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富士通 FM-7, FM77など用のRS232C+RTCカード(シリアル機能+リアルタイムクロック機能)(自作品です)
 
        

COM+RTCカード表面

COM+RTCカード裏面

接続コネクタ付近

通信テストのFM側画面

通信テストWindows側画面

回路図

FM-7に装着

FM77AV2に装着

  • Product Quantity
    : 1
  • Starting Bid
    :4,000円
  • Highest Bidder
    : lex******** / Rating:4204
  • Listing Date
    :2026年02月24日 11時09分
  • Bidding closes on
    :2026年03月02日 20時51分
  • Auction Number
    :c1220736956
  • Condition
    :New product
  • Automatic Extension
    :Yes
  • Authentication
    :No
  • Early Closing
    :Yes
  • Can I return the product?
    :no
  • Description
  • Q&A ()
  • Cost Estimator
  • Problem Item Response Procedur
Notes
  1. Plug-in electrical appliances are only shipped by air (shipping by sea requires commodity inspection)
  2. Batteries are considered dangerous goods under international shipping regulations and cannot be shipped.
富士通 FM-7, FM77など用のRS232C+RTCカード(シリアル機能+リアルタイムクロック機能)です。

以前、富士通の純正RS232Cカードの回路を解析された方の記事を元にしてカードを製作しました。いくつか変更を加えた改良版を製作しながら使用してきました。詳しくは私のブログに書いてありますので興味のある方はご覧ください。

「FM-7/77用RS-232CカードにRTCモジュールを追加して一枚のカードに」(https://flexonsbd.blogspot.com/2025/10/fm-777rs-232crtc.html)

しかし、FM-7/77の32Pスロットは数少ないので、自作した32Pスロット拡張基板を用いても窮屈になってきました。
ということで、とりあえずRS-232CカードにRTC機能を追加して一枚にまとめたのがこのカードです。
RTC機能についてはZS-042というモジュールを使用し、MC68B21PのポートAを用いてI2C通信で制御しています。
RTC機能を追加したにも関わらず、いくつかのゲートICを一つのGAL20V8Bに置き換えることで元と同じサイズに収めることができました。

純正カードの回路図を元にしているので通信機能は純正品と同様ですが、純正カードは19200baudまでしか対応していないのに対して、使用したOKIの8251Aでは38400baudまで対応しています。(ただし、RS232機能を内蔵している機種では19200baudまでしか設定できませんので、互換性を配慮すると19200baudで使用するのが適切かもしれません。)

RTC(リアルタイムクロック)機能については、RTC_WR2, RTC_RD2, RTC_SET2という3つのF-Basic用のプログラムを作成しました。順に、RTCへの時刻書き込み、読み出し、F-Basicへのセットを実行します。もちろんバッテリバックアップされていますので、電源OFF後も時刻は維持されています。これらのプログラムはFM-7,FM77,FM-11で動作確認をしてあります。

また、このカードを使用してWindows機との間でディスクイメージを転送するプログラムも作成してありますので、FM機用のFDの内容をWindows機に保存することもできます。転送時間はFM->Win、Win->FMの両方向とも2Dディスクでおよそ5分15秒程度で、2DDや2HDではおよそ12~13分程度です。
簡単にこれらのプログラムを試していただけるように、RTC関連の3ソフトと転送用ソフトをFDに収めたものもお付けします。
ということで、このカードを使用するにあたって用意していただく必要があるのは、このカードとWindows機との間を結ぶTTL-USB変換ケーブルです。カード表面に印字してありますが、このケーブルにはTXD, RXD端子の他にRTS, CTSがあるものが必要です。

お譲りするものは画像1のRS232C+RTCカード本体(動作確認を行っただけの未使用品です)と画像9のプログラム入りのFD一枚です。画像7や8に映っておりますTTL-USB変換ケーブルは付属しません。


送付方法ですが、ゆうパケットになります。



(2026年 2月 24日 13時 01分 追加)
書き忘れましたが、画像1に写っておりますボタン電池は配送に制限があるために付属しません。ご了解ください。
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Note: This is a domestic sales tax applied within Japan.

Japan Local Shipping Fee JPY Japan Local Shipping Fee Reference
Product Weight KG The maximum weight limit is 30 kg
International Shipping Methods
Proxy bidding and purchasing services are becoming increasingly convenient. However, overseas shopping carries certain risks and issues. To reduce these risks and enhance shopping safety, please be sure to read the following information:

1. International Shipping

   Air Freight: If the item status is not confirmed within two days after the arrival notice, any customer complaints cannot be addressed with the seller.

2. After Receiving the Product

Please confirm and inspect the product as soon as possible to ensure that the product specifications, quantity, accessories, and description are correct

If, unfortunately, there are any issues, you can refer to the following examples on how to report related product problems:
1. Example of missing product information
2. Example of product not matching provided information
3. Example of damaged product information

Important Notes: 1. If the seller is unwilling to ship overseas or is unaware that the product will be shipped overseas, the international shipping cost for returns or exchanges will need to be borne by the member. You may refer to the EMS e-Express fee inquiry from the post office. If it involves alcoholic beverages or items that affect flight safety, the post office cannot be used for shipment, and only DHL can be used to ship back to Japan.
2. During the product complaint handling period, please retain the complete outer packaging of the product (including the shipping label information), and refrain from attempting any repairs or altering the original condition. Any modifications may result in the inability to process the case.

3. After Inspecting the Product

After receiving and inspecting the item, if you have any questions, it is recommended to contact Letao within 2 hours. Here are some reminders:

1. Please do not unpack, use or repair the received item yourself, and be sure to keep the original packaging to facilitate subsequent handling of related matters, so as to avoid changes to the item that may cause the seller to be unwilling to process.

2. You can call customer service, and the customer service will leave a message for you as below. Please provide the following information:
"Hello, we will first help you establish a complaint case for Product ID: _______ .But we need you to 2-3 clear photos of the product issue, including photos of the product problem, product packaging, shipping details slip, and outer box. Send them to service@letao.my and inform us of your desired resolution (failing to provide this may result in an inability to process subsequent matters). After sending the email, notify us in the customer service message. We will confirm with the seller as soon as possible. and if there are any related questions, we will contact you through the customer service message. Thank you for your cooperation."

Please provide:
1. "Product ID"
2. Photo of the "Delivery Note" (if any)
3. Photos of the outer box (including inner and outer packaging)
4. Photos of the product (Please include relevant descriptions to help us confirm with the seller)

Important Notes:
1. Do not include foreign text or other products in the background of the image.
2. Please keep the complete product packaging (including the shipping label information), and refrain from repairing or altering the original condition on your own, as any changes may result in the case being unable to be processed.
3. Please provide the relevant information within 48 hours to avoid missing the golden hour for reflection and causing situations that cannot be handled.
4. Due to 99% of Japanese sellers being unwilling or unaware of shipping goods overseas, if a seller is willing to handle the issue, the goods must be sent back to Japan, and the international shipping costs incurred must be borne by the member. Letao will use postal EMS international express to send the goods back to Japan.
5. As the goods are purchased from overseas, it may take approximately one to two weeks to complete the relevant processing procedures when issues arise with the goods. Please be reminded that you can inquire about the approximate cost through the EMS service at the post office.

4. FAQ

1. Issue of Authenticity: If antique or branded goods are found to be counterfeit upon receipt, clear photos showing the differences between the genuine product and the imitation must be provided as evidence. If unable to provide relevant proof, assistance can be sought to find a third-party reputable organization for a premium authentication service .
2. Leaking Iron Teapot: If an antique iron teapot is leaking, please take clear photos of the leaking area and provide them.
3. Transport Damage: If the goods are damaged during international shipping (to the pickup point), you need to provide photos of the outer packaging of the parcel and clear photos of the damaged goods' outer packaging.

※ Note: Photos provided to sellers should not contain any foreign-related information.
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    Product name: 富士通 FM-7, FM77など用のRS232C+RTCカード(シリアル機能+リアルタイムクロック機能)(自作品です)
    Notes:
    Customer service hours:
    • Monday to Friday 10:00-18:00
    Customer service hotline:
    Customer Service Email: service@letao.my