speleo_de
Member
Thanks
Thanks for developing this, comes in real handy for testing my newest buy.
Thanks for developing this, comes in real handy for testing my newest buy.
Sea Wolf: Any interest in a custom Sea Wolf test rom?
- Thread starter TheShanMan
- Start date
kitcarted
Member
Anyone every produce this? I'd sure like one for my Sea Wolf!
Ted
Ted
OP
OP
Like I mentioned in post #20, if you don't have a rom burner of your own, just ask Steph at hobbyroms.com to burn one for you. Bear in mind that if your board isn't strapped for 2716 eproms (e.g. it has the original masked roms), you'll need to re-strap your board (alter some soldered jumpers) before you can take advantage of this, and as a result you'll also need to burn the game roms on 2716's.
hatrick
Well-known member
I just wanted to thank TheShanMan for making this test rom. I finally got around to strapping an 8080 board for 2716's so I could use this on my Sea Wolf. Awesome job and it will be a great use for troubleshooting in the future (mine currenty works).
I did also use it on the Sea Wolf for Grinkers Arcade and it identified a bad RAM, so I should be able to get that fixed as soon as we get the RAM chips in.
Thanks!
I did also use it on the Sea Wolf for Grinkers Arcade and it identified a bad RAM, so I should be able to get that fixed as soon as we get the RAM chips in.
Thanks!
Golgotha67
Member
I would be interested in test rom
I am also looking for a high resolution scan or photo so I can recreate the explosion overlay. Mine is missing in my game I acquired over the weekend.
I am also looking for a high resolution scan or photo so I can recreate the explosion overlay. Mine is missing in my game I acquired over the weekend.
doomed
Member
Super, thanks for doing this !
SeaWolf
Active member
No anal probes !
Why do you guys want to test me???
Why do you guys want to test me???
mikemolang
Member
I just ordered one!
Thanks,
Mike
Thanks,
Mike
Just wanted to say THANKS!
This was a big help in ferreting out the last few little problems on a Sea Wolf boardset tonight.
It was strapped for 27S81 mask ROMs - same pinouts as the 27S181 Bipolar PROMs so I h ad to mod the 2716s to fit and program only their lower half.
Pin 21 to +5v, pin 18 and 19 to ground since this was a Rev D board and it used pin 20 on the ROMs for enabling read. (The later revision boards switched to using pin 20)
This was a big help in ferreting out the last few little problems on a Sea Wolf boardset tonight.
It was strapped for 27S81 mask ROMs - same pinouts as the 27S181 Bipolar PROMs so I h ad to mod the 2716s to fit and program only their lower half.
Pin 21 to +5v, pin 18 and 19 to ground since this was a Rev D board and it used pin 20 on the ROMs for enabling read. (The later revision boards switched to using pin 20)
OP
OP
That's awesome! So glad it helped, @channelmanic !
Glad you made it.
Here's a copy of your work plus the 2 split files I made and a slight change in the readme to explain how to modify the 2716 EPROMs like I did in the pic above. That way folks whose boards have the 27S81 Mask ROMs don't have to change strapping and address decoder jumpers to use the test routines you made. I took no credit in the file as all the hard work was yours, not mine.
Thanks again!
Just in case anyone is looking for a cab to test these roms in...
(Not mine)
Barn Find 1976 Midway’s Sea Wolf Arcade Game - video gaming - by...
Here is a Great old Arcade Game from 1976 Midway Sea Wolf. Very popular game so popular they made a Sea Wold II. This has been stored many years and was working when stored as family told me. Am...
annarbor.craigslist.org
advans13
Requested Self-Ban
Nice!
OP
OP
I thought it might be nice to create an adapter board that lets you permanently install the test rom and have a jumper or switch for booting into test mode, using a 2732 instead of 2716.
This has also gotten me thinking about improvements I could make to the test rom. Are there any enhancements people would like to see?
One in particular that I think could be helpful is for the ram test to report results for all ram chips rather than stopping at the first failed chip. I'd also like to add an audio report of failed ram chips since what's displayed on screen is stored in the ram, which means you might not be able to see which chip it's reporting. I have never actually had failed ram chips myself though so I'm thinking about this hypothetically. Any feedback on this idea from people who have tried to use the test rom to diagnose ram errors would be welcome.
I have some other possible enhancements in mind too. No promises on when any of this might be available though... I tend to jump around between projects (arcade and otherwise) depending on whatever interests me on any given week - haha!
This has also gotten me thinking about improvements I could make to the test rom. Are there any enhancements people would like to see?
One in particular that I think could be helpful is for the ram test to report results for all ram chips rather than stopping at the first failed chip. I'd also like to add an audio report of failed ram chips since what's displayed on screen is stored in the ram, which means you might not be able to see which chip it's reporting. I have never actually had failed ram chips myself though so I'm thinking about this hypothetically. Any feedback on this idea from people who have tried to use the test rom to diagnose ram errors would be welcome.
I have some other possible enhancements in mind too. No promises on when any of this might be available though... I tend to jump around between projects (arcade and otherwise) depending on whatever interests me on any given week - haha!
OP
OP
I'm nearing completion of test rom version 3. This version most notably adds bit shifter testing, a crosshatch screen, better ram error reporting, and optional long running ram tests (for discovering a ram chip that's failing intermittently).
Any interest in helping me test it out and provide feedback? Between mame and my real game I've been doing my own testing but getting other eyes on it might be helpful. Ideal testers would be anyone who is currently having ram or bit shifter problems, or anyone who has used the test rom previously to help fix your game. Anyone else willing to burn it and put it through the paces is welcome too, as long as I don't already have enough testers.
Any interest in helping me test it out and provide feedback? Between mame and my real game I've been doing my own testing but getting other eyes on it might be helpful. Ideal testers would be anyone who is currently having ram or bit shifter problems, or anyone who has used the test rom previously to help fix your game. Anyone else willing to burn it and put it through the paces is welcome too, as long as I don't already have enough testers.
andrewb
Well-known member
I have a couple of sets I need to work on. I'll PM you.
keithlee
Active member
Thanks for doing this. I just recently fixed a problem in the shifter circuit on my machine which was quite laborious and a utility to assist troubleshooting would have been most welcome.
OP
OP
@keithlee bummer that I didn't have this ready before you did your repair. Would a simple test looping through various values and shift amounts have been sufficient to help you figure it out (e.g. continuously looping vs a single pass)? If anything beyond that would've been helpful, I'll give it consideration.
Last edited:
keithlee
Active member
I wish I could answer that. I'm not smart enough with solving these logic problems. I just probed every input and output in the circuit until I found an outlier.
OP
OP
Checking again to see if anyone else is up for giving the new test rom a spin.
