Question about bankswitching conversions...

[PacManPlus]

Hi:

 

Was a bankswitch conversion (to F8) ever done for Looping and/or Sky Patrol? I did a search but it either returns nothing, or too many pages to sift through

 

Thanks

Bob

Edited June 15, 2006 by PacManPlus

[Lord Helmet]

Hi:

 

Was a bankswitch conversion (to F8) ever done for Looping and/or Sky Patrol? I did a search but it either returns nothing, or too many pages to sift through

 

Thanks

Bob

 

I was looking for looping the other day as well. We need a section on bankswiched conversions for the Kroko cart. There are several threads, but it's kind of confusing going through all of them.

 

Maybe I'm just lazy

 

[PacManPlus]

I went through all of the 'Bankswitching' threads (or at least I think it was all of them). They were most (if not all) about Parker Brothers games.

[+batari]

Hi:

 

Was a bankswitch conversion (to F8) ever done for Looping and/or Sky Patrol? I did a search but it either returns nothing, or too many pages to sift through

 

Thanks

Bob

Those are already F8. No conversion is necessary.

[PacManPlus]

Really? That's odd... I've tried numerous times to put both of them on eprom and they won't run.

Any other eprom I've made has worked, which is why I thought the bankswitching scheme was different here...

 

 

Thank you very much for the response

Edited June 15, 2006 by PacManPlus

[CPUWIZ]

Sky Patrol doesn't work with the AA boards, but it used to a long time ago, haven't tried Looping yet.

[Thomas Jentzsch]

Sky Patrol doesn't work with the AA boards, but it used to a long time ago, haven't tried Looping yet.

Did I get you right? With older boards it worked, with the current ones it doesn't?

 

Sounds like a bug in the code to me (maybe similar to the problems with Reindeer Rescue).

[CPUWIZ]

Sky Patrol doesn't work with the AA boards, but it used to a long time ago, haven't tried Looping yet.

Did I get you right? With older boards it worked, with the current ones it doesn't?

 

Yes.

[+Mitch]

There are two different dumps for both of these games, a normal one and one where the banks are reversed. I'm guessing the dumps with the reversed banks are the ones you can't burn to EPROM.

 

Mitch

[CPUWIZ]

There are two different dumps for both of these games, a normal one and one where the banks are reversed. I'm guessing the dumps with the reversed banks are the ones you can't burn to EPROM.

 

Mitch

 

I only have one binary for Sky Patrol and was able to make a couple carts ages ago, then suddenly it stopped working, hence I blame it on the boards (or PLD). I'll try it with my own later tonight.

[+batari]

Sky Patrol doesn't work with the AA boards, but it used to a long time ago, haven't tried Looping yet.

Did I get you right? With older boards it worked, with the current ones it doesn't?

 

Sounds like a bug in the code to me (maybe similar to the problems with Reindeer Rescue).

I see some bad code in bank 0:

FFF0:  LDA $0FF9
FFF3:  JMP $FFF0
FFF6:  BRK
FFF8:  BRK
FFF9:  BRK
FFFA:  .word $1FF0
FFFC:  .word $1FF0
FFFE:  .word $1FF0

If it starts in bank 0, the game will not run! Simply changing FFF0 to LDA $1FF9 should fix the problem. Here's a hacked ROM.

sky_patrol_fix.bin

[PacManPlus]

That worked! Thanks!

 

I have confirmed that Looping doesn't work as an eprom. I've even tried reversing the banks, and although that way I now at least get a title screen for a microsecond, it still doesn't work.

Edited June 16, 2006 by PacManPlus

[+Mitch]

My bad, I just checked the CC2ROMDB and they are both listed as F8BANK1 not reversed banks.

It looks like batari found the fix for the problem, I would guess Looping needs the same fix.

 

Mitch

[+batari]

My bad, I just checked the CC2ROMDB and they are both listed as F8BANK1 not reversed banks.

It looks like batari found the fix for the problem, I would guess Looping needs the same fix.

 

Mitch

I couldn't find anything wrong with Looping. I'll post my copy in case there's a bad dump out there or something.

Looping.BIN

[PacManPlus]

Hi:

 

Ok, I think I figured out the issue with Looping.

 

I tried Batari's bin in the post just above this one, and it still didn't work. However I did notice that I've been using the same type of eprom the whole time (I don't know the manufacturer, but their logo is two squiggly lines, kind of like the mathematical symbol for 'approximately equal to'). So I tried another manufacturer - AMD, and it worked! Maybe it's a speed issue?

 

Bob

[PacManPlus]

Thanks for he help guys

[A.J. Franzman]

I did notice that I've been using the same type of eprom the whole time (I don't know the manufacturer, but their logo is two squiggly lines, kind of like the mathematical symbol for 'approximately equal to').

Sounds like one of the National Semiconductor logos.

 

There are several websites online with collections of IC maker logos (typically presented in alphabetical order, which doesn't do much good for those that don't look like a letter, or look like the wrong letter).