This reminds me of the Foenix series of computers by Stephany Allaire, the F256K2 which is much like what a Commodore 256/512 might have been like as a successor of the Commodore 128.
They are available in 8, 16, 24 and 32-bit systems with a variety of CPUs such as the 65c02, 6809, 65816, 68000, or 68040.
They are available in 8, 16, 24 and 32-bit systems with a variety of CPUs such as the 65c02, 6809, 65816, 68000, or 68040.
Main website: https://c256foenix.com/
Wiki: https://wiki.c256foenix.com/index.php?title=Main_Page