Telephone cards. [part 2]

Hello to you, All. I had one problem, the duration of the signals, this is what I dug up in old mail about this: *** as if the beginning of the file FROM_MAIL.TXT *** And the minimum pulse times and the interval between pulses of the signal Clk when reading cards are defined at 8 and 10 µs. *** seems to be the end of the file FROM_MAIL.TXT **** Well, gentlemen, we draw conclusions: The normal frequency of the Z80 is 3.5 MHz, one clock cycle processor ~0.285 µs, if you attach the card to the printer port like this: Printer port Card D0 --> RES D1 --> CLK BUSY <-- DATA then to reset the card and start reading the card, the program will be something like this: LD D,1 ; RES=1 CLK=0 LD E,2 ; RES=0 CLK=1 LD H,3 ; RES=1 CLK=1 LD L,0 ; RES=0 CLK=0 LD BC,PRINTER_PORT ; Reset the card and read the first bit OUT (C),D ; 12 clock cycles = 3.42 µs NOP; 1.14 µs (just in case) OUT (C),H ; 3.42 µs NOP (4 pieces); 4.56 µs OUT(C),D OUT(C),L IN A,(#1F) ; reading the bit (I have BUSY - bit 7 of port #1F) LD (ADRES1),A ; Reading the remaining bits (how many bits this segment is repeated so many times; code) OUT(C),E NOP NOP NOP NOP OUT(C),L IN A,(#1F) LD (ADRESS2),A and so on... I haven’t been able to test this in action yet, I don’t have enough time, the programraw, just invented, you can’t really trust it, you have to do it debug what I want to do in the near future... If anyone needs a document on cards and software support on an offtopic site, I can throw (everything I found weighs ~500 kilos per pack)... Sincerely, Max Melnikov... aka HighLander... aka Uncle Maximka... -+- = Very golden grandfather, sample 3.00.Alpha5 = --- + Origin: PC - a cure for brains... (500:3432/13) *** as if the end of the file GED_FIL.OUT **** Sincerely, Max Melnikov... aka HighLander... aka Uncle Maximka...