Hi, I posted details in your other thread. Hope it is helpful.

A quick summary. You will need 4MB ram minimum for WHDLoad to run properly. The A600 comes with 1MB chip ram and you can add a further 1MB chip ram to the trapdoor expansion under the A600. you can then add fast ram for the additional ram needed using either an SRAM PCMCIA ram card or an internal fast ram expansion.