rs232

Press RESET immediately, Vassili! 07 Feb 02 01:20, Kirill Frolov wrote to Vassili Klimov: VK>>> Please post a schematic of the subject for BB51/BB53. As far as I remember she was in VK>>> some Online, and then somewhere else... KF>>> Or maybe it’s not necessary? Well, if you really need it. Scheme from VMG. (C) VIC, 1997, Kharkov, Ukraine Serial port for Spectruma!!! Description of the modification that will allow you to connect to your computer computer any external device designed for serial body port. For example, a mouse, modem or printer. Ready board ports or software you can order from me, by calling the phone number given at the end of the article or by writing to addresses indicated there. So, the schematic diagram: ┌──┬──┬──┐ ┌──┬──┬────┐ A12>──1┤A0│DC│Q0╞15─────────┐ <─8┤D0│PT│ │ ┌──<+5V A13>──2┤A1│ │Q1╞14───┐ │ <─7┤D1│ │ │ │ A14>──3┤A2│ │Q2╞13 │ │ <─6┤D2│ │ │ │ │ │ │Q3╞12 │ │ <─5┤D3│ │CLK0├9──┼─┐ │ │ │Q4╞11 │ │ <─4┤D4│ │G0 ├11─╡ │ A3>──4╡E1│ │Q5╞10 │ │ <─3┤D5│ │OUT0├10─┼─┼──>FR1 OIRQ>──5╡E2│ │Q6╞9 │ │ <─2┤D6│ ├────┤ │ │ └──┴──┴──┘ │ │ ├──┤ │G1 ├14─╡ │ │ └────21╡CS│ │OUT1├13─┼─┼──>FR2 D1 - 1533ИД7 │ A8>──19┤A0│ ├────┤ │ │ D2 - 580ВИ53 │ A9>──20┤A1│ │CLK2├18─┼─╡ D3 - 580ВВ51(ИК51) │ ┌─22╡RD│ │G2 ├16─╡ │ D4 - К170УП2 │ WR>┼─23╡WR│D2│OUT2├17─┼─┼──>FR3 D5,D6 - К170АП2 │ │ └──┴──┴────┘ │ │ │ └──────────────────╡ │ 1.75Mhz >──────────────┼───╥─── ────────────────────┼─┘ ┌─────────────────┘ │ ┌───────────────┘ │ ┌───┬─────┬───┐ │ ╔════╪══════════════════╗ D7>──┼──8┤D7 │ │ │ │ ║ ╟3─┼─6┤X3 │ │ ├15───<+5V│ ├───┤ │ │ │ ║ ║ ╞─1┤УП3│D4│ ├8──┐ └─11╡CS │ │RxR├14 │ ║ ║ │ └───┴──┴──┘ ┴ WR>────10╡WR │ │TxR├15 │ ║ ╚══╪═══════════════╗ TXD RD>────13╡RD │ ├───┤ │ ║ R1║ ┌─╫──────>2 A8>────12┤C/D│ │TxD├19─┼─1╢ 1K║ ┌──┬──┬──┐ │ ║ RXD ├───┤ │RTS╞23─┼─3╫1───┼─2┤X1│ │ │ │ ╟1─────<3 FR1 ┌──25┤RxC│ │DTR╞24─┼─2╢ │ ├──┤ │Y1╞7┘ ║ RTS >────╨───9┤TxC│ ├───┤ │ ║ ╞─1┤C │D5│ │ ┌─╫──────<4 ├───┤ │RxD├3──┼─4╢ │ └──┴──┴──┘ │ ║ CTS ┌───21┤RES│ │CTS╞17─┼─6╢ │ ┌──┬──┬──┐ │ ╟3─────<5 │ ┌─20┤CLK│ DD3 │DSR╞22─┼─5╫2───┼─2┤X1│ │Y1╞7┘ ║ DCD │ │ └───┴─────┴───┘ │ ║ │ ├──┤ │ │ ╙2─────<8 │ └─────────────────────┘ ║ └─1┤C │ ├──┤ SG ┴ ║ ├──┤ │Y2╞6─┐ ┌─────>7 ╙3─────3┤X2│D6│ │ │ ┴ DTR └──┴──┴──┘ └───────>20 выв.4 D5 и D6 соединить с GND Выв.5 D5 и D6 соединить с -12В Выв.8 D5 и D6 соединить с +12В Адреса портов контроллера: #80F7, #81F7, #82F7, #83F7 - порты таймера #90F7, #91F7 - порты интерфейса COM1 При работе с портом вначале необходимо запрограммировать тай-measures for frequency division mode (mode 3). In this case, it is necessary to follow ensure that the resulting frequency does not go beyond the permissible limits tim values (maximum frequency at the RxC/TxC inputs of the USART according to passport is 615 KHz). The type of connector used is DB-25P (standard external connector modem). For those who don't know, DB-25P means connector type "fork" or "dad". To connect COM2 you need to use 3 chips (BB51, UP2, AP2). and USART inputs 9 and 25 must be supplied together then the signal FR1 is the signal FR2 from the timer, and to input 11 the signal from 13 output ID7. For TxD signal you must use free half D5. For more information please contact directly me. ┌─────────────────────────────── ───────────────────────────────┐ │ (c) Vic at 10.29.96 │ │ Phone: (0572) 10-50-26 │ └─────────────────────────────── ───────────────────────────────┘ Now a little history... It all started when a guy came to me with two boards - mi on 174УН4А, which we hooked up to the tape recorder port. Before this- there were a couple of articles in magazines and ordered from some co-op Here is a wiring diagram for some kind of gadget called “Modem for ZX". Of course, nothing worked out for us, but the fact itself was enoughfor a long time. Afterwards there were several diagrams that I saw, but due to lack of software and programming experience, they were left without attention. But in vain - there were some very good solutions there. Then there was a short break, during which I I tried to use pieces of AON circuits, but there were no results. Then a modem diagram appeared in the Spectrofon magazine, for playing Modem steward. At the same time, we finally hooked up with Sinclair AOHnu. And as a result, I had the Spectrofon version, and Comrade - AONovsky. We found a program for Tape Modem and things went well. It's in full swing. We spoke for the first time using a computer, and not some, but Speccy. We downloaded files, albeit at speed 1800 baud, but then it was very cool. I still remember when we broadcast Satisfaction, ZX-FORMAT'1... I even tried to write software for this type of modem, but in the end I realized that it was does not have any special prospects. More and more attracted by the idea of communication with pussies and greater speed. So, a standard had to be chosen, and with this HAYES became the standard. That's why I started working in this direction - research, read the literature, asked people, and in the summer of 96 The first modem appears to me - Faylin 1200 without protocols. This- an hour is of course funny (for Kharkov), but for reference it’s It wasn't entirely bad, even very good. And so I began to developBotka modem connection interface, fortunately in electronics it has become At this time it is relatively good to understand. And that's all at last was assembled and turned on and, as always, nothing happened the first time it came out. After wasting two days, everything worked so well that I was even surprised - I wonder how it could not have worked before. This significant date - September 7, 1996. In the evening of the same day I contacted the pisish BBC for the first time and that’s it what I read and heard about BBS suddenly appeared before my eyes - mi, and, as they say, I felt the steepness of the phenomenon. At this time I I used some kind of terminal written under BB51, but I doubt it that the author wrote it for a really working modem, since there there were several glitches that were absolutely impossible to work with possible. I fixed it, improved it a little, added exchange protocols and thoroughly enjoyed my work. But the question arose about improving the quality twa and here the scheme for expanding graphics to 512x192 mode. It was a real thrill to work, especially when I saw the BBC screensavers in 85 characters per line mode, then there is no breaking of lines - as it SHOULD BE. After that I added ANSI support, YMODEM protocol, a bunch of modes and to this day I use it. An interface scheme has also now been developed that provides connecting any ISA card to a sinclair, that is, multitahu, mo-dem internal, etc. Also connects absolutely easily screw, mouse, normal flops. Also while I'm just you- sent the diagram of his interface to me, it became known about another one Kharkov development, which is really not worth attention at all at least for the fact that the modem ports are accessible using the mask #FFFD This the development was notorious under the name "Shepelevskaya diagrams"... * Originally in NETMAIL *Crossposted in REAL.SPECCY *Crossposted in HARDWARE.ZX