Sharp PC-1261 with faulty RAM

[robve]

(09-25-2023 06:08 PM)Didier Lachieze Wrote:  This is not the RAM chip, this is the ROM. The RAM is composed of 5 chips integrated in the Chip On Substrate (COS) black package on the top of the board: ...

Thanks for the info! It won't be possible to replace the RAM then.

(09-25-2023 06:08 PM)Didier Lachieze Wrote:  Reference: http://www.silicium.org/forum/viewtopic....46&t=48635

Strange why Sharp also put the ROM on a separate removable PCB. So the ROMs of the PC-1260 and PC-1261 may also be different? Not only the RAM? The PC-1260 and 1261 are supposedly identical except for RAM size. Other Sharp and Casio systems check for RAM size (making some of them upgradable), but perhaps the PC-1260/1 do not.

- Rob