My A500 "project" pics, details, build log?

[AmmoJammo]

I'm full of MDF dust... :hammer:

[AmmoJammo]

box is still under construction.
I greatly dislike MDF dust...

[AmmoJammo]

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?

[AmmoJammo]

it came packed in polystyrene foam and bubble wrap... won't be able to test it till tonight or tomorrow as I have work...

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

oh, okay. sorry

*sigh*

[AmmoJammo]

aluminium foil is alright, or polystyrene wrapped in foil for ICs

[AmmoJammo]

Kickstart Rom by any chance?

[AmmoJammo]

If the foam is wrapped in foil, then the ic legs are pushed through the foil into the foam, thats fine

[AmmoJammo]

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

[AmmoJammo]

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.

Damn dude, that thing is massive! What are you going to put it in?

...that's what she said...

[AmmoJammo]

[AmmoJammo]

I dunno what this means, but it sure makes the performance look better :p

[AmmoJammo]

Thinking about adding two switches to my A500 so I can run games from floppy without any compatibility issues

Kickstart 1.3/3.1 switch
CPU 68000/68030 switch

But then I realised I modified my motherboard so the 512k trapdoor ram appears as chip ram? will this be an issue for games that need 1meg ram?

[AmmoJammo]

btw, seeing I hadn't posted this here yet.. :p

[AmmoJammo]

Have you tried running something that pushes it's hardware a bit?

got any suggestions? :p

[AmmoJammo]

Rom switcher....
confused? of course you are... :p

its the 3.1 rom soldered directly ontop of the 1.3 rom, with chip select (pin 10) tied to +5volt (pin 21) via 5.6k resistors, and then switched to ground (pin 30?) to enable each rom.

the black socket will have the switch connected, currently just bridged with some wire for testing

[AmmoJammo]

$25... $0... $25... $0...

plus, the height of the two rom chips stacked nicely supports the accelerator board.