Chris

Coder, Emu developer, Arcade fixer, Hacker and collector of unfinished projects.

[Chris @Jun0Man]

One of the battery wires was corroded where it enters. Fortunately, the resin melts when heated, and I was able to solder it to the nub of remaining wire.Measuring the resistance between + & - shows a high but measurable amount showing it's actually soldered. It holds the key ok.

[Chris @Jun0Man]

Finally built my FD1089/FD1094 programmer so I can test an idea out. Grabbed my box of maybe "dead" FD1094 and used the verify function. Amazingly,8 out of 12 still verify as having valid security sram, held for nearly 40 years.Except for my "good" Golden Axe cpu with a bad byte.

[Chris @Jun0Man]

@RepArcade What varnish do you use?

[Chris @Jun0Man]

@MuseumCommodore The game I always go back to is Fort Apocalypse. Not massive but fun to play for 10 minutes. Plexor lives here!!!

[Chris @Jun0Man]

@commodorec64 Great for coding as you don't need to remember the parameter passing registers but a nightmare to reverse engineer (I'm looking at you 8 bit encrypted Capcom and Sega arcade games)

[Chris @Jun0Man]

@wickerwaka Maybe they needed the extra speed. More likely it was an easy way to add protection with their existing tools.

[Chris @Jun0Man]

@paulhamx Take care of yourself and family. You guys got hit hard by Gabriel. We didn't get hit bad in Hamilton although the stream running through my property was the highest I've seen it.

[Chris @Jun0Man]

@TheMikeDX Love the flick animation just like the (retro) real thing

[Chris @Jun0Man]

@CorradoTomasel1 Actually it looks like just the second line in every chip marking was scratched

[Chris @Jun0Man]

IREM used 'security by obscurity' on Moon Patrol except the Dremel erased the wrong text. A 74ls275 Wallace Tree multiplier which unfortunately had the same IO pins as a 512x4 bprom making duplicating the function easy for bootleggers. http:/en.wikipedia.org/Wallace_tree

[Chris @Jun0Man]

@CorradoTomasel1 I would think the low paid workers who manufactured the pcbs in Japan didn't read English so just scratched a random part of the TTL

[Chris @Jun0Man]

@topapate I think bipolar proms were considerably more expensive in 1976. You can parallel them to do 64x64 bit multiplies according to the datasheet https://t.co/J6cQtrxN91

[Chris @Jun0Man]

@MartinPiper Saving that image as its handy when you can't remember what the acronyms look like (and haven't acquired a pcb ruler yet. Lol)

[Chris @Jun0Man]

Original IREM Moon Patrol had a glitch on the middle scroll layer.Changed 2 74ls283@4f&4h which improved it.Touching pin 1 of 4h made the glitch change.C68 is missing from Irem boards & manually added by Williams.Probably due to diffrnt 2732a timing. It should be across 1 and 14

[Chris @Jun0Man]

@_ShootTheCore @_atrac17 @wickerwaka @topapate That is such a great idea for powering a logic probe.

[Chris @Jun0Man]

Fujitsu sux. Repair bootleg moon patrol pcb by replacing bad Fujitsu chips. Take video of it working. Leave burning in for 2 hours. Loose sprite and middle parallax layer. Replace more Fujitsu. Rinse and repeat. Or just shotgun all the Fujitsu chips with the same date codes?

[Chris @Jun0Man]

@CodingAndThings Don't forget the recent weird sheet lightning storms and hail in what is considered summer. WTF is going on.

[Chris @Jun0Man]

RIP Archer Maclean. Such an interesting dude and a fellow arcade lover and fixer. Its a shame our paths didn't cross more often.
I'll have a play of Dropzone and IK+ to remember him.

[Chris @Jun0Man]

@csonesz003 No, I never found a wiring diagram. It would be a massive help if you found a manual

[Chris @Jun0Man]

Operation Tiger by Taito. Just need a wiring diagram to see if it works (or figure it out)

[Chris @Jun0Man]

@_ShootTheCore Make sure you have the correct conversion romset (see post #27 here https://t.co/I8rohwhigS ). I've done the conversion and I didn't need any wire mods