Time Machine - a reality?
(On the brakes for the Spectrum)
(C) NEMO
Nemo with "... irresistible
disgusted watching this sprawling pestilence ... "turbirovanie
Spectrum - machines. Where is it form, for example, to machine
opaque video processor
KAY-type 256 or Scorpion-256
overclocking the RAM as much as 75%?
The only thing you can do in this situation - it
urgently crap "handbrake", a kind of brake, which will help
we curb the power unbelted processors. In the literature
already encountered references to
the possibility of creating such
devices, and now the hour has struck.
However, the Health Ministry in the face
workshop "Shine" has warned that any "makeweight" reduce the
life of your computer.
Here below is a diagram of such brakes, and even lower given
its full description:
The principle of the brake is very simple. Momentum of
regeneration RFSH / received from the processor and discharges
the capacitance C1, which is vremyazadayuschey.
At a given time, equal
T = (R4 + R3) * C1 * 0.42, until the capacitor is charged to
2V, IC DD1 by open-collector output
(OK) (D1.6) is blocking the signal
WAIT / regular treatment of the processor to memory or input
port - output. Depending on the R3 engine of the real drag
coefficient is 1.1 - 6.8 times. Increasing R3 1.5
- 2.5 times, we can further slow down the processor, but many
programs at the same stop, because will have time only
rehearsed procedures initiated by the system timer (INT). If
you do not mind the smell of burning rubber in this
braking safely increase
R3!
Elements D1.1 and D1.2 lock brakes with disk operations, ie
When you need a full CPU power. Transistor
VT1, included emitter follower, coordinate high-resistance
circuit with TTL vremyazadayuschuyu - entrance. Button P1 in a
closed state off the brake. LED will glow like HL1
that the machine is on the handbrake and faster will not attend.
Capacitor C1 does not increase
should be, because will not achieve the minimum ratio
Braking under admissible currents
OK D1.4 and engine R3 (from - for
ignition engine may be
fire or the foothills of current collector
element in the above R3).
Supervisory Software
certainly can gain for themselves
lot of useful information in a lazy game developing
circumstances situations and to appear before him
unattractiveness of the programmer
workshop in all its pristine beauty. Procedure of filling and
formation of sprites, methods
fill the screen, simplified
unwinding "ksorok" - this is not all that can be obtained
using this time machine.
In some programs, the author
failed to detect the instantaneous
commercials firms that
have the property immediately fall into the subconscious
to be imperative
action. Eyes of the operator are used as mere receptors whose
signals are bypassed bark brain, where the
distinguishing ability (intelligence).
An avid player will receive the necessary time for
reflection, given the resistor R3, and to include the right
moment brake fixing P1, overcomes most complex game situation.
The brake should not be included in the
moments when you need a full
computer performance
For example, when working with a tape recorder, modem,
proslushivanii music, etc. Not always well
predictable side effects
associated with the use of this
consoles, yes patience and hard work
little effort. Is conceived only
Dawn tormozostroeniya.
