Bootleg PCBs v Real?

[kingtreelo]

So i am obviously aware of what the differences are in that one is a copy and one isn't, but is there a list of differences or was it just a free for all with the bootleg PCBs and you could well end up with one with crazy differences in the game at some point

 

[Georgian2]

There are many different bootlegs. Some are 1:1 like the original some are 1:1 but the custom ICs are reproduced on daughter boards. Some are very different. Some run the same game as original some run an completly different code.

 

[sukhbir]

Bootlegs are pretty good compare to the original pcbs only the sound is not perfect,compare to emulation Bootleg pcbs run just like the original.
I find some games on emulation run faster such as trojan and ghost n goblins compared to the original hardware.

 

[TheDaddy]

Mixed bag really, some are 1 to 1 and some boots can be better ! For a few resons. But there again some can be total guff.

Dave.

 

[Lurch666]

Black tiger (black dragon) bootleg has sprite priority issues where the player weapon and the fires that come from the booby trapped chests appear behind the graphics instead of in front.

 

[Retroman839]

Bombjack is good
I have experienced some slowdown on the stages with straight vertical rows of bombs but I don’t have an original to compare it to.

 

[sukhbir]

Black tiger (black dragon) bootleg has sprite priority issues where the player weapon and the fires that come from the booby trapped chests appear behind the graphics instead of in front.

I’ve got a black tiger booty and mine has no sprite issues.

 

[sukhbir]

Bombjack is good

I agree,better than emulation.

 

[Retroman839]

I have 2x punisher bootys

One
I call my good punisher boot

The other I call the bad booty

The pcb looks same
To look at but bad one has some issues intro sequence has off geeen background
And some similar odd graphic anomalies .. I put it down to possible hardware issues used in the manufacture or a faulty ram somewhere .

Irem image fight booty has a
Sound glitch
Sounds like spectrum loading
Quite and only at times but it’s consistent.

 

[Lurch666]

I’ve got a black tiger booty and mine has no sprite issues.

I assume there are variations with boots like Retroman said,some better than others.

Another is moon patrol where the explosion sound is white noise on the boot instead of the sample used in the original.

 

[Retroman839]

Like spectrums fart sounds when lazy coders decode just not to implement sound at all!

 

[John Bennett]

Yeah, it's a mixed-bag. A lot of it depended how hard it was to copy the original.
Things without custom chips (Double Dragon, Bubble Bobble and many older games), you could get a pretty good copy.

When you get to 90's stuff like CPS1, Mortal Kombat, they were doing the video in their own way using masses and masses of GAL chips or even FPGAs/CPLDs. Some stuff you wouldn't notice, others there'd be things different like scrolling effects.
The CPS-dash stuff had an entire extra Q-sound DSP board and I don't think anyone attempted to reverse that, so you had a right mish-mash of attempts - you had The Punisher with Final Fight FM music, some had an attempt at badly sampled music, I think?
The biggest problem I see with the newer stuff it the awful build quality - you can see bodge resistors everywhere, hardly any capacitors, and saying 'there's no custom chips to fail' is misleading as there's tonnes of other stuff you wouldn't fancy replacing. SF2 bootleg was literally a £5 PCB and you'd be mad to pay a load more for one even now.