Bypass hitbit menu - SD mapper on Sony hb-55p

Por melliug

Resident (38)

Imagen del melliug

04-04-2022, 09:55

Hi everyone,
Recently I found my old msx Sony hb55p, I repaired it and now it works fine...but ,how can I run my SD mapper on it? I think the problem is the hitbit menu on boot, but I'm not sure. RAM memory available on this model is 16kb. I have a Sony 64kb cartridge too .Can you help me with this?
Thanks in advance!

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Por Wierzbowsky

Guardian (3648)

Imagen del Wierzbowsky

04-04-2022, 14:59

You need to change the ROM to the one that doesn't have the firmware. Or patch the firmware to disable its startring on boot.

Por gdx

Enlighted (6429)

Imagen del gdx

04-04-2022, 15:43

Por melliug

Resident (38)

Imagen del melliug

04-04-2022, 16:34

I've read your links, thanks! I see the patch is for hb201p. Is there anyway to disable the ROM like on F9S, cutting a jumper?
Thanks in advance.

Por sdsnatcher73

Enlighted (4294)

Imagen del sdsnatcher73

04-04-2022, 18:45

Unfortunately you have to have a ROM in the socket for the HB-55P as well as the HB-75P, it can be an empty EPROM or a modified version of the original firmware that nolonger boots automatically. You can send me an e-mail if you want the modified ROM content.