Dumping/reverse engineering MSX models thread

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By sdsnatcher73

Prophet (2237)

Аватар пользователя sdsnatcher73

12-12-2020, 16:55

mars2000you wrote:

Besides, you need also to dump the Kanji-ROM JIS1.

Yeah I want to do that but can it be done by software?

By mars2000you

Enlighted (5984)

Аватар пользователя mars2000you

12-12-2020, 16:58

sdsnatcher73 wrote:
mars2000you wrote:

Besides, you need also to dump the Kanji-ROM JIS1.

Yeah I want to do that but can it be done by software?

Try KANJIROM.BAS (also available on the blueMSX site - http://bluemsx.msxblue.com)

By sdsnatcher73

Prophet (2237)

Аватар пользователя sdsnatcher73

12-12-2020, 18:25

Hmm, that either crashes or says there is no kanji ROM (but it does show the menu). I tried with Burai, no kanji are being displayed. My machine may be defective or there may just not be a Kanji ROM in the T600.... by the way testram.bas also crashes during determining/display contents of slot 3 (and the subslots).

By sdsnatcher73

Prophet (2237)

Аватар пользователя sdsnatcher73

12-12-2020, 18:27

Another possibility is that the Kanji ROM is non standard and used only by the firmware. How to launch the firmware anyway?

By mars2000you

Enlighted (5984)

Аватар пользователя mars2000you

12-12-2020, 18:30

CALL TELCOM (as mentioned in the Wiki)

By mars2000you

Enlighted (5984)

Аватар пользователя mars2000you

12-12-2020, 18:34

Maybe you have a modified machine (what should explain an additional ROM in slot 3-2):

Some other excepts from the (now gone) Japanese site:

ソニーHB-T600[株式ターミナル] & HB-T7[通信パソコン]

 このマシンは本来キーボード別売で株式パッドが標準装備の変わり種であった。株式投資ソフト(FD)もついていた。でも多くのユーザーがMSXだと知って結局キーボードも買ってしまう傾向にあり、ヤフオクでも半々の確率でキーボードがついてくる(爆)
 RAM128kB&FDD付&キーボードセパレートの上級機であり、モデム内蔵なのでパソコン通信機としても使える。
 株式用ゆえ漢字ROMも内蔵、しかもスロットは2つあるので拡張性もなかなか(笑)
 HB-F900と実売価格差は少ないのに、ヤフオクでは価格が半額以下になっている…なんてこった (^^ゞ

 同じく通信に使えるMSX2には兄弟分のHB-T7もある。こっちはRAM64kBと普通だが漢字ROM搭載。
 FDDは付いていないが後にHBD-F1など安いFDDが出まわったためあまり困らない
 これに限らずMSX2通信パソコンはすべて第1水準漢字ROMを標準搭載している。三菱ML-TS2Hに至っては第2水準も搭載
 モデム付なのでMSX2ホストソフト「網元さん」などで稼動するケースが多い。タマ数が少なくないのか、T7はヤフオクで時々出てくる。

Google translation:

 Sony HB-T600 [Stock Terminal] & HB-T7 [Communication PC]

 This machine was originally a variant of the keyboard sold separately and equipped with a stock pad as standard equipment. Stock investment software (FD) was also included. However, many users tend to buy a keyboard after knowing that it is MSX, and even Yahoo Auction comes with a keyboard with a half probability (explosion)
 It is a high-end machine with RAM 128 kB & FDD & keyboard separate, and a personal computer communication device because it has a built-in modem. Can also be used as.
 Since it is for stocks, it has a built-in Kanji ROM, and since it has two slots, it is quite expandable (laughs) Although the
 actual selling price difference is small with HB-F900, the price is less than half the price at Yahoo Auction ... (^^ ゞ

 MSX2, which can also be used for communication, also has a sibling HB-T7. This is a normal RAM 64kB, but equipped with a Kanji ROM.
 Although it does not have an FDD, it is not a problem because cheap FDDs such as HBD-F1 came out later.
 Not limited to this, all MSX2 communication personal computers are equipped with a first-level Kanji ROM as standard equipment. Since the Mitsubishi ML-TS2H is equipped
 with a modem equipped with the second level, it often runs on the MSX2 host software "Amimoto-san". Perhaps the number of balls is not small, T7 sometimes appears on Yahoo Auction.

By sdsnatcher73

Prophet (2237)

Аватар пользователя sdsnatcher73

12-12-2020, 19:14

I guess if someone can figure out what the ROM in 3-2 does that would help in determining if it was modified.

By mars2000you

Enlighted (5984)

Аватар пользователя mars2000you

12-12-2020, 20:40

It's maybe a database used by the firmware.

There are two visible words: KANDA and TAMRO.

KANDA = 神田 = place name in the northeastern part of Chiyoda-ku, Tokyo. https://ja.wikipedia.org/wiki/%E7%A5%9E%E7%94%B0_(%E5%8D%83%E4%BB%A3%E7%94%B0%E5%8C%BA)

TAMRO = TAMURO = タムロ seems to refer to Chinese food as 屯 (タムロ) - 神田/中華料理 [食べログ] means Tun-Kanda / Chinese food [tabelog]

Maybe it uses only kanas, and it would explain the removal of the Kanji-ROM....

By sdsnatcher73

Prophet (2237)

Аватар пользователя sdsnatcher73

13-12-2020, 16:24

I wonder where the kanji ROM would be. If you look at the photos on the T600’s wiki it has basically 2 boards (3 if you include the HBI1200). But there do not appear to be a lot of ROM chips (I haven’t found the VDP on the photos even)... it puzzles me a bit...

From the looks of it the CPU main board is the same as an HB-F700 (from the PU-53 code on it).

Photo of F700D mainboard courtesy of Hamlet:

Difference with the T600 are 4 less RAM chips (as it has 128kB vs 256kB in the F700) and the missing external FDD connector...

By hamlet

Scribe (3671)

Аватар пользователя hamlet

13-12-2020, 17:06

Some detailed picture of the T600 and its daughterboard:



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