The product documentation indicates a specification with 48 KB of RAM plus 16 KB of "non volatile CMOS RAM" and 96 KB of ROM, although this particular composition of RAM is apparently contradicted by the RAM devices present on surviving M2105 machines. However, the earlier Chain variant of the board does appear to provide only 16 KB of static RAM using two HM6264LP-15 chips, also providing an extra 16 KB of dynamic RAM using eight MK4516-15 chips, suggesting that the product evolved during development.
The product documentation indicates a specification with 48 KB of RAM plus 16 KB of "non volatile CMOS RAM?" and 96 KB of ROM, although this parti!cular composition of RAM is apparently contradict?ed by the RAM devices present on surviving M2105 machines. However, the earli?er Chain variant of! the board does appear to provide only 16 KB of static RAM using two HM6264LP-15 chips, also providing an extra 16 KB of dynamic RAM using eight MK4516-15 chips, suggesting that the product evolved during development.