Falcon 040 Afterburner for sale

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Chandler
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Falcon 040 Afterburner for sale

Postby Chandler » Tue Apr 18, 2017 6:24 pm

This was removed working from a working Falcon, foolishly i didn't take pictures of it working at the time :oops:

Anyway it works and comes with some install/test disks

I am not sure what capacity the memory is on the card, it has 2 x slots and 1 x slot is populated with a simm

The pictures are of the actual card and the wiring to connect it to the Falcon (wiring included)

As far as i know it's quite an easy installation with no modding needed to the original motherboard

The Afterburner can NOT be fitted inside the standard Falcon factory plastic case, you would need to re-house your Falcon is some kind of rack case or similar, and this was indeed the reason i removed this card as i wanted to return the Falcon to it's original spec.

Only to be installed by someone who knows what they are doing

£175 or nearest sensible offer

shipping extra, will ship worldwide with tracked shipping only


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mikro
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Re: Falcon 040 Afterburner for sale

Postby mikro » Tue Apr 18, 2017 11:15 pm

OMG, I have never realised how huge the AB040 is. Such a waste of space, compare it to the CT60e. But to be fair, it's far older the the first CT60.

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Re: Falcon 040 Afterburner for sale

Postby joska » Wed Apr 19, 2017 7:36 am

mikro wrote:OMG, I have never realised how huge the AB040 is. Such a waste of space, compare it to the CT60e.


It is smaller than the CT60e... The difference is that the CT60e sits much further back in the case, allowing the keyboard to fit.
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Re: Falcon 040 Afterburner for sale

Postby mikro » Wed Apr 19, 2017 8:22 am

Yeah, but the CT60e is made like this deliberately -- to provide better stability and yes, to allow the keyboard + addons fit in the standard case. I don't see any deliberate design choices in the AB. :D

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Re: Falcon 040 Afterburner for sale

Postby joska » Wed Apr 19, 2017 8:28 am

It is deliberately designed to allow the usage of the stock PSU, and to fit cases like the CLAB Mk X, Desktopper, DDD etc. It is also - unlike the CT60 - designed to allow the usage of more than one expansion board. So it makes little sense to fit it inside a stock case.
Last edited by joska on Tue Aug 01, 2017 9:19 pm, edited 1 time in total.
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Re: Falcon 040 Afterburner for sale

Postby Rustynutt » Tue Aug 01, 2017 5:27 am

Honestly, CT60 included, you haven't used a Falcon until you use an Afterburner at 44mhz and NOVA ATI MACH 64 :)
Games aside, as I never play, it's as compatible as it gets. At one time had a PC Speed, Expose and NOVA installed. Easy as pie.
Wasn't until the SV arrived the NOVA setup really became dated. But then, what to do with all the other cards?
Buy another Afterburner :) Now I have two.

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Re: Falcon 040 Afterburner for sale

Postby leech » Tue Aug 01, 2017 7:24 am

Ha, and here I have a weird Y key on a UK keyboard, and a SV that is stubbornly not working. But hey, at least my NVRAM is newish and I got the CT60e to 80MHz nice and stable. I haven't tried to clock it higher. Holy crap TOS is fast at that speed.
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Re: Falcon 040 Afterburner for sale

Postby Rustynutt » Tue Aug 01, 2017 7:30 am

Yes, blistering fast. Mine runs at 100mhz easy, fan only.
Lots of benchmark programs and ways to compare speed. The best one I've found for seat of the pants performance is the planet generator (scene or scape as it's called). Do a rendering in F030 mode, then run it on the CT :)

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Re: Falcon 040 Afterburner for sale

Postby Trixster » Tue Aug 01, 2017 7:53 pm

I think it's called Scape. Do you have a link to it, I couldn't find it with a quick google
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Re: Falcon 040 Afterburner for sale

Postby Rustynutt » Tue Aug 01, 2017 9:05 pm

Original work by Scott Anderson, ported to the ST by Robert W. Stiles.
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Re: Falcon 040 Afterburner for sale

Postby Rustynutt » Tue Aug 01, 2017 9:40 pm

For those that haven't been around that long, heres some AB literature. Lot more if you really search.
afterburner-2.jpg
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Re: Falcon 040 Afterburner for sale

Postby Rustynutt » Tue Aug 01, 2017 9:44 pm

Mail from Doug Little back in the day

I take that back! :-D

I just replaced all of the capacitors on the Falcon PSU with low ESR versions and slightly higher values (68uF vs 33uF for the 400V, and 1500uF vs 1000uF for the output filter caps).

The Afterburner is now burning running at 48MHz for the first time and is able to complete a Nembench test... I should probably now look at a PicoPSU to replace it with.

One of the things that I have been wondering about on the Afterburner is the lack of bypass capacitors on the board. I can only see a single SMT ceramic near the cpu. There might be more under the CPU - I don't remember looking when I swapped the chips. But there are 9 big ICs on there and it seems to be relying on ground/power plane capacitance or the Falcon mainboard, and that's on the other side of the expansion port.

Anyway I'm thinking of adding a tantalum & ceramic cap on the underside of the AB at the expansion port where the power comes through, to see if it helps the board at higher frequencies.

I'll also replace the mainboard 4700uF cap while I have access to the board.

Will report back if I find out anything useful.

[UPDATE]

One of the chips on the Afterburner board is 'MC88915 FN 70' which is a PLL / clock doubler intended for driving the PCLK of a 68040 CPU. The '70' signifies a maximum operating frequency of 70MHz (or 35MHz x 2) so it's only just rated for a 32MHz 68040. It probably doesn't cope well as the BCLK approaches 50MHz (PCLK >= 100MHz). I have also noticed this chip gets warm at BCLK == 40MHz. It is probably the limiting factor on the board.


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