of these type of adapters already and they are needed if you want to hook up a vga monitor multisync or otherwise to the 23 pin video connector on the amiga.

11 September 2008, 06:40	#5
Fingerlickin_B Amiga Nut Join Date: Oct 2006 Location: Belco, Australia Posts: 2,242	It's in the wording man, maybe because he's German, or maybe just because he doesn't think dumbasses like me will get confused BTW, I have an old-as-the-hills monitor at home I'd like to try & have scoured Aminet for schematics...to no avail. Anyone got a schematic to make on of these? PZ.

11 September 2008, 10:38	#6
TheCorfiot Amibay Senior Staff Join Date: Feb 2008 Location: Cardiff / Wales Posts: 1,302	@fingers As far as I am aware my friend they are passive, simply a cable convertor. So using pinouts for the Amiga 23 pin & std VGA connectors, you should be able to wire one up quite easily. Don't forget the piccies TC

11 September 2008, 11:35	#7
Fingerlickin_B Amiga Nut Join Date: Oct 2006 Location: Belco, Australia Posts: 2,242	Cool man, leaving on an interstate trip tomorrow, but I've already got the 23 pin connector, so will look for the pinouts & chuck something together next week PZ.

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