Iron - Description of the improvements, which will connect to your
computer any external device, calculated to the serial port (mouse, modem, printer).
IRON
(C) VIC, 1997, Kharkov, Ukraina
Serial port for Spectruma!!!
Description of improvements, which will connect to your
computer any external device, designed for the serial port. For
example - a mouse, modem or printer. Slops port or the software
you can order from me, by phone, given at the end of the
article or by writing to addresses listed there. Thus, the
concept:
A12> 1 A0 DC Q0 15 2 A1 Q1 1914 <7 D1
A14> 3 A2 Q2 1913 <6 D2
Q3 1912 <5 D3 CLK0 9
Q4 1911 <4 D4 G0 11
A3> 4 E1 Q5 10 <3 D5 OUT0 10> FR1
OIRQ> 5 E2 Q6 9 <2 D6
A15> 6 E3 D1 Q7 7 <1 D7 CLK1 15
G1 14
21 CS OUT1 13> FR2
D1 - 1533ID7 A8> 19 A0
D2 - 580VI53 A9> 20 18 A1 CLK2
D3 - 580VV51 (IK51) 22 RD G2 1916
D4 - K170UP2 WR> WR D2 OUT2 23 17> FR3
D5, D6 - K170AP2
1.75Mhz>
D0> D0 27 USART
D1> 28 D1 COM2 April 1 X1 Y1 April 13
D2> D2 1 3 UP1
D3> 2 D3 Y2 May 12
D4> 5 D4 May 2 X2
D5> D5 2 6 UP2 Y3 June 11
D6> 7 D6
D7> 8 D7 June 3 X3 15 <+5 V
1 UP3 D4 8
11 CS RxR 14
WR> 10 WR TxR 15 TXD
RD> 13 RD R1> 2
A8> 12 C / D TxD January 19 1K RXD
RTS on March 23 on February 1 X1 1 <3
FR1 1925 RxC DTR February 24 Y1 7 RTS
> 9 TxC a C D5 <4
April 3 RxD CTS
21 RES CTS June 17 3 <5
1920 CLK DD3 DSR May 22 on Feb. 2 X1 Y1 7 DCD
2 <8
1 C SG
Y2 6, 7
March 3 X2 D6 DTR
> 20
vyv.4 D5 and D6 connected to GND
Vyv.5 D5 and D6 connected to-12V
Vyv.8 D5 and D6 connected to +12 V
Address controller ports:
# 80F7, # 81F7, # 82F7, # 83F7 - Ports timer
# 90F7, # 91F7 - interface ports COM1
When working with the port must first be programmed timer
mode frequency division (mode 3). It is necessary to ensure
that the resulting frequency does not extend beyond the
permissible values (the maximum input frequency RxC / TxC
USART for passport is 615 KHz).
Type of application connector - DB-25P (standard plug an
external modem). For those who do not know, DB-25P connector
means "Fork" or "Dad."
To connect COM2 to use 3 chip
(VV51, UP2, An2). To the inputs 9 and 25 USART must be
submitted instead of the signal FR1 FR2 signal with the timer
and the input signal 11 from 13 O ID7. For signal TxD is
necessary to use free half D5.
For more information, please contact directly to the
me.
(C) Vic at 29.10.96
Phone: (0572) 10-50-26
Now a little history ...
It all started as a kid came to me with two cards on 174UN4A
that we have picked up on the port deck. Before that there were
a couple of articles in magazines and ordered in some
cooperative scheme of connection of some gadgets called "Modem
for ZX ".
We certainly did not work out, but the very fact was enough
long. After there were several schemes that I've seen, but
because of lack of software and programming experience, they
were left without attention. But in vain - there was a very
good decision.
Then followed a short break, during which I tried to use the
pieces AONovskih schemes, but the results were not. Then came
the scheme of the modem in the journal "Spectrofon", to play
Skyuarda modem. At the same time, we finally picked up Sinclair
to AONu. As a result, I had Spectrofon'ovsky option, while
Comrade - AONovsky. We have found a prog Tape Modem and things
got underway. We first talked with the computer, and not some,
and Speccy. We shook their files, though at a rate of 1800
baud, but then it was very cool. I still remember when we
passed Satisfaction, ZX-FORMAT'1 ... I even tried to write
software for this type of modem, but eventually realized that
it was has no singular perspective.
More and more attracted to the idea due to pisyukami and
higher speeds. So, should have been chosen standard, and this
standard became HAYES. So I started working in this direction,
read the literature, questioning people and here in the summer
of 1996 at I get the first modem - Faylin 1200 Non protocols.
Now this of course is ridiculous (for Kharkov), but to
experience it was not entirely bad, even very good. And so I
began to develop an interface to connect a modem, the good in
electronics began to this time to deal relatively well. And
finally, all were collected and included, as always, the first
time nothing Timeout.
After losing two days, everything was fine so that I even
wondered how it could not work before. This landmark date -
September 7, 1996.
In the evening the same day I first contacted the BBC and
all pisishnoy I've read and heard about the BBC suddenly
appeared before my eyes, and, as they say, I felt the steepness
of the phenomenon. At this time I yuzal some terminalku written
by VV51, but I doubt that the author wrote it for actually
running the modem, since there were a few glitches, with which
the work was absolutely impossible. I corrected it, a little
improved by adding exchange protocols And it is enjoying the
job. But the question arose of improving the quality and then
just came by the way the scheme to enhance graphics 512h192
regime. That it was a real buzz from working, especially when I
saw the screen saver mode BBS 85 characters per line, then
there is no breaking of lines - as it should be. Then add
support ANSI, protocol YMODEM, a lot of modes and to this day
it use.
Also now developed an interface circuit that provides
connection of any ISA cards to Sinclair, that is multyahu,
internal modem, etc. Also, absolutely calm connects Screw, Bat,
normal flops. Also at that time, as I have just released a
chart of its interface to me, it became known about a Kharkov
design, which really is not worth the attention at least for
the fact that the modem ports are available on a mask # FFFD
This development was notorious under the name "Shepelevskii
scheme "...
Now a few words about the configuration of my computer:
Pentagon 512K Turbo
2FDDx720k
FDD Turbo Mode
Cache memory
Magic +
Extended graphics, 2 modes
Kempston mouse
Sound AY-3-8910
Covox
Modem interphase + MODEM
Printer
Monitor B'W
Victor.Soroka @ bbs.ktts.kharkov.ua
ZXNet: 0572 / 1
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Iron - Description of the improvements, which will connect to your
computer any external device, calculated to the serial port (mouse, modem, printer).
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