RAM
From veswiki
RAM is an acronym for Random Access Memory, memory which can be read from and written to at any time. The Channel F has 64 scratch-pad registers which can be written and read like RAM through the ISAR and register opcodes, and 128x64 bytes of VRAM that stores the on-screen image by outputting through the ports. In the Channel F the VRAM is not hooked up to be read back and the left over space can't be used for temporary storage.