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An Atari ST nerd tries to salvage an Amiga 500. Part 1. 

BW's Technoshed
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What on Earth have I done?
I've only got an bought a dirty, filthy Amiga. Literally dirty and filthy, actually. It's a 'loft find'. How does it look? Can I make it work or has it suffered Vartacite?
Well, to do that I'll need to power it up so the first task (after a good disinfectant bath) will be to build a power lead.
How did things go for this Atari ST nerd entering the dangerous world of Commodore?
/ @thetechnoshed
/ thetechnoshed
PCBWay offer PCB manufacture, CNC machining, sheet metal fabrication, 3D printing and injection moulding: www.pcbway.com
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0:00 Introduction
2:45 RAM expansion Vartacide
7:20 Quick rear port inspection
8:44 PCBWay!
9:25 Opening her up: the keyboard
12:13 Removing the can: motherboard inspection tour
19:07 Making a new power supply cable
23:32 Testing the cable in vitro
32:48 Powering up the Amiga!
35:02 Thou shalt check voltages
35:25 Outro
References:
PiStormST WIP Github: github.com/dh219/pistorm/tree...
GadgetUK164: / gadgetuk164
DFB1: github.com/dh219/DFB

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22 июл 2024

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Комментарии : 15   
@iamdkk
@iamdkk Год назад
Welcome to the Dark Side 💪
@wtfiswiththosehandles
@wtfiswiththosehandles Год назад
Atari ST fan tries to repair an Amiga? Well I never... What's next, Pepsi CEO drinks Coke for lunch?? Cats make friends with dogs?
@ninjaalex-yf5io
@ninjaalex-yf5io Год назад
Amiga forever!
@madigorfkgoogle9349
@madigorfkgoogle9349 Год назад
you can crimp those metal tabs around the cables inside the plug for strain relief...
@GadgetUK164
@GadgetUK164 Год назад
=D LOL @ Slow 7Mhz! The chips next to the RAM are 74 series, for the internal RAM and the expansion - mux and something else I think. The large black slab hybrid next to the video port at the back is the DAC effectively. Referred to as Vidiot I think. The low 5v rail there is the molex connector! ATX PSUs have CRAP connectors!
@thetechnoshed
@thetechnoshed Год назад
Thank you, Gadget. I've not seen a package like that before. Is it like a massive R2R resistor divider or something? Aha, you could be onto something with the connectors. Might have to do some more measurements. I wouldn't necessarily rule out that ATX socket fly lead I'm using having less copper than closed police station, mind.
@RetroAlly
@RetroAlly Год назад
Composite out on the back is indeed monochrome, if you want colour composite as well as RF an A520 modulator is the thing you need, I have a couple (currently untested but i can test) - I can spare one if you want one. And if the floppy drive doesn't work, you can try booting it with an Amiga disk in an Atari ST disk drive, which won't disk detect properly but if you put a disk in, then switch it on, it will usually boot. Also: Liking the keyboard adapter idea!
@algizmo7079
@algizmo7079 27 дней назад
Having, long ago, soldered myself a 13pin DIN for Atari monitor, I felt your pain with the power plug. Still not proud of some joints, what, 34 years on?
@thetechnoshed
@thetechnoshed 14 дней назад
I am *so* terrible at making plugs!
@TPau65
@TPau65 Год назад
At least a sign of life from this Amiga! Quite surprised that the composite out only gives a b/w signal. Always thought it's color. And don't worry, I'm also an Atari "Fanboi" who bought an Amiga (1200 with TF1260 board) this year! 😃
@a1exh
@a1exh Год назад
A500s have no TV encoder on the board and so only have Luma not composite
@TPau65
@TPau65 Год назад
@@a1exh Ah, ok. A bit similar to the ST, where Composite video at the monitor connector is only available with M models, STM, STFM, STE, Falcon. Where the other STs have Composite sync at that pin, iirc!
@thetechnoshed
@thetechnoshed Год назад
It's only because my Archimedes A3000 also has a mono PAL signal too that I wasn't totally baffled!
@doctorsocrates4413
@doctorsocrates4413 6 месяцев назад
Is that metal shield really needed on an A500.?...can it be removed entirely or is it required.
@thetechnoshed
@thetechnoshed 6 месяцев назад
Not really in the current day and age, but no harm to have it if things will still fit with it on.
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