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4 поколение / Re: How can I change the system of a 20-year-old cloned Sega MD2 to PAL60?
« : Сегодня в 14:16:53 »Hi, dudeI tried disconnecting the solder joint, but the machine won't start. I will continue to try using a multimeter to find the switching point. Thank you for your reply.
First of all, you need to check that topic:
https://www.emu-land.net/forum/index.php/topic,79285.0.html
Here you can find tables with information about your chip and jumper configuration. Logical "0" means that chip pin connected to the ground, while "1" means connection with +5V (or disconnected both from ground and power supply).
Depending on what generator you have on board (17,734 MHz or 14,302 MHz) choose the required format (column of the first table). For example, for PAL60 with 17,734MHz generator you should only disconnect the 4th pin of SM801 from the ground (see the illustration below for correct counting and compare it with actual position of your chip on the board - in your case you should count the required pin from the upper right corner). The should be associated jumper - please try to find it with multimeter.
Upd: There'se a drop of solder between memory chip and other details on the right side of the board - maybe that's the jumper you need, so you can try to unsolder it.
