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Так я так и ответил. Кстати, на KA2197D (только в PAL) можно вешать кварц (5 и 6 ноги), а вот на KA2198BD (PAL/NTSC) уже не получиться, так как 5 нога внутри кристалла в воздухе.
Now you need to track six pins of the chip: 1, 2, 3, 4, 44, and 46. All these pins should be routed to K1 and K2.Thank you. I have found the relevant pin definitions by measuring with a multimeter, and I will post them later.
First, measure the voltage on all of these pins except 44.The solder blob on K1 is most likely the quartz crystal switch.Nope, the pin is shorted to GND. It would also be a good idea to check the VDP mode and region displayed by the 240p test suite.
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.
