Recent content by DWJ

Flat washer and spring. For example, https://arcarc.xmission.com/PDF_Arcade_Manuals_and_Schematics/After%20Burner%20Owner%27s%20Manual%20(420-5798-0).pdf (on page 9) talks about M4 x 16 w/flat washer and spring washer, as well as M4 x 6 w/flat washer [and presumably no spring washer] when...

It is possible that the wiring itself is frayed and/or intermittent. The shake motor was enough to crack the steel housings over time. After rebuilding my panel and using new pots, I found myself spending the better part of an afternoon tracing down what was ultimately a broken wire to the...

It's a weird constellation of symptoms. I've played the game with a confused laserdisc player and if all else is well, the game should be playable (in that the player can aim and shoot at invisible enemy planes, and those invisible planes will shoot bullets at the player from wherever they're...

Your 4-board stack looks like the same hardware as Stern's Astro Invaders. Observe the row of pots (7 pots, a space, and an 8th pot) on the top board, and the two 40-pin DIPs on the other side. Source: another KLOVer at https://forums.arcade-museum.com/showthread.php?t=444139 I'm pretty sure...

Every 256th count is confused... if it's not in the analog section, check the 74LS191 chips in row 9 (depending on board revision?) that turn DVY0-9 into UNMDACY0 through 9. Might not hurt to do the same for Y axis. Basically, start at the analog section, and work backwards through the 374s that...

100 degree TV tubes? Do you remember the make/manufacturer of the TVs? (I've got most of a 6100 chassis, minus the tube. I also keep my eyes out for 19" TVs that can be used for raster parts, but if can find a TV with a 100-degree tube, that'd be a huge win.)

If the machine driving it is old enough, you shouldn't have to do anything special to get it to work. I vaguely recall having minor issues with a programmer that required an ISA card (but don't remember if it was the Allmax or another programmer of similar vintage) though. I think I had to...

I haven't thought about Sega vector stuff for a very long time - did anyone ever figure out how to drive a WG6100 with signals meant for a G08? Or are the reliability fixes for the G08 sufficiently solid that such a machine could safely be run (possibly unattended) for 8 hours a day for a few...

Got any pictures of the board and/or wiring? I enjoy the game and have a Pulsar board, but it's not the sort of thing that would plug into a Frogger without building half a wiring harness as an adaptor. (Which is what I did to get it running in my JAMMA test rig.)

Re: BP-1 stuff: Yeah, I'm pretty sure that some of the cards were compatible with more than one unit, so I'm just hanging onto the units until I find a unit with a card. Thanks for the Shooter stuff - exactly what I was looking for. Trivial to build, but difficult to reverse-engineer from...

While we're at it, how about Atari logo molded (Gauntlet-style) sticks? Mine are in a box at the moment...

Side hobby of mine is tinkering with old EPROM burners. I've got a couple of BP EPR-xx units (they even made a -16!) picked up from surplus stores over the years, but I don't have the ISA card that shipped with 'em. Were/are some of these units controllable by a serial or parallel cable? (old...

Unlike the JAMMA standard, or even Williams games of the era, in which both P1 and P2 had their own sets of controls, Asteroids has only one set of control panel inputs. In a cocktail cabinet, it needs a way of shutting off each control panel in turn. In Asteroids, check the wiring...

Talk about great timing. I've thought about bringing AfterBurner to the company arcade some time this year (after I finish refurbing the control panel), and this was always in my mind as a potential dealbreaker... well, until today. Thanks for this!

Swap X and Y outputs, adjust pots on board to shrink the image down to fit on a horizontally-mounted monitor. Back in my old multigame cabinet (nothing fancy, just brute-force swapping of harnesses via long adaptors to the bank of boards), both Tempest and Quantum worked just fine. With...