lock-on help

[Former user]

Original issue 336 created by megatuff22 on 2013-05-16T19:33:23.000Z:

when I try to boot sonic 2 knuckles it does not work. it either boots normal sonic 2 or the stand alone sonic & knucles game. I have the sonic and knuckles rom in the lock-on folder and sonic 2 in the rom folder. please help

[Former user]

Comment # 1 originally posted by ekeeke31 on 2013-05-16T19:51:27.000Z:

from the user manual:

"In order to enable Lock-On emulation, you must provide the uncompressed Sonic & Knuckles ROM image (not included) and put it as “sk.bin” in the “/genplus/lock-on/” directory, on your default FAT device. In order to properly run Sonic the Hedgehog 2 with Lock-On technology, you also need to provide the extra chip (UPMEM) ROM image and put it as “sk2chip.bin”, in the same directory."

In short, for Sonic 2 only, you need an extra ROM (which can not run alone and contains some specific data for Sonic 2 Knuckle adaptation) generally referred as Sonic 2K UPMEM ROM.

Also, you do not load the S&K ROM but the ROM that you want to be locked on, S&K ROM (and extra ROM if needed) are automatically loaded providing they are properly named in the proper lock-on directory.

[Former user]

Comment # 2 originally posted by cheatfreak47 on 2013-05-25T03:47:58.000Z:

I know this is invalid, but just In case someone comes looking here, the rom's MD5 is f9d758fe3f12b92074caef54d397d8f1