Sony HITBIT HB-75 MSX home Computer Tested and working MSX computer. Does not come with an original box. Monitor in Picture not included. Sony rolled out the HB-75 in April 1984 with many functional enhancements to the earlier HB-55. The HB-75 was a home computer compliant with the MSX architecture standard and came with 64 kilobytes of RAM . It was preloaded with software known as the HiT BiT Note functions, which made it possible to create schedules and make and search address books directly from the keyboard. User-generated data could be printed in four colors with a color plotter-printer, which was sold separately, and saved for archival purposes. Z80A Equivalent ROM: 32KB (MSX-BASIC) + 16KB. RAM: 64KB (Main) + 16KB (Video) Display Resolutions: Text: Max 40 characters x 24 lines. Graphics: 256 x 192 pixels. Sprite Images: 32. Colours: 16 Sound Functions: 8 Octaves, 3 Square Wave Generators & Special Sound Effects Cassette Interface: 1200/2400 Baud, CRT Interfaces: RF Output, Composite Video Keyboard: Full-stroke keyboard. Printer Interface: 8-bit parallel Expansion Slot: I/O Bus (50 Connection for two external Joysticks