601900
Hello, dear Nemo!
Wrote a letter for you to ask one to my question, but at the
same time and ask to send a full set of advertising and
price-lists, because all old Prices are already distributed to
friends and sent penpals. Stamps in the amount of 5
rub. attached.
The question here is how. What are the requirements
shall be made to the program to
it can fully work with the RAM-disk? Well, then, that the
direct programming of VG93 is unacceptable - this is
understandable, but what else?
And one more question on this topic. Because I
is not yet a proud owner of
HDD controller, I want to ask
comparable whether the speed of the propeller with
speed with RAM-disk?
In conclusion, I want to lead
Here are some example. On my Pentagon'e
program SLIDE SHOW SAGE GRONP [???] works without problems on
the RAM-disk, ie from and up (only need to set up SETUP).
Performing the same actions on an electronic disk KAY'ya my
friend, SLIDE SHOW works, but not until the end of that very
strange. And this is not an isolated case (direct programming
SH I do not take into account).
Of course, you could say "it handles in the curves of
programmers, but it is for In order to avoid such situations, I
and ask this question.
That's it. At this permit bow. I await your reply with
impatience.
N.
08.05.2000
Dear N!
1. On your first question, a request for
STA Constantine Verbova:
"What requirements must be presented
to the program so that it can fully
work with the RAM-disk? "(would be more accurate
name not RAM-disk, and RAM-drive,
as is a subsystem TRDOS, simulating
drive, not just RAM-disk - so
more precisely. This is a more accurate name).
1). Treatment only on standard
entry points in TRDOS. Standard entry points are entry points
described in the book Larchenko "TRDOS for users
and programmers. "
2). Variables TRDOS in no case
should not be affected (those that are relevant to the drive):
- Variable speed moving the head
- A pointer such as disk drives
(Only 8 bytes)
3). All reserved or used TRDOS'om variables also should not
be changed.
Presumably, the - maybe - will be written by a new version
(and later D9901), which will be addressed some weaknesses
(Section 2 relates only to the version of D9901).
Specific terms are not purposely set out, in order not to
provoke the audience to idle programming rukosuystvo.
More detailed explanations can be obtained by writing to
appeal directly to the company-developer of flash RAM-drive
"CPG-Compex" (to Konstantin Verbova) on
address: 192007, SP-B, PO Box 142.
2. "Comparable whether the speed of the propeller to the
speed of a RAM-disk (Again more precisely - from RAM-disk
drive). "
The question is, generally speaking, is not entirely
correct. It all depends on what you mean by speed. If the
instantaneous peak rate of exchange (transfer) files (file
names, not just data because a RAM-drive, and not
RAM-disk!) Within TRDOS, then several
(Slightly) faster than a hard drive
(Again refers to the peak, instantaneous rate of exchange). In
principle, this should be tested, given the specificity of each
particular problem. Must Also note that firmware TRDOS always
works in the mode NORMAL (not TURBO).
At the same time, as soon as you try to go beyond the
RAM-drive, then speed of the system as a whole (ie, the real
rate) to fall sharply. When working with files that are larger
than the size of TRDOS-diskettes as well as with the structures
files (even small enough to fit on the RAM-disk drive) speed
(taking into account the reaction OS ISDOS) hard drive will be
higher - moreover, many times.
3. "SLIDE SHOW" is working, but not to
end, which is very strange ... "If you
hack program, it is nothing strange
not detect. Programs that were
written under the Pentagon or on Pentagon'e,
usually written NON-SPECTRUM,
as some abstract architecture and
under certain hardware, a specific
clone, namely - Pentagon. Cracking a program, you can verify
this. Moreover, these errors are relatively easy to "patch",
which indicates that their artificial neorganichnoe origin - is,
in the first place. Secondly, the program after modifications
greatly increases its software compatibility - and is,
incidentally, at the same Pentagon'e and many other
clones, which had never walked.
As a rule, "Vagrants" are reduced to several types:
1. Use of undocumented
teams
2. The use of physical addresses
instead of logical. (Note: different clones of physical
addresses can be somewhat arbitrary (some bits), the same
logical addresses are the same almost all clones. At
least logical addresses coincide more often
than the physical.) Example: The port (s) # 1FFD and
# 7FFD. It is clear that, by addressing # FD
(Single-byte output port), the MSB address bus dub junior or
exposed to high byte content
battery. If the bits of high byte is not
participate in the selection of ports (as in Pentagon'e), then
it goes ON PENTAGON'e. At the slightest attempt to expand the
program starts to fail, the complex acquires switches, and the
person (user) - caring for their diversion. Similarly, when
transfer the program to other computer programs, also began
buggy. Fail also begins because the program was written
under the Pentagon, - ie a clone.
3. Using the program specifics
microarchitecture specific clone. Example: demomeyking again on
the same Pentagon'e. Pentagon'ovsky video processor MOST
NON-STANDARD among Spectrum-clones - and it opens a wide field
of activities to create programs that Will not go on any
Spectrum'e. The video processor Pentagon'a - it's not his
dignity, as some think, but its drawback. Dignity as a linear
processor mode NORMAL (3.5 MHz), better known in wider circles
as no-WAIT'ovost. At KAY'e can create nothing worse (and even
the best) demos than Pentagon'e, - but the audience,
thank God, is not abusing this
stupidity on KAY'e (not accumulated kitchen
recipes).
4. Poll ports, in which some
Bits implied constants - and
Significance in treatment. This is a profound stupidity. The
bottom line is that the person writing program, do not
understand that the port - is an input - output, and
bits in it at random (ie, determined
external to the computer environment)
by definition. If any discharge is not
So in the program, or do not understand it
appointment, it should be blacked out.
Otherwise - the glitches.
(C) Nemo.
428034 10.05.2000
Hi, dear St. Petersburg!
I - a resident of a modest provincial
town, SYSOP resting until TITANIC-BBS (we mostly Vicom-modem'y)
with a bow, I beg you to send me a catalog
Your hardware and software development
(Preferably on a diskette) and price list with
rates for them. I also heard that
that you are somehow associated with the firm "Logros",
If you are not hard to send their catalog
(Do not peel me like a sticky ...)
In our city, just go over the network
Legends about your miracle - General Sound'e, I
would like to study it more in detail
and, possibly, make you good publicity ...
N.
Dear N!
1.Tverdaya copy, compared with the files on the diskette
more quickly. This is explained by the fact that those who
receive hard copies of the letter, sometimes pay
money, unlike those who receive
files for free. In addition, the price in a certain sense - a
contract to supply and client requests are usually it. An
electronic version can be used only in README order - not more
than.
2. Logros firm ceased its operation - thanks to the
proliferation of networks. Networks have found Freestuff
resource and fully destroy it. So now bast soup
slurp. At the same time to reflect on the topic:
"Sometimes there such a freebie, which nobody
not worth the money? And if it happens that someone in
each case pays? And who
Should pay? "I think the catalog has lost
relevance, but does not send a pity. I
to do this because Akimov put money
in the Spectrum, - and someone lecturing. So
that the health to enjoy.
3. By GS informational and promotional materials included in
the package of advertising (of course, hard copy).
(C) Nemo.
425200 14.05.2000
Dear captain Nemo!
I write to you first. The fact that I
I want to connect a mouse to a computer. You can certainly use
MKEY, but he was not yet (seen in your friend's price list).
Think connect the mouse via KEMPSTON MOUSE INTERFACE to Create
Soft (see diagram in the ZX-F Number 5). Certainly do not want
to engage in "creative kitchen", but according to my data This
interface is no longer available. You do not in the course,
where you can order an interface or bare board? How do you feel
about this interface?
Once one of the ZX-F mentioned
that can be emulated Kempston-joystick
mouse collecting shemku on 2 buildings TM2.
You do not know, looks like this shemka?
Of course, the emulation of joysticks - is
yesterday, but I still want to
to begin to collect the emulator, connecting to
connector on the joystick, and only then take up
mouse interface, groping for a soldering iron
board ...
More questions there. I await your reply. Thanks in advance.
Congratulations on 9 May.
N.
P.S. Comp magnified my Leningrad-128 + TRDOS + Lprint III. Soon
going to buy a PC over a standard / new / Tidy.
P.P.S. I write in this envelope because other
envelopes, no ...
19.05.2000
Dear N!
1. Indeed, Create soft'ovsky
controller is no longer available. Scheme
powered ZX-F № 5 differs from the circuit serially produced by
Max Romanov products. They stood RT11 (the infamous 556
series). So that the finished board unlikely to help you. In
addition, if too issue fee, and then fill them too
need (ie, trade in manufactured goods), because the price
difference is minimal. In addition, the planned output MKEY, -
Why duplicate articles? Respect where you can order an
interface or bare board, of information do not have.
2. Can emulate, but not necessary. The resulting device
would be inconvenient to work, although Popayán, of course,
nice. Mouse generates pulses of the shift up / down
right / left [???]. Only 5 wires
as in a joystick. But the problem is that
for the formation of pulses necessary
move the mouse. Therefore, the programming interface, which
serves the joystick does not take into account that the
constant movement on any of the 4-way counter a mouse
interface (hardware mouse) - it would go away
with a rug. It is a trifle escape the attention of those who
are puzzled by the joystick mouse emulation. As the saying
goes, well where we do not ... Try it - see for yourself. The
scheme is elementary. If you can not able to reproduce it, then
"picking" in a computer you are strictly contraindicated.
3. Thank you for your congratulations.
4. Apparently, this complex, which was issued by "Skim" when
projected KAY (1992-93 gg.). It seems that the machine works so
far.
5. Quite a decent envelope. Is
worse, (but rarely), - send Homemade
envelopes.
(C) Nemo.
