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

[djos]

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.

[djos]

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

[djos]

*groans*

[djos]

That is nuts!!

[djos]

They all seem to be windows versions?

EDIT: never mind, I found the "povami" files

[djos]

LOL, you could have an all-in-one ROM for about $23 and keep your originals preserved!

http://www.ebay.com.au/itm/170896365915?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649#ht_754wt_1122

Im prolly gonna grab one of these myself as my current rom switcher is too big and wont let me install my new auto-config 8mb ram board.

[djos]

Id rather keep my original roms intact. :cool:

[djos]

mine's faster than yours (in stock mode):



Interestingly mine is running @ 7.16mhz ?

[djos]

that'd be NTSC.

That was running in PAL mode according to the SysInfo tool - interesting because the Rev6a board im running is from Germany not the USA.

[djos]

lol, how'd you do that?

[djos]

lol, can you post a pic (or details) of your mobo showing the Clock Crystal & Agnus?

Im curious to see what you's looks like as mine has JP4 joined and a 28.375mhz Clock Crystal.

Btw, does your GBS-8200 work with PAL cause if I boot in PAL using the hold-down both mouse buttons method, mine doesnt work properly and I get most of the screen missing.

[djos]

LOL, just before you power up your miggy, hold down both mouse buttons (KS3.1) and the boot menu will appear, go into Display and you can select from either mode - mine seems to default to NTSC atm even tho my research indicates I have the PAL Clock crystal - apparently for PAL it will be 28.37516MHz and NTSC it will be 28.63636 MHz.

[djos]

Interesting, my rev6a came with an 8372a from Germany and jp4 is closed - I might install a switch too.

[djos]

That is weird, my GBS doesn't like pal at all?

I did discover tho that the NTSC output works with my Samsung LCD monitor via miggy-VGA adapter but PAL doesn't. I'm thinking of making a sync stripper for my GBS to see if that fixes my PAL issue.

[djos]

...isn't 8372A the standard PAL A500 chip?

Yep, Standard on rev6a iirc

[djos]

but haven't you changed it to a 8372AB?

I'm not using it ATM as the it needs 2mb chip ram to work and Tomthul is still working out the kinks in my 2mb chip ram trapdoor card.