Sony HitBit 11 not booting into Sofarun + Mapper Megaram 512kb

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By Manuel

Ascended (18256)

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09-04-2021, 21:55

gdx: but Pentarou said there's 2x 128kB ROMs (see photo IC13 and IC15), one could be the kanji ROM and the other the BIOS/firmware ROM, right?
So, why do you say there is no kanji-ROM?

My best theory is that they prepared the board for smaller ROM chips, but in the end they went for an 1MBit ROM instead for the BASIC and firmware. (The same chip as for the kanji ROM.)

Mars: So, I don't think the machines are incomplete at all. (And thus the text on the Wiki is wrong...)
One of the empty sockets says "BASIC". Do you really think the machine is also without BASIC? Of course not.

By mars2000you

Enlighted (6019)

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09-04-2021, 22:18

Both firmware and Kanji-ROM are mentioned twice on the box (front and back).

So we will see what you really have after the dumps. Too much speculation here, sometimes obviously ignoring the mentions on the box!

By Pentarou

Champion (400)

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09-04-2021, 22:58

gdx is talking about Kanji Level 2, so he is correct in saying that this machine doesn't have it.

How is a Kanji Level 1 ROM mapped? There is no mapper chip, and there are just a few TTL IC around the ROM IC.

By gdx

Enlighted (4830)

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10-04-2021, 02:23

Manuel wrote:

Pentarou said there's 2x 128kB ROMs (see photo IC13 and IC15), one could be the kanji ROM and the other the BIOS/firmware ROM, right?

I can not found the M531000-14 datasheet. I thought it's 2 x 32K / 64K but he is probably right.

Firmware and Kanji-ROM are mentioned on the box and the case. There are even a dictionary English-Japanese but no level is indicated. That's why I think it's not a standard kanji-rom and because components seems to me not quite numerous to do it. Anyway there is no missing Rom on the board pictures. So it remains just to confirm what is the type of Kanji-Rom and the slots map which seems incorrect.

By msxholder

Champion (393)

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10-04-2021, 22:39

It has in 3 subslots firmware 32 kB Data Stradford dictionary date 1985 mentioned in slot 30.
The kanji rom is standard has the characters from 2120h up till 64b8h
The subslot 33 has the crew mentioned from 4f53 ,all persons involved.
My sd card reader is not functional either

By Manuel

Ascended (18256)

Manuel의 아바타

10-04-2021, 22:57

Let's hope Andres can dump the contents of all slots soon Smile (And also the rest of the reverse engineering tests and dumps.)

By gdx

Enlighted (4830)

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11-04-2021, 10:20

Are you sure that the HB-11 doesn't use a mapper for its firmware? 32kB seems to me little for the software inside. Perhaps this is the problem with SD interfaces.

By mars2000you

Enlighted (6019)

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11-04-2021, 10:38

gdx wrote:

Are you sure that the HB-11 doesn't use a mapper for its firmware? 32kB seems to me little for the software inside. Perhaps this is the problem with SD interfaces.

https://www.generation-msx.nl/software/sony/word-land-senten...

http://msx.jpn.org/tagoo/s_check.cgi?LINE=688

わーどらんど2
word land2
(ソニー)
1985年発売
ROM(32KB+T)
¥14800
MSX1(要16KB RAM)

By gdx

Enlighted (4830)

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11-04-2021, 10:44

Word land 2 is simpler and there is not English-Japanese dictionary.

By mars2000you

Enlighted (6019)

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11-04-2021, 11:21

gdx wrote:

Word land 2 is simpler and there is not English-Japanese dictionary.

https://uniabis.net/pico/msx/msxjp/

HB-11 SONY MSX - ワードランド文II搭載 - JIS第一水準 標準漢字ROM

Google translation:

HB-11 SONY MSX - Equipped with Word Land Sentence II - JIS Level 1 Standard Kanji-ROM

On the same page, it is also mentioned that a Kanji-ROM is required to use the Sony HBS-B003C cartridge Word Land Sentence II: HBS-B003C SONY ワードランド文II - 要漢字ROM

You was wrong when talking about 'non-standard Kanji-ROM"... so what must I think???

Edit: the last correction made by msxholder implies that the 96kB ROM can be divided in 3 parts of 32kB: one for the WP (3-1 ?), one for the EN-JP dictionary (3-0 ?) and one probably for the menu (3-3 ?). At the moment, we don't have a dump, so I can only guess...

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