2 GND GND
3 ~RDY PD4
4 RXD PD2
- 5 ~RTY PD5
+ 5 ~RTY PD1
6 NC
7 NC
8 5V VCC
Other PC98 converter projects and resource
------------------------------------------
+PC-9800シリーズ テクニカルデータブック HARDWARE 編 1993年 p139, p343
+https://archive.org/stream/PC9800TechnicalDataBookHARDWARE1993/PC-9800TechnicalDataBook_HARDWARE1993#page/n355
+
PC98 to USB
http://davy.nyacom.net/kbd98usb/