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Author Topic: Why did Commodore put monochrome video output on A500/A2000?  (Read 17262 times)

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Offline Ral-ClanTopic starter

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Why did Commodore put monochrome video output on A500/A2000?
« on: January 21, 2013, 07:03:06 PM »
Why in the world did Commodore choose to put a monochrome composite video output jack onto the A500/A2000?

They already had years of experience adding colour video output to their 8-bit line of computers (VIC-20, C64, TED, etc.)

The Amiga 1000 that came beforehand had composite colour output. The later A600 and A1200 had colour composite output.

But they chose greyscale / black & white video output for the A500 / A2000.

The Amiga was marketed as a multimedia machine - colour was important to its image. Why take this step backward?

Monochrome composite output is almost useless. I never used it. Did anyone really use this feature, other than for quickly testing your machine on a TV when a monitor wasn't available, or as a stopgap measure until you got afford a real monitor or an A520 RF modulator?

It seems like such a lost opportunity, too - as having a COLOUR video composite output would have been quite handy for desktop video people who wanted a secondary display, for hooking the Amiga up to a larger TV or video projector for presentations to groups, for recording the Amiga's colour video output to video tape, etc. etc.  It would also have helped sell the Amiga to those on a budget who wanted it only for gaming - they could have bought an A500 and hooked it up to a TV instead of buying a monitor.

But instead someone made the decision that it would be monochrome.  WHY?!

It just doesn't make a lot of sense, in retrospect.  There are only two reasons that I can think of that would explain why Commodore did it:

1. It saved a few cents of production cost per machine,
2. or initially there was no composite output planned for the A500/2000, and some innovative engineer figured out that it would be simple to add a monochrome (luma) output without adding much cost to the design.
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Offline Ral-ClanTopic starter

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Re: Why did Commodore put monochrome video output on A500/A2000?
« Reply #1 on: January 21, 2013, 08:05:15 PM »
Quote from: Dr.Bongo;723459
Wasn't it something to do with word processing? green/gray screen typing was all the rage then.


Maybe, but a composite video output would barely give you the sharpness to do actual word-processing.  It would be pretty hard on the eyes, anyway.
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Offline Ral-ClanTopic starter

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Re: Why did Commodore put monochrome video output on A500/A2000?
« Reply #2 on: January 22, 2013, 12:45:16 PM »
Quote from: psxphill;723487
They did ship the a500's with modulators that have colour composite, so it wasn't completely a cost issue.

I never saw that here in Canada, where were you located?  My A500 did not come with a modulator and none of my friends A500s did either. You had to buy it separately here. Maybe with one of the later early-1990s era "pack" bundles this changed, but by that time the Amiga in Canada was fading fast and I never saw those here.
« Last Edit: January 22, 2013, 12:53:47 PM by ral-clan »
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Offline Ral-ClanTopic starter

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Re: Why did Commodore put monochrome video output on A500/A2000?
« Reply #3 on: January 22, 2013, 09:21:12 PM »
Quote from: psxphill;723585
The a500 was a cost reduced machine, part of that cost reduction was removing the colour from the horribly bad A1000 composite.

Okay, then why didn't they put monochrome composite into the A2000 - the pro-level machine in that year's lineup?
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Offline Ral-ClanTopic starter

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Re: Why did Commodore put monochrome video output on A500/A2000?
« Reply #4 on: January 22, 2013, 09:23:45 PM »
Quote from: ChaosLord;723515
Just to be clear: The built in composite output of an A500 is way beyond PC land monochrome.  A500 composite is 64 shades of gray easily displayable at once from a palette of 4096 gray shades.

Well, it's really monochrome (black or white output) but each pixel can be at a different shade of intensity (luma signal amplitude I'm assuming).
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Offline Ral-ClanTopic starter

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Re: Why did Commodore put monochrome video output on A500/A2000?
« Reply #5 on: January 22, 2013, 10:56:27 PM »
Quote from: bloodline;723615
The A500 and the A2000 were designed and build two totally separate teams, they probably didn't even know about each other. The A500 team were looking to cost reduce as much as possible and as Zac had already pointed out, with the video hybrid in the A500 you get monochrome Composite for free, so I guess they just added it as better than nothing :)

Are you sure about that?  I know the *original* A2000 (the A2000-A) was designed by a German team, while the A500 was designed by an American team. These two teams didn't really co-operate.

But that A2000 (based more on A1000 architecture) was abandoned. The A2000-B that was actually produced was based on the A500 motherboard. And from my understanding it was developed by the same team that designed the A500. (I would like confirmation of this info).

Here is a history:
http://www.amigahistory.co.uk/a2000.html
Music I've made using Amigas and other retro-instruments: http://theovoids.bandcamp.com