Correction, comment........Please!!!

[senoseno]

I need correction, comment or anything else for this design

https://obrazki.elektroda.pl/46_1204702552.jpg
https://obrazki.elektroda.pl/46_1204702552.jpg

 

[laktronics]

Hi,
The connections match with PC's standard parallel port signals and can be interfaced to it. All signals at pins 1,14,17 are inverted bits. Signal at pin16 and pins2 to 9 are noninverted outputs.
Regards,
Laktronics

 

[H_D_R]

Hi,
The connections match with PC's standard parallel port signals and can be interfaced to it. All signals at pins 1,14,17 are inverted bits. Signal at pin16 and pins2 to 9 are noninverted outputs.
Regards,
Laktronics

yes laktronics is right.

i think since @ 1, 14 pin are connected to READ and WRITE (which are active low) you need to connet then with +5V via pullup resistors.

please cross check it before implment.
visit the following link and check the connection.
i know circuit is different but main concept of 8255 connection with parallel port will be same. am i right??

-->> **broken link removed**