|
CAPS0ff: Decap #139 replacement: Mortal Kombat 4 U76
#365607 - 05/01/17 08:25 PM
|
|
|
|
gregf |
Ramtek's Trivia promoter
|
|
|
Reged: 09/21/03
|
Posts: 8583
|
Loc: southern CA, US
|
|
Send PM
|
|
|
Re: CAPS0ff: Decap #139 replacement: Mortal Kombat 4 U76
[Re: RdW]
#365621 - 05/02/17 10:19 PM
|
|
|
http://caps0ff.blogspot.de/2017/05/decap-139-replacement-mortal-kombat-4.html
>They used a Mortal Kombat 4 U76 PIC16C57 as a replacement for #139 Invasion U76
Any progress towards getting pcbs fully preserved (still be repairable in future years) and the Midway Zeus hardware titles eventually emulated is a good thing. Odd that the mcu was documented in only one of the games and left off the others at this time....assuming the remaining (not mentioned) games from Zeus hardware also use that chip.
- src/mame/drivers/midzeus.cpp
Mortal Kombat 4
Midway Invasion - The Abductors (version 5.0)
/* PIC16c57 Code */ -
|
|
|
|
Re: CAPS0ff: Decap #139 replacement: Mortal Kombat 4 U76
[Re: RdW]
#365668 - 05/04/17 02:13 AM
|
|
|
> http://caps0ff.blogspot.de/2017/05/decap-139-replacement-mortal-kombat-4.html > > They used a Mortal Kombat 4 U76 PIC16C57 as a replacement for #139 Invasion U76
In terms of emulation, what does this do for that particular game?
|
"Note to Noobs:
We are glad to help you but simply posting that something does not work is not going to lead to you getting help. The more information you can supply defining your problem, the less likely it will be that you will get smart-alec replies.
C.D.~"
|
|
|
Re: CAPS0ff: Decap #139 replacement: Mortal Kombat 4 U76
[Re: Master O]
#365683 - 05/04/17 01:32 PM
|
|
|
> > http://caps0ff.blogspot.de/2017/05/decap-139-replacement-mortal-kombat-4.html > > > > They used a Mortal Kombat 4 U76 PIC16C57 as a replacement for #139 Invasion U76 > > In terms of emulation, what does this do for that particular game?
it will make the emulation slower.
really, these midway chips don't do much apart from provide a serial number for security and maybe on the later ones manage the backup ram, all of which is currently simulated, but if the PIC gets emulated that's another entire CPU that needs to run in the emulated environment.
they're not really protection as such, although on real hardware they did do enough to prevent romswaps, so they're most useful to owners of the pcbs where the chips have failed, in terms of emulation they're just there for completeness.
|
|
|