Until I get the time to write a detailed article on the Enterprise 64 here's a video I recorded about the system.
CPU: Zilog Z80A @ 4MHz
Graphics: "Nick" Graphics co-processor.
Display: Max 672 x 512. 256 colours in 180 x 80 pixel mode.
Sound: "Dave" sound co-processor. 4 channels, stereo. 4 voices, 7 octaves with machine code.
Memory: 64k RAM. 48K ROM containing the EXOS operating system and BASIC.
Software Media:Cartridge & Cassette (floppy disk drives were available, if uncommon).
Value: £45 - £270. These are very desirable and quite hard to come by.