そろそろ、実際に動かせるんじゃないかと思っていろいろやった結果、コネクタの不明だった最後のピンが-12Vであることが分かった。RS232Cだと分かった時点で気づきたかった…。図を以下に示す。 ということで、すべてのピンアウトが明らかになって通信できる…

I checked around the HD6303RP and found that it was also using the SCI of the 6303. The following is the wiring diagram that I found out, although CTS and RTS are unknown, it is probably as shown in the diagram. Correction: Mr. Asakawa, a …

The keyboard board had an MC1489 mounted on it. From this, it was found that it was doing serial communication via RS232C. The MC1489 works as Quad Line EIA-232D Receivers. This information was clarified and is shown in the following figur…

I have only one keyboard made by SORD, and that is for the M323SX-III. I am hoping that by analyzing this keyboard, I will be able to gain some insight into the keyboard mechanisms of other models. Inner board of M323SX-III keyboard. HD630…

It is almost certain that the communication between the keyboard and the main unit of the SORD M68MX is serial communication via RS232C, as expected. The pinout of the CHARACTER CRT port is as follows. CHARACTER CRT port DB25pin 1 --- GND …

When I opened the very heavy enclosure, I found two boards placed on top of each other. The upper layer of boards appears to be the VRAM area directly connected to the graphics CRT port. The lower layer board contains the MC68000; if you l…

I got a SORD M68MX at an auction for 2000 yen. This blog is a record of my analysis of the M68MX and other SORD products. The SORD M68MX is a multi-function computer released in May 1985 (according to SORD's company history). 1983 saw the …