I've now removed the two upgrade boards, so we have for the first time an unfettered view of the A305 motherboard. The two empty sockets are the VIDC and MEMC chips, which have been replaced by the additional carrier boards. RISC-OS is also on a carrier board, and this machine has RISC-OS 3. It would have originally been supplied with Arthur OS.

Click here to return to my Acorn A305