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Author Topic: My A500 "project" pics, details, build log?  (Read 113086 times)

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Offline AmmoJammoTopic starter

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Re: My A500 "project" pics, details, build log?
« Reply #89 on: 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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Offline djos

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Re: My A500 "project" pics, details, build log?
« Reply #90 on: July 19, 2012, 10:57:32 PM »
Intriguing, oh well plug her in and see what happens! :)
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Offline AmmoJammoTopic starter

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Re: My A500 "project" pics, details, build log?
« Reply #91 on: July 20, 2012, 12:32:29 AM »
it came packed in polystyrene foam and bubble wrap... won't be able to test it till tonight or tomorrow as I have work...

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Foam peanuts and bubble wrap are not acceptable packing materials for a static  sensitive device.

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oh, okay. sorry

*sigh*
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Offline djos

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Re: My A500 "project" pics, details, build log?
« Reply #92 on: July 20, 2012, 12:50:32 AM »
Yeah I've had electronics show up from folk in bubble wrap or aluminium foil - some from the guy's that made them who should know better, FFS Anti-static bags cost next to nothing on FleaBay!
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Offline AmmoJammoTopic starter

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Re: My A500 "project" pics, details, build log?
« Reply #93 on: July 20, 2012, 12:52:33 AM »
aluminium foil is alright, or polystyrene wrapped in foil for ICs ;)
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Offline djos

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Re: My A500 "project" pics, details, build log?
« Reply #94 on: July 20, 2012, 02:04:20 AM »
one item i got was embedded in that nasty crumbly polystyrene surrounded by aluminium foil! :p
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Offline AmmoJammoTopic starter

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Re: My A500 "project" pics, details, build log?
« Reply #95 on: July 20, 2012, 02:09:45 AM »
Kickstart Rom by any chance?
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Offline djos

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Re: My A500 "project" pics, details, build log?
« Reply #96 on: July 20, 2012, 02:12:21 AM »
Quote from: AmmoJammo;700737
Kickstart Rom by any chance?

yep! Burned Rom not original! :rolleyes:
« Last Edit: July 20, 2012, 02:22:35 AM by djos »
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Offline AmmoJammoTopic starter

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Re: My A500 "project" pics, details, build log?
« Reply #97 on: July 20, 2012, 02:12:45 AM »
If the foam is wrapped in foil, then the ic legs are pushed through the foil into the foam, thats fine ;)
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Offline djos

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Re: My A500 "project" pics, details, build log?
« Reply #98 on: July 20, 2012, 02:23:21 AM »
Lets put it this way, the foam was falling apart and it didnt look very professional imo.
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Offline djos

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Re: My A500 "project" pics, details, build log?
« Reply #99 on: July 20, 2012, 06:52:02 AM »
Quote from: AmmoJammo;700660
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?

Stumbled across this 500+ project on AmiBay and The MegaMidget Racer looks pretty much identical to yours with respect to the soldering etc - sockets are all stock tho so Im guessing they ran out of the correct DIPP sockets while making yours and got creative.

You'll be pleased to note the CPU is being run at 40mhz on this version.
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Offline AmmoJammoTopic starter

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Re: My A500 "project" pics, details, build log?
« Reply #100 on: July 21, 2012, 11:58:14 PM »
Quote from: djos;700761

You'll be pleased to note the CPU is being run at 40mhz on this version.

there are different CPUs, ranging from 20Mhz to 50Mhz, but apparently the board will only be stable at up to about 38Mhz, even with the 50Mhz chip... this is based on what I've read, so might be wrong... plus, I don't really retain much information... lol

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Offline djos

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Re: My A500 "project" pics, details, build log?
« Reply #101 on: July 22, 2012, 12:08:48 AM »
Damn dude, that thing is massive! What are you going to put it in?
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Offline AmmoJammoTopic starter

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Re: My A500 "project" pics, details, build log?
« Reply #102 on: July 22, 2012, 12:30:07 AM »
BA Falcon wagon... could have been bigger, but I wanted to keep it below the cargo blind, plus it didn't need to be bigger.

Quote from: djos;700949
Damn dude, that thing is massive! What are you going to put it in?

...that's what she said...
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Offline djos

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Re: My A500 "project" pics, details, build log?
« Reply #103 on: July 22, 2012, 12:33:17 AM »
*groans*
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Offline AmmoJammoTopic starter

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Re: My A500 "project" pics, details, build log?
« Reply #104 from previous page: July 26, 2012, 12:55:16 AM »
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