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Author Topic: My A500 "project" pics, details, build log?  (Read 113169 times)

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Offline AmmoJammoTopic starter

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Re: My A500 "project" pics, details, build log?
« Reply #74 on: July 03, 2012, 05:08:54 AM »
Its yellow instead of grey, I swapped the wire in the loom a while ago when I was trying the separate H and V sync signals..

Found some plugs with 2mm pitch, not the right plugs, and I had to modify two plugs for the one socket...

Made up the loom to connect from the GBS to the VGA input on the monitor... and on to the pics...















Switches need "fine tuning" as they're held in place by a piece of foam wedged between the PSU and switches, which means if they're off centre, or not straight, buttons accidentally get pressed :p
« Last Edit: July 03, 2012, 05:11:41 AM by AmmoJammo »
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Offline djos

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Re: My A500 "project" pics, details, build log?
« Reply #75 on: July 03, 2012, 05:21:15 AM »
Very very nice! :afro:
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Offline AmmoJammoTopic starter

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Re: My A500 "project" pics, details, build log?
« Reply #76 on: July 03, 2012, 05:25:05 AM »
shame I don't have the other cover off the back of the monitor..
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Offline djos

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Re: My A500 "project" pics, details, build log?
« Reply #77 on: July 03, 2012, 05:28:25 AM »
Quote from: AmmoJammo;698810
shame I don't have the other cover off the back of the monitor..
meh, you'll never see it.

btw what is the DIN style connector 2nd from the left?
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Offline AmmoJammoTopic starter

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Re: My A500 "project" pics, details, build log?
« Reply #78 on: July 03, 2012, 05:36:06 AM »
It used to provide the power and switch signal to the power supply for the usb hub. Now that power supply section runs the gbs.
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Offline djos

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Re: My A500 "project" pics, details, build log?
« Reply #79 on: July 03, 2012, 05:41:44 AM »
Quote from: AmmoJammo;698813
It used to provide the power and switch signal to the power supply for the usb hub. Now that power supply section runs the gbs.
Ah I see. :)
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Offline AmmoJammoTopic starter

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Re: My A500 "project" pics, details, build log?
« Reply #80 on: July 04, 2012, 04:44:45 AM »
Found a near new AT power supply... but it looks so cheap... should I bother trying to fit it in the external CD Rom case, or keep looking?

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Offline djos

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Re: My A500 "project" pics, details, build log?
« Reply #81 on: July 04, 2012, 04:54:06 AM »
If it's putting out accurate voltages and appropriate amounts of current why not use it? it wont be working very hard to power a CD-ROM anyway.

The only issues I can see are the height of the Heat Sinks (can be cut down), Transformer & large Caps may prevent the board from fitting under the drive in your enclosure?
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Offline AmmoJammoTopic starter

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Re: My A500 "project" pics, details, build log?
« Reply #82 on: July 04, 2012, 04:56:31 AM »
and a hard drive, and an amiga 500...

it sits behind the drive.
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Offline djos

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Re: My A500 "project" pics, details, build log?
« Reply #83 on: July 04, 2012, 05:03:17 AM »
Quote from: AmmoJammo;698964
and a hard drive, and an amiga 500...

it sits behind the drive.
Lol, yeah that wasnt clear - well if it meets the appropriate standards why not, Miggies will run on a 25watt PSU so even a cheap 250watt PC PSU (assuming it meets proper specs) is overkill imo.
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Offline AmmoJammoTopic starter

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Re: My A500 "project" pics, details, build log?
« Reply #84 on: July 04, 2012, 05:21:05 AM »
it seems this LCD screen was first released in 1999, with a RRP of about $1600!
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Offline djos

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Re: My A500 "project" pics, details, build log?
« Reply #85 on: July 04, 2012, 05:25:11 AM »
Quote from: AmmoJammo;698968
it seems this LCD screen was first released in 1999, with a RRP of about $1600!
Gotta luv the never ending march of technological progress! :D
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Offline AmmoJammoTopic starter

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Re: My A500 "project" pics, details, build log?
« Reply #86 on: July 18, 2012, 05:10:40 AM »
I'm full of MDF dust... :hammer:

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Offline djos

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Re: My A500 "project" pics, details, build log?
« Reply #87 on: July 18, 2012, 05:24:53 AM »
Jeezuz! Is that for your car or are you building an infinite-baffle sub-woofer for your folks house? :D
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Offline AmmoJammoTopic starter

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Re: My A500 "project" pics, details, build log?
« Reply #88 on: July 18, 2012, 05:26:45 AM »
box is still under construction.
I greatly dislike MDF dust...
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Offline AmmoJammoTopic starter

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Re: My A500 "project" pics, details, build log?
« Reply #89 from previous page: July 19, 2012, 01:43:48 PM »
Mega Midget Racer arrived today...



Although I have my doubts as to whether it will actually work (don't have time to test it till the weekend)

few strange things though, the entire boards surface mount components are hand soldered, is this normal?

the memory sockets along the top edge of the board have been cut down from bigger sockets?

also, there's a resistor added to U28?

FPU is currently clocked at 50Mhz, and CPU is 25Mhz ;) can I run the CPU at 33Mhz?



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