China DOS Union

Can all DOS hardware be designed and manufactured entirely by oneself (not assembly)?

In Shenzhen and Beijing, there are many design companies of PC104 industrial control motherboards, for example, one of them

http://www.idea-tech.cn/
Shenzhen Hengbang Xinchuang Technology Co., Ltd.
Address: 5th Floor, Building C, Skyworth Innovation Valley, No. 1 Tangtou Road, Shiyan, Bao'an District, Shenzhen
Telephone: 0755-88878093
Fax: 0755-86652820

http://www.idea-tech.cn/
Beijing Hengbang Xinchuang Technology Co., Ltd.
Address: 4th Floor, Building 1, Longxin Industrial Park, No. 1 Courtyard, Wensong Road, Zhongguancun Environmental Protection Science and Technology Park, Haidian District, Beijing
Telephone: 010-82435056
Fax: 010-82435055

http://www.idea-tech.cn/
Shanghai Hengbang Xinchuang Intelligent Technology Co., Ltd.
Address: Room 607, Building 1, Modern Logistics Building, No. 488 Hongcao Road, Xuhui District, Shanghai
Telephone: 021-61260196
Fax: 021-61260195

http://www.hsem.com.cn
Shenzhen Hengsheng Electronic Technology Co., Ltd.
Address: F1-8C, TCL International E-city, No. 1001 Zhongshan Yuan Road, Nanshan District, Shenzhen
Telephone: 0755-88354546
Fax: 0755-88354543

[ Last edited by firstsail on 2018-7-16 at 10:03 ]

Are there any inexpensive small component production and sales similar to the subor learning machine type of board card machines, then making various hardware contents by oneself, and then assembling them by oneself?

My idea is to find a loose thing that can be compiled with machine code, and then the machine code is assembled into a dot matrix (here, the assembly means that the machine code directly forms the dot matrix characters of GB18030). It is related to GB18030, burned into a board card, and then the graphical GB18030 is output by the display.
1. All parts need to be produced in mainland China, not assembling other chips.
2. Before the realization of GB18030, English is not involved, and this realization process is completed with machine code. Until the realization of GB18030, English and other characters can be selected in GB18030.



[ Last edited by zzz19760225 on 2018-7-16 at 10:53 ]

Nowadays, general ARM chips, CPLD chips, and FPGA chips can far exceed the functions you want to implement. Each chip only costs about 5 to 15 yuan, and it's very powerful!

Originally posted by firstsail at 2018-7-16 18:42:
Nowadays, general ARM chips, CPLD chips, and FPGA chips can far exceed the functions you want to implement. Each chip only costs about 5-15 yuan, and it is very powerful!

Hmm, I'll take a look again, thank you!

Originally posted by firstsail at 2018-7-16 09:59:
There are many PC104 industrial control motherboard design companies in Shenzhen and Beijing, for example, one of them

http://www.idea-tech.cn/
Shenzhen Henbang Xinchuang Technology Co., Ltd.
Address: Shibao'an District, Shenzhen ...

Is there any introduction material about the production of diodes and transistors, mainly transistors, from domestic state-owned enterprises and private enterprises on the Chinese mainland?

Because I don't know which category the problem belongs to in the forum, so I follow in the post.
The problem is about transistors, which is simple in computer majors, but it's difficult for me who wants to choose the switching effect and be familiar with it.
The things said on the Internet are almost confusing me, and I haven't figured out what they are talking about.
I just want to know:
For a PNP transistor, is it disconnected when the middle is powered on (or at a high level)?
For an NPN transistor, is it turned on when the middle is powered on (or at a low level)?
(No matter the result of the answer, points will be given in general, no matter how much)