*********** ************ PLANET SHELEZYAKA
HARDWARE CLOCK FOR ZX SPECTRUM
(C) Mr.Gluk
(C) V. Kazakov
Bring to your attention on the chip circuit clock KR512VI1
developed Mr.Gluk 'th, and has kindly given me VEL'om / PXM /
CTL.
Since the description of the scheme is somewhat Gluk'om
chaotic nature, I took the liberty of some to reduce and
recycle all of the text. Also, I felt it necessary to publish a
small revision of the scheme to supply hours of FE computer at
a time when it is enabled. I hope that the author hours scheme
will not be on me in the offense.
Revised scheme taken from RADIOEZHEGODNIKA 1989
Full text of the description of copyright work hours
You can buy a newspaper.
So now the scheme.
- +
4-6B
battery
10p
o X o January 1924
32768Hz 22M 10k
ZQ o February 1923 X
o o o o March 22
20p 470k
/ D0 April 21 X
By May 1920 D1 o
D2 June 19 X
w
D3 July 1918
and
D4 August 1917
n
D5 September 1916 X
e
D6 October 1915
D7 11 KR512 14
VI1
December 1913
LL1
A3 1 o (c) Mr.Gluk
/ IORQ
LE1
DS
o 1 o
A13
AS
1 o
A14
TM8
LE1 D7
D0 / Q0o
/ WR o Jan. 1 C
A12 / RES
D
LL1 LL1
DD1 - 555LE1, DD2 - 555LL1 as DD3 better
555TM8 use, but you can TM2.
After assembling the circuit there unpleasant phenomenon -
# FFFC is an even address, and avoid dryganiya curbs should be
put lock sampling port # FE at sample # FFFC.
Accuracy can be adjusted, you need to do
instead of one of the capacitors supply podstroechnik.
Access to the hours performed by setting the 7-th bit port #
FFFC, otherwise - in port space companies do not have hours.
After the installation of above-mentioned bit to 1, you can
access to the ports of chips: - # EFF7 - register Data, # DFF7
- address register.
In the address register stores the address of the necessary
cell in the data register is written data
record set in cell m / s, as well as the data is read from the
selected cell.
Now that it represents m / sec. For
Programmer - a device with 64 presets, some of which are
occupied by official registers.
Address
# 00 - seconds
# 01 - second clock
# 02 - minutes
# 03 - minute alarm
# 04 - Hours
# 05 - Alarm Clock
# 06 - the day of the week
# 07 - the number of
# 08 - month
# 09 - the last two digits of the year
# 0A - business case
# 0B - the same
# 0C - the same
# 0D - the same
# 0E here until the end (# 3F) - RAM user.
And now the scheme is finalized.
VD1 +4-6 B
<> Battery
24 VD2 +5 B complex
o <o>
2 KR512VI1 23
R1 R2
March 22 220k 10k
o
April 1921
VD1, VD3
May 20 KD522A
June 1919 VD2
D9B
July 1918 VD3
o o>
C1 C2
(C) V. Kazakov 4700 4700
To date, the hardware clock uses
Once the new firmware ROM Mr.Gluk 'and "MR GLUK RESET
SERVICE v5.1 "(for the Pentagon?), But CMOS Commander
v 0.8, which are available in the newspaper.
Although it may be something else and has been written ...
