Author Topic: And while we're at it.. wtf is this?  (Read 6640 times)

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Offline Bryce

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Offline arnoldemu

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Re: And while we're at it.. wtf is this?
« Reply #1 on: 14:29, 10 September 10 »
Was this a magazine project?

http://cgi.ebay.de/CPC-Bremse-CPC-Slow-Motion-ultra-rare-collectors-item-/200516296511?pt=Klassische_Computer&hash=item2eafb3df3f

Bryce.
I think I've seen this before. And I may even have an article about it within my really old cpc web documents.
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Offline Bryce

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Re: And while we're at it.. wtf is this?
« Reply #2 on: 15:08, 10 September 10 »
Post the details on the Wiki, if you find them. Maybe I'll build a few if anyones interested :o)

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Offline MacDeath

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Re: And while we're at it.. wtf is this?
« Reply #3 on: 16:59, 10 September 10 »
Something that makes CPC runs slowlier ? WTF ? no really need for this lol...


Well, perhaps an extension that force many interuptions ?

Offline Bryce

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Re: And while we're at it.. wtf is this?
« Reply #4 on: 17:37, 10 September 10 »
It's probably using the CLK pin to insert wait states in each cycle or something similar. We'll know when arnoldemu finds the schematic.

Bryce.

Offline arnoldemu

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Re: And while we're at it.. wtf is this?
« Reply #5 on: 17:54, 10 September 10 »
It's probably using the CLK pin to insert wait states in each cycle or something similar. We'll know when arnoldemu finds the schematic.

Bryce.
well I'll have a good rummage through my documents. Hopefully I'll find this one, if not I'll find some info on some other slomo devices.
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Offline Gryzor

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Re: And while we're at it.. wtf is this?
« Reply #6 on: 10:50, 12 September 10 »
Is anyone buying this?

Offline MacDeath

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Re: And while we're at it.. wtf is this?
« Reply #7 on: 02:37, 13 September 10 »
My Amstrads are slow enough thx you... ;D


Offline Bryce

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Re: And while we're at it.. wtf is this?
« Reply #9 on: 10:42, 13 September 10 »
Interesting and pretty simple, it's just "messsing" with the Ready signal to slow things down, but it doesn't sync with the CPCs clock signal, so the delay could be "un-even", ie: some commands run at full speed, some delayed.

Bryce.

Offline TFM

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Re: And while we're at it.. wtf is this?
« Reply #10 on: 05:29, 14 September 10 »
It's probably using the CLK pin to insert wait states in each cycle or something similar. We'll know when arnoldemu finds the schematic.

Bryce.

 
A looong time ago, I built a similar but better device, which is able to reduce speed as much as you like - using a poti. It uses the wait pin of the cpu. Runs without problems. It was described in an old Happy Computer issue.
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Offline TFM

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Re: And while we're at it.. wtf is this?
« Reply #11 on: 05:30, 14 September 10 »
My Amstrads are slow enough thx you... ;D

 
Slow? Not at all :-)) The coder makes the speed :-)))
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Offline Bryce

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Re: And while we're at it.. wtf is this?
« Reply #12 on: 10:57, 14 September 10 »
The Ready signal on the Expansion Port is the Wait signal on the CPU, Amstrad just decided to re-label it. The Spanish magazine uses this to slow the CPC as well, just I don't think they implimented it very well, because it's kind of random.

Bryce.

Offline arnoldemu

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Re: And while we're at it.. wtf is this?
« Reply #13 on: 11:37, 14 September 10 »
well I'll have a good rummage through my documents. Hopefully I'll find this one, if not I'll find some info on some other slomo devices.
I looked through my old e-mails and files and found nothing.
I did a search on comp.sys.amstrad.8bit and came up with an article where Andreas Grosche mentioned he had one and would send me a picture of it:

http://groups.google.com/group/comp.sys.amstrad.8bit/browse_thread/thread/5783088864d7ac41/8b30ea685913209c?lnk=gst&q=slomo#8b30ea685913209c
http://groups.google.com/group/comp.sys.amstrad.8bit/browse_thread/thread/5783088864d7ac41/8b30ea685913209c?lnk=gst&q=slomo#8b30ea685913209c

I remember saving this picture to my computer, but I don't have it anymore.

Reading through the other posts, I am sure it works the same.
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Offline arnoldemu

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Re: And while we're at it.. wtf is this?
« Reply #14 on: 11:38, 14 September 10 »
So with all of these they use the wait signal. This means that the video should continue without interruption.
However, this does mean, that demos that use rupture can't be stopped, because the rupture would be broken.
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Offline TFM

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Re: And while we're at it.. wtf is this?
« Reply #15 on: 23:35, 14 September 10 »
The Ready signal on the Expansion Port is the Wait signal on the CPU.
Bryce.

Ah thanks!  :)  You are the hardware expert, glad to have you here!  :)
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Offline OCT

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CPC Slow Motion
« Reply #16 on: 01:40, 10 January 11 »

Offline TFM

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Re: And while we're at it.. wtf is this?
« Reply #17 on: 21:43, 10 January 11 »
Maybe I shall sell mine too, but the good thing is I can slow down the CPC stepless.
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Offline CPCIak

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Re: And while we're at it.. wtf is this?
« Reply #18 on: 15:56, 21 January 11 »
Could someone scan the HappyComputer or CPCAI article, please.

Offline TFM

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Re: And while we're at it.. wtf is this?
« Reply #19 on: 21:21, 21 January 11 »
The Happy Computer one works fine.
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Offline OCT

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Re: And while we're at it.. wtf is this?
« Reply #20 on: 17:00, 20 February 11 »
Another one for the 6128 in particular is at http://cgi.ebay.de/ws/eBayISAPI.dll?ViewItem&item=200578321574

Offline Bryce

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Re: And while we're at it.. wtf is this?
« Reply #21 on: 10:00, 21 February 11 »
I never saw the point of these slow motion thingies, the CPC is slow enough as it is. If anyone is interested in a plan / layout for this kind of thing, then let me know and I'll do one up.

Bryce.

Offline robcfg

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Re: And while we're at it.. wtf is this?
« Reply #22 on: 13:41, 21 February 11 »
Well, it is useful if you have trouble with Orion Prime's minigames...  :D


Might sound evil, but I'm only joking, hehehe!

Offline TFM

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Re: And while we're at it.. wtf is this?
« Reply #23 on: 00:38, 22 February 11 »
In the old times such a slowdown has been very useful for debugging. Having said this, I must admit, that emus are way more efficient in debugging today. (Even if I don't like that fact).
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Offline Bryce

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Re: And while we're at it.. wtf is this?
« Reply #24 on: 12:01, 22 February 11 »
Emulators are good if you don't own the real hardware, but I've never understood people who have a real CPC packed away in a box and choose to use the emulator instead. It's like owning a Ferrari that's parked in the garage, but then staying at home to play Need For Speed.

Bryce.