TL-ROM Splatterhouse

A place that you can discuss reproduction of classic titles or "licensed-for-reproduction" homebrew for personal use.

Moderators: B00daW, Moderators

Forum rules
1. NO BLATANT PIRACY. This includes reproducing homebrew less than 10 years old, with the exception of free software.
2. No advertising your reproductions, with the exception of free software.
3. Be nice. See RFC 1855 if you aren't sure what this means.
Izen6
Posts: 53
Joined: Mon Jan 28, 2019 9:53 pm

TL-ROM Splatterhouse

Post by Izen6 » Thu Mar 12, 2020 7:41 pm

Hi everybody,

I just made a Splatterhouse repro for myself and it seemed to be fine until I got to stage 2. When I get to a part of the level (after going through the first door and seeing the spiders) I don’t see the platforms that are supposed to be there. If I jump the screen mostly goes black except for the characters essentially making the game unplayable. I used a TL-ROM board with 27C020 chips for the PRG and CHR. Everything is soldered and wired correctly. Would this be a CHR or PRG issue or something else? Thanks!

lidnariq
Posts: 9697
Joined: Sun Apr 13, 2008 11:12 am
Location: Seattle

Re: TL-ROM Splatterhouse

Post by lidnariq » Thu Mar 12, 2020 9:14 pm

Almost always, wiring the CHR wrong will only cause visual effects, not program errors.

Izen6
Posts: 53
Joined: Mon Jan 28, 2019 9:53 pm

Re: TL-ROM Splatterhouse

Post by Izen6 » Fri Mar 13, 2020 3:50 am

I believe it is wired correctly. This is the guide I followed and has worked before.

Bend up pins 1, 2, 24, 30, and 31
Connect pin 1 to hole 30
Connect pin 2 to hole 24
Connect pin 24 to pin 16
Connect pin 30 to hole 1
Leave pin 31 disconnected

Bend up pins 1, 2, 22, 24, 30, and 31
Connect pin 1 to hole 30
Connect pin 2 to hole 24
Connect pin 22 to hole 31
Connect pin 24 to hole 2
Connect pin 30 to hole 1
Leave pin 31 disconnected

You're saying maybe a PRG issue?

Ice Man
Posts: 546
Joined: Fri Jul 04, 2014 2:34 pm

Re: TL-ROM Splatterhouse

Post by Ice Man » Fri Mar 13, 2020 4:51 am

You haven't fixed the other cart and keep making others and produce the same mistake over and over.

Please check the datasheets of the EPROMs and wire pin 1 and 31 accordingly.

User avatar
getafixx
Posts: 370
Joined: Tue Dec 04, 2012 3:28 pm
Location: Canada

Re: TL-ROM Splatterhouse

Post by getafixx » Fri Mar 13, 2020 8:28 am

The MMC3 hack of Splatterhouse uses W-RAM doesn't it? In which case you need a TSROM donor, not TLROM.

Izen6
Posts: 53
Joined: Mon Jan 28, 2019 9:53 pm

Re: TL-ROM Splatterhouse

Post by Izen6 » Fri Mar 13, 2020 8:58 am

According to Famirom it does not use W-RAM. Looking it up, TLROM should work with this. I'm going to try rewiring. I found another wiring guide for TLROM with 27C020 eproms, so hopefully that will do the trick. I've made several TLROM games before and this is the first one that has given me trouble. Have done the same wiring as I usually do. I'm thinking even though the eprom verified, maybe something went wrong with it.

FrankWDoom
Posts: 241
Joined: Mon Jan 23, 2012 11:27 pm

Re: TL-ROM Splatterhouse

Post by FrankWDoom » Fri Mar 13, 2020 9:39 am

If it's the motzilla patch he says tlrom (it probably is). He also says there's a bug with the 1.2 patch so be aware of that.

Assuming prg is 128 or 256, pin 1 is usually left up unconnected, pin 31 s/b left down. If that doesn't work pin 1 should be fixed hi or low I never remember which.

Izen6
Posts: 53
Joined: Mon Jan 28, 2019 9:53 pm

Re: TL-ROM Splatterhouse

Post by Izen6 » Fri Mar 13, 2020 11:00 am

Thanks for the info! I downloaded the ROM a while back and it was already in English, but I assume it is Motzilla's. I have it on an INL flash cartridge, but would like to transfer it to an original. Would the English patch possibly mess something up? It does work perfectly fine on the flash cart.

Sorry, but can you please clarify what you mean by s/b? I'm a little but of a noob when it comes to some of these terms. Thanks!

FrankWDoom
Posts: 241
Joined: Mon Jan 23, 2012 11:27 pm

Re: TL-ROM Splatterhouse

Post by FrankWDoom » Fri Mar 13, 2020 11:08 am

"should be"

Typing on phone so I'm cheating

If it runs on flash cart it should run on a donor, just a matter of wiring it up right

Ice Man
Posts: 546
Joined: Fri Jul 04, 2014 2:34 pm

Re: TL-ROM Splatterhouse

Post by Ice Man » Fri Mar 13, 2020 11:11 am

Like I said before, check your wiring and read the datasheets of the EPROMs.
VPP (Pin 1) is most likely to be connected to VCC and PGM (Pin 31) to be VCC or GND as well.

If that doesn't work keep checking your soldering for shorts and the like as well as use a multimeter to check if traces are good, etc.

Since it works on a flash cart and you're using the exact same ROM, it's not a problem of the game but your work.

Izen6
Posts: 53
Joined: Mon Jan 28, 2019 9:53 pm

Re: TL-ROM Splatterhouse

Post by Izen6 » Fri Mar 13, 2020 6:20 pm

So I've tried and still the same. So pin 31 should not be lifted and I should try soldering a wire from that to VCC or GND? I have 31 lifted because the guides I've seen have it lifted.

FrankWDoom
Posts: 241
Joined: Mon Jan 23, 2012 11:27 pm

Re: TL-ROM Splatterhouse

Post by FrankWDoom » Fri Mar 13, 2020 9:23 pm

31 should be GND so pin 32 is closest. holes 31 and 32 are usually bridged on the board so you leave it down.

most chips it won't matter but some will not go into read mode if it's floating.

post some pics of your wiring if you're having trouble

Izen6
Posts: 53
Joined: Mon Jan 28, 2019 9:53 pm

Re: TL-ROM Splatterhouse

Post by Izen6 » Fri Mar 13, 2020 10:02 pm

This is what I have now.
Attachments
15841621229103882498103729788415.jpg
15841621044154656134560903537645.jpg
15841620815541831081527004736032.jpg

FrankWDoom
Posts: 241
Joined: Mon Jan 23, 2012 11:27 pm

Re: TL-ROM Splatterhouse

Post by FrankWDoom » Sat Mar 14, 2020 12:31 am

sorry i messed up my labels on the last post, pin 31 should go to pin 32 vcc not GND. might be better to start with a fresh eprom and do this:

pin 1 up
pin 2 -> hole 24
pin 24 -> pin 16

this is a 128K prg rom so that's all you should need, everything else is fine where it is.

if that still fails, then try pin 1 to pin 32 or pin 16.

if neither of those works then i have no idea.

edit: are you using an eprom bigger than the bin file? are you choosing the correct output option on famirom?

Izen6
Posts: 53
Joined: Mon Jan 28, 2019 9:53 pm

Re: TL-ROM Splatterhouse

Post by Izen6 » Sat Mar 14, 2020 5:49 am

At this point I'm tempted to use another eprom. Both chips are 27c020's. I made sure to split the ROM as 256kb for both eproms.

So should I still lift the usual pins for PRG (1, 2, 24, 30 and 31)?

Post Reply