Protocols

Hi, All! People! People! Give protocols for data transmission from EMS or MMD!!! And teach them how to make them work, if possible... Lots of literature welcome. P.S. I got carried away by ZX<>PC LINK - I have the hardware, I need to write a program... Bye All...

Press RESET immediately, Konstantin! 26 Jul 02 16:40, Konstantin Butorin wrote to All: KB> People! People! Give data transfer protocols from EMS or MMD!!! What protocols? What level? KB> And teach them how to make them work, if possible... A bunch of literature KB> welcome. To the library... KB> P.S. I got carried away by ZX<>PC LINK - I have the hardware, I need to write a program... Then you need an X-modem. Yes, there are no differences, only blocks of 256 bytes and everything is transmitted in the hobet. This is about MMD. But nothing is known about EMS.

Hi, Kirill! KB>> People! People! Give data transfer protocols from EMS or MMD KF> What protocols? What level? The lowest ;) Allegedly, data transfer for the PC is a standard function and This is controlled by a standard microcircuit. I would like this chip on spec emulate. KB>> And teach them how to make them work, if possible... A bunch KB>> literature is welcome. KF> To the library... Can you also tell me what I need there? KB>> P.S. I got carried away by ZX<>PC LINK - I have the hardware, I need to write a program... KF> Then you need an X-modem. Yes, there are no differences, only blocks by KF> 256 bytes and everything is transmitted in the hob. This is about MMD. And about EMS KF> nothing is known. Will it work with the PC_X-modem_protocol? Bye Kirill...

Press RESET immediately, Konstantin! 03 Aug 02 16:00, Konstantin Butorin wrote to Kirill Frolov: KB>>> People! People! Give data transfer protocols from EMS or MMD KF>> What protocols? What level? KB> The lowest ;) Allegedly, data transfer for the PC is a standard function and KB> this is controlled by a standard microcircuit. I would like this chip on spec KB> emulate. X-Modem? What microcircuit? Or are you talking about RS232? So everything is like in the book: start bit, N[5-8] data bit, N[0-1] bit (un)parity, N[1-2]-stop bit. Bit interval duration 1/115200, 1/57600, 1/38400,... 1/1200 shares seconds. Zero is coded with a voltage of +3..+12 volts, one -3..-12 volts. In reality, a modern pisish port perceives 0 volts as log.1 - this is a feature for devices without a voltage source of negative polarity. Well, it digs all +/-12 volts, up to 20 mA of current can be removed. KB>>> P.S. I got carried away by ZX<>PC LINK - I have the hardware, I need to write a program... KF>> Then you need an X-modem. Yes, there are no differences, only blocks KF>> 256 bytes each and everything is transmitted in the hob. This is about MMD. And about KF>> EMS knows nothing. KB> Will it work with the PC_X-modem_protocol? With mmd older versions (2.20 from 1997) - it will probably be. With new ones (4.xx) it won’t, it didn’t work for me with them, about 1.5-2 years ago... It’s just in new MMDs the 128-byte x-modem is broken, only the 256-byte one works, but for PC it is not standard. For a 256-byte protocol on a PC, I can issue a program (src) in Pascal. It works through FOSSIL and only in DOS (in the Windows DOS emulator, semi-axis Linux also works). On fast computers it may crash with an error (due to DOS pascal).