This mini forum is intended to provide a simple means of discussion about the Sony  Hit-Bit 20 videogame system. If you want to share your own experience or memories, or add relevant information about this system: post a message!

Hello Olivier,

As far as I know the rear ports and the color of many keys are the difference between HB20P and HB10P.

The HB20P has a din (RGB?) port which is not present in the HB10P, but it has a separated yellow, red and white RCA''s which are missing in the HB20P. This what I can remember, but I can be wrong.

http://www.youtube.com/watch?v$zsjTpFR0oYQ

please help we have zx spectrum 48k and one 128k program running at 6mhz using external ram and snapper discs from velesoft site

I made my first BASIC programs with this computer in the later 80''s
I still have it somewhere at home. I first begun with BASIC but changed to assembly quikly so I explored the inner parts of the hardware.
The Sony msx HB20P had 64k mapped RAM memory in to banks of 32k one of them started at 4000x0 (hexadecimal address) and could be swaped by software with the ROM memory , that holded the OS. So one could easely made changes to the operating sistem , what I used and liked to do !

I played lot of time with the hit-bit 10 computer, it was my first computer and passed hours and hours.
About the question of the difference between models, it can be that one of it has the function keys in colors (Blue) and stop/pause was red coloured. it was sold in spain

I passed my chilhood with one of those 20p and i'm pretty sure the ram is only of 32Kb the sticker near the cartridge slot is also translated to spanish like the hb-10 also mine computer got other variety of arrow keys in dark grey instead of ivory.
Also i haved a data-corder made for math the style of the 20 p (also sony, in the same colors and with rounded shape.)