Not sure what you are asking. The z8Enore has DMA, but I'm pretty sure it's not the same as what you are asking about. Do you mean externally addressable RAM?
I am a novice in this area, may I know what is a z8Enore? To clarify, what I need is to connect a microchip microcontroller PIC18f series to a DMA controller to access a RAM memory. The PIC I am using does not have a DMA controller. Using the controller, I like to send data to a usb node controller without using the PIC instruction cycles.