This is a quite particular MSX 1 computer as it has a tape-recorder built-in (BitCorder)with its own counter, and a kind of joystick screwable in the middle of the cursor keys, a bit like the Spectravideo SV-318.
Apart from that, it seems to be the same machine as the Hit-Bit 75. There is even the same built-in software (Personal Data Bank) composed of an agenda, a memo and an address manager, with which you can save your work with a special RAM cartridge.
The Hit-Bit 501 is the only MSX computer with the Sanyo PHC-30 to have a built-in tape-recorder.
As with all the Hit-Bits exported outside Japan, the last letter of the name indicates the country in which it was meant to be sold : HB-501F for France, HB-501D for Germany, HB-501P for PAL systems, etc...
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Please correct the information about this MSX
1 - in the Keyboard section: It''s HB-501F not HB-75F. 2 - Also Hitachi H2 and Sanyo PHC-34 have built-in tape recorders.
Also add: The A/V output is DIN-6 (non-standard), and it''s carry STEREO audio outputs.