this is my BBC Micro connected to a 5 1⁄4-inch Floopy drive unit and a printer
floppy disk 5+1⁄4-inch
Acorn MOS
2 MHz MOS Technology 6502/6512
32K (Model B)
PAL/NTSC, UHF/composite/TTL RGB
640×256, max. 8 colours (Motorola 6845, various framebuffer modes)
78×75, 8 colours (Mullard SAA5050 Teletext chip)
Texas Instruments SN76489, 4 channels, mono
TMS5220 speech synthesiser with phrase ROM (optional)
Printer parallel, RS-423 serial, user parallel, Econet (optional), 1 MHz bus, Tube second processor interface
50 W