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Super Monaco GP Airdrive

Gamesmonkey said:
I found the little red caps on aliexpress.
Sorry don't know how to do a link on the aliexpress app.
Click to expand...
looks like these https://fr.aliexpress.com/item/1005001980361579.html

0.03$ and 9.22$ of shipping.
Nice.

so it is that one that leaked?

thanks!

edit: having fixed a Moonwalker recently with this ... moonwalker parts board, I checked to see if by any chance these caps would be in there as well ... and bingo, they are everywhere!
IMG_5595.jpg
 
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update:
removed affected components
IMG_5604.jpg


One of the F245 had broken legs ( can you guess which one?) so digikey to the rescue.

Another melted leg that I could do nothing to save but the parts board has 2 of these left on it!
IMG_5603.PNG


and checking again around, I see that these "caps" are tiny timebombs everywhere :( ( yeah I'll change and clean that one too)
IMG_5608.jpg
 
Hi,
I striped out 95% of all of those little red caps and a load of resistors that looked bad as well.
Did you order any from aliexpress?

Cheers Justin
 
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digikey order showed up ... and that LED on my spare parts board caught my eyes again

IMG_5651.jpg



X/ "that's no moon, it's a space station!"
IMG_5652.jpg
 
How's everyone getting along with repairs? I plan to get my cabinet back together over the Easter break. I've not looked at my original board again since Christmas :( Kinda given up on it TBH....
 
I got interrupted by my egret 29 ... which is almost done so I will also go back to this during Easter!
 
Well after all the work I put into my Thunder Blade I currently have sync and a black screen. So I'm thinking the video dac or video ram.
I have a replacement video DAC thanks to Caius.
 
Unfortunately I didn't have time for my project in the meantime.
I am looking forward to continuing again :)
 
- installed sockets and others
IMG_6387.jpg


IMG_6388.jpg


power on and ...


IMG_6389.jpg



set dip B to what was on working After burner (2 + 6 ON) and

IMG_6390.jpg

IMG_6391.jpg



but no more then that.
guess I'll see if the MEM test roms can run and help
 
Mrhide said:
so using 27c1001 instead of 27c1000 ( or 27c301 ) doesn't appear to work. @twistedsymphony should they be? what am I doing wrong?
Click to expand...
this is a 17 page thread that I'm seeing for the first time so I'm missing some context here.

but looking at the MAME driver for Super Monaco GP they're noted as "27c1000" I'm also seeing that Afterburner has a different graphics PAL at IC127 than SMGP

one way you can tell the difference between the ROMs is to probe around Pin 2 and Pin 24 from socket to socket.
this is 32bit so the output enable (OE) will be tied together in groups of 4 but the A16 address should be tied across all of the chips
if they're 27c1000 then pin 24 will be A16 and pin 2 will be OE, and if they're 27c1001 then it will be the opposite.
 
These boards eh?! I still haven't got around to finishing mine, the board etc was all working, by the time I get back to it something will have broken again!
 
update: Test roms received from Steph @ hobbyroms since I didn't have these oddballs roms ...
and the results are in
IMG_6487-1.jpg


IC61, 22 and 23 are 3 times "TMM2063AP-12"
and the PAL MSB is IC75, so a TC51832SPL-10

My parts moonwalker board has the TC51832SPL-10 (actually -12) and one TMM2063AP-12 ...
Will change them and rerun the test and report back.
 
I've found with 32-bit boards you really want -10 or faster EPROM. I ran into issues with Jaleco Mega System 32 conversions not working when using -12 EPROMs
 
oh, misunderstood, always worth socketing replacements so you're not overcooking the PCB.
 
The pulled TMM2063AP-12 changed nothing... so I guess it was also bad or I screwed up somewhere.
...more ic ordered
 
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ordered TMM2063AP-12 and socketed ic 22 and 23 to be ready

redid the test and
IMG_6541.jpg



of course. the 2 other TMM2063AP-12 are complaining now :(

Code: 
 2EC000-2EDFFF : Road RAM (4K accessible of 8K total) (IC39,38)
    { "ROAD LSB0 ", 0x2EC000, 2, 0x1000 },
    { "ROAD MSB0 ", 0x2EC001, 2, 0x1000, SwapRoad },
    { "ROAD LSB1 ", 0x2EC000, 2, 0x1000 },
    { "ROAD MSB1 ", 0x2EC001, 2, 0x1000, SwapRoad },
 
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