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11.5.12 CENTurbo II B - last fitting
CENTurbo II B - last fittig
CENTurbo II B HARDWARE INSTALLATION PROCEDURE Author : Rodolphe Czuba - rczuba@home.com
Realised with PAPYRUS on F030 + CT2B * 2000, February - Rodolphe Czuba PLEASE, BEFORE YOU DECIDE TO PRINT ON PAPER THIS FILE, ASK YOU IF
YOU COULD NOT AVOID THAT ! READ THIS FILE ON THE SCREEN IN NORMAL CT2
MODE ! REDUCE THE PAPER CONSUMPTION OF THE PLANET ! THINK ABOUT OUR
PLANET FOR THE NEXT GENERATIONS OF PEOPLE (your children) AND THE
ANIMALS WHO NEED FORESTS, EVEN IF YOU THINK YOU DON'T NEED !
You have now in your hands the most polished item proposed for the
Falcon.
The CENTurbo II took 18 months of conception, design, tests and
the 'know-how' of Rodolphe Czuba to finally achieve this goal which
many said would be impossible.
Also, we would like to thank you for the confidence you had when
you bought this product. We're hoping this product will satisfy you
completely. We are open to any question, suggestion or remark that
could improve this product in any way possible. To contact the author
: rczuba@home.com
YOU MUST READ THIS !
** Skills required ? **
Read this documentation through to the end before starting
anything. This documentation has been written in such a way that the
hardest parts are first. So if you don't feel confident in doing it
yourself, don't even start. Just contact CENTEK to agree on the
shipping of your mother board and installation of your CENTurbo II.
ATTENTION: CENTEK's bill installation is at a fixed fee, no matter how
far you have started the installation! If once installed and have
checked your work several times, your Falcon still doesn't work,
CENTEK will have to decide, in all honesty, if the problem comes from
your first try or not. If it was from your side, a 400 FF fee (without
parts) can be requested in order to fix your Falcon. If any doubt
while reading the documentation, please use the CENTEK HOTLINE open
from 9 PM to 11 PM.
Abbildung 1 - CT2A Beschleuniger
** Precaution **
Many components of the CT2 are sensitive to static electricity:
avoid touching the card and especially the pins of the components and
connectors. Hold the card by the edges. Please make sure your body is
discharged of static electricity, example, touch a metallic object
that is in contact with the ground (faucet for example), the best
would be to touch a metal chassis (without paint) of an electrical
appliance connected to the ground (toaster for example). Be careful
with carpets and synthetic clothes... Don't walk barefoot on the
carpet.
** Warranty **
The CENTurbo II is life time warranted. However CENTEK can reduce
or even cancel this warranty if the product hasn't been used or
handled correctly. NO solder is needed on the CT2 card for the
installation. There are however 2 solder joints on the forward left
corner of the card to connect a TURBO MODE LED if you have your Falcon
in a tower. Any solder work made on the CT2 other than the LED will
immediately cancel the warranty.
** Tools **
- Phillips screwdriver.
** Orientation **
The instructions and other placement indications are to be
visualized and followed as if the mother board was in front of you, as
if you were using the computer.
** Undoing the Falcon **
Flip over the machine, undo the 7 screws from the case and the 3
long ones from the floppy drive. Flip the machine over again and
remove the case. Undo the power supply cover screws. Undo this cover.
Disconnect the floppy drive. Undo the 2 screws from the legs of the
power supply, then remove the power supply along with the connector.
Undo the screws of the cover remaining (all along the mother board),
you will then bend the little tips straight up in order to remove this
cover. Disconnect your memory card.
** Preparing the mother board **
If a CENTurbo I is installed, you need to remove it, as well as
all the wires connected to it. Some of the following procedures won't
need to be done since they were already done.
With a cutter, remove the old CPU 68030 from the mainboard (see
figure to localise the CPU). BE CAREFULL to not touch the mainboard
and tracks with the cutter ! Use the border of the CPU case to guide
your cutter. Remove with the iron solderer the rest of the pins that
are yet on the mainboard's contacts. Verify, with a magnify if
possible, that there is no short-cuts between two contacts.
With the thin cutting pliers or utility knife, cut then bend up
slightly the pins 3 and 4 of the ACIA 68B50 (U24) near the MIDI
sockets, same operation for the keyboard ACIA (U52) close to the left
of the keyboard connector.
Locate the SDMA (U36) (hint: where the floppy drive was). Cut the
track that goes to the second (not number 2 !) pin of the SDMA (see
picture). On the right side of the track, scratch the varnish (2 mm
long) until you reach the metal, then tin it. Take the resistor of the
package and cut the pins at 5 mm from the body. Solder it between the
pin of the AJAX chip and the track of the SDMA like on the picture.
Locate the DSP (U38) (hint: where the floppy drive was). Cut the
track that goes from the (big) hole far right of the 32MHz clock (U37)
(left of DSP) to the DSP. (see picture). The cut has to be as near as
possible of the hole, and the length has to be at least 1 mm. On the
right side of the track, scratch the varnish (2 mm long) then tin it.
Locate the video chip 'VIDEL' (U34). Locate the pin 14, counting
to the left from the right back side. In front of this pin, there is a
metallic hole connected to this pin. With the tip of the utility
knife, scratch the varnish until you reach the metal, then tin it. Be
Careful with the videl.
If you have a FPU installed in the falcon, you need to remove it.
If you don't have PLCC extracting pliers, use a small flat screwdriver
as lever on the 2 opposite corners of the socket.
If you have an IDE disk drive, leave the ribbon cable on the
connector of the mother board. Count starting pin 1 (forward) and
locate the 23rd and the 25th wire (use a marker) of the ribbon cable
(falcon side). With your utility knife, separate the wire 23, and the
wire 25 from the others for about 2 cms long (starting from the
connector, falcon side). Cut those wires (23 and 25) as close as
possible to the connector. You need to strip the insulation of the
wire 23 and 25, then tin them. NEVER unconnect the ribbon cable from
the ribbon connector or your will have bad contacts!
Cut as close as possible to the mother board the left pin of L102
which is located next to the NVRAM. Bend it (see picture) and tin it.
If it wasn't done already, remove the resistors or solder bridge
on R221 and R222 on the right side of the CPU (see picture). If there
is a solder bridge or there is no resistor on R216, you will need to
place one there (after removing the eventual bridge), using the one
furnished on this paper. Without this resistor on R216, the CT2B may
not work correctly ! Be carefull that the track around the R216 place
is not cut !
Locate on the left side of the mother board the 2x8 contacts
referenced as U46. Unsolder the 4th contact (starting from the left)
and solder the 3rd contact (see picture).
Remove from their sockets, the 4 chips 2x10 pins U62, U63, U67 and
U68 (towards you on the mother board). Those won't be used anymore.
Remove from its socket the chip 2x12 pins U44 (near the DSP) and break
the pin 15. Tin the pin 15 of the socket (be careful with the
plastic).
With the black wire, cut 2 small wires of 2 cm.
Install the switch on the left side of the Falcon case between the
cartridge port and enhanced joystick ports. To do so, make a 6mm
diameter hole (scissors or drill). Position the switch in such a way
that it will switch from HIGH or LOW (vertical way).
Solder a short pin of a 33 ohms 1/4 W resistor
(orange/orange/black/gold) in the right hole of U37, the place of the
DSP 32 MHz oscillator (see the DSP figure). Cut the other pin of the
resistor as short as possible and solder a thin wire (black wire
furnished in the last packages only) between this pin and the hole of
the pin nr14 of the VIDEL. This wire MUST be as short as possible,
straight, and not in contact with the mainboard ! Use the forward
plastic border of the mainboard floppy connector to fix the wire in
the best straight position. Software remark : you should turn always
OFF the 'External clock' setting in the set-up F7, when using the CT2.
** Ribbon cable **
Place the ribbon cable on a piece of a hard cardboard, and
separate using the utility knife the wires until the connector. Then
cut the wires at the length required (as shown on the diagram), strip
the insulation of the wires (2mm) except the ACIA wires (4mm). Twist
them together then tin them.
You then need to solder the 16 wires of this ribbon cable starting
by wire n1, finishing by the wire n16. Some wires will need to be
secured on the mother board with some adhesive tape. Be careful in not
having wires crossing (especially near the connector), the ideal would
be to have all the wires parallel to each others.
FOLLOW THESE RULES:
Before inserting your FPU in the CT2 FPU socket, check its speed
written on the chip (68882FNxx). The following versions react
differently at 50MHz:
You now need to insert the CT2 on the Falcon bus. For this you
need to place the card over the bus first to see if it is aligned
correctly. Then apply an equal pressure with your left thumb on the
solders of the left female connector and your right thumb on right
female connector in order to fully insert the CT2. Attention: don't
apply pressure on any of the CT2 components. Insert the connector of
the ribbon cable in the right side of the CT2. Insert, if not done
already, the SIMM in the socket.
If you have the gray ATARI VGA adaptor and if you don't have a
multisync monitor, some extended video modes with the external clock
at 32 MHz won't be possible without modifying this adaptor (which is
bugged !). You need to flip it and cut with the utility knife into the
plastic, a 1cm wide strip on the whole length and at 4mm of the
metallic border. After this you can access the inside, you separate
the pin 15 from the pins 11 and 19. Move aside the 2 wires connected
to pin 15, cut them as close as possible to the pin and connected them
together. If you don't want to do this hack, you can get 2 DB19 (male
and female) that you will solder (direct cabling) without connecting
the pin 15 (cut them). This little adaptor will be inserted between
the Falcon VGA port and the gray ATARI VGA adaptor.
The installation is done. Put the machine back together and boot
it with the switch on the LOW position (NORMAL mode). If the computer
works, copy on your hard drive the file from the installation floppy,
then decompress it. Then, flip the switch (TURBO mode) and press the
RESET:
** Thermic aspects **
The CT2 are equipped with heatsink + fan, stuck to the CPU with
thermical cyanoacrylate glue. Don't try to remove this block or you
will damage the CPU ! This block has been glued in a position that
won't bother the keyboard (if still using the original case). An 3 1/2
inch IDE hard drive will remain between the power supply unit and the
floppy drive, but far behind and along the CT2 heat dissipater. If you
have a 2 1/2 inch IDE HDD (65, 80 or other capacity), you have to cut
the left forward pin of the metal bracket and remove the four screws
(two on each side of the HDD). Then screw again the bracket on the
motherboard and stick (double-faced adhesive or glue) the HDD on the
bracket at the far behind position.
ATTENTION: if using the original Falcon case, it is necessary to
keep the motherboard fan running.. If you think it is still too noisy,
you can reduce its speed in adding a 47 Ohms resistor in the red wire.
We even recommend (sometimes really needed) to add a third fan
which will expel the hot air from the casing out. This fan has to be
installed near the power supply unit, which is one of the first reason
of this hot air. The ideal would be to cut the shape in the case then
glue it on the left side. Or another solution, faster but not as
efficient, place the 3rd fan between the power supply unit and the top
case. Never put some objects like papers on the top case !
** COPYRIGHTS **
The CENTurbo II board has necessitated many hours of study and
design to achieve a viable product. The CENTEK Company cannot
therefore be held responsible for any dysfunctioning or
non-functioning of the CENTurbo or/and the computer: no exchange nor
replacement of the CENTurbo will be made at CENTEK's cost, unless
otherwise indicated.
Paragraphs 2 and 3 of Article 41 of the Law of 11 March 1957 only
authorises "making copies or duplicates for the strictly personal
use of the copier and not for collective use" or analyses and
short quotations serving as examples or illustrations: "any total
or partial representation or reproduction made without the consent of
the authors or their descendants or beneficiaries is illegal"
(Article 40, Paragraph 1). This representation or reproduction,
whatever form it may take, will constitute a forgery punishable
according to Articles 425 and the following of the Penal Code.
CENTurbo is a registered trademark of CENTEK.
The other trademarks mentioned have been registered by their
respective owners.
DOCUMENTATION OF THE CT2 February 2000 - Rodolphe Czuba PLEASE, BEFORE YOU DECIDE TO PRINT ON PAPER THIS FILE, ASK YOU IF
YOU COULD NOT AVOID THAT ! READ THIS FILE ON THE SCREEN IN NORMAL CT2
MODE ! REDUCE THE PAPER CONSUMPTION OF THE PLANET ! THINK ABOUT OUR
PLANET FOR THE NEXT GENERATIONS OF PEOPLE (your children) AND THE
ANIMALS WHO NEED FORESTS, EVEN IF YOU THINK YOU DON'T NEED !
Material overview :
The CT2 offers two modes: NORMAL and TURBO. The NORMAL mode
permits to keep a Falcon 100% as origin, except that the DSP IRQ is
not wired (see below).
The small following chart gives features (in MHz) of the 2 modes.
NORMAL TURBO
CPU 16 50
BUS 16 50
FPU 32 50
DSP 32 50
Fast-RAM no 50
VIDEL (Int) 32 50
VIDEL (Ext) 32 32 (with hardware fitting last manual)
The CT2 contains what is called 'the DMA' modification destined to
CUBASE AUDIO. This last works perfectly in TURBO mode !
The TURBO mode is possible in VGA resolution, but also in RVB and
MONO ST (SM12x/144) thanks to the attendance of a 32 MHz clock on the
EXT entrance of VIDEL, the SETUP being in charge of commuting the
VIDEL on this External clock after having detected a RVB screen or
SM124. It is possible to DISABLE this External clock from the SETUP if
you are in TURBO and with a small software in the AUTO directory if
you are in NORMAL mode (EXCLKOFF.PRG).
Two things differentiate a Falcon from an another with a CT 2 in
NORMAL mode :
Software overview :
On the CENTurbo II, it is possible to start several ways:
- NORMAL mode.
(x means 1,2 or 4 according to your TOS)
*** NORMAL mode ***
In this mode, you keep an original boring slow Falcon...
*** TURBO mode under TOS 7.0x ***
It is the standart CT2 TURBO mode. You have to use it if you want
to boost your Falcon !
This is a TOS 4 (don't be afraid by the number 7 !) that was
modified to correct some errors of the original TOS, install the
FAST-RAM and propose some options via the set up. The available
options in the SETUP are taken in account in the launching of this
one.
With this boot, the FAST-Ram is declared to the system, the TOS is
copied in Fast-Ram, the keyboard reset works ( as well cold or warm
boot ).
The boot is made with the internal driver (Cecile) or external (if
it works in turbo!). The boot looks first for a bootable hard drive in
the order declared under the setup. Then, 2 cases are available with
Cecile or external.
With the internal Cecile, the boot looks on the partition started
for a possible CECILE.SYS that contains some complementary information
(boot partition, energy economy mode, speed...) and start the system.
If there is not started partition, the boot is made on the value in
the setup (that can take time!).
In the case of an external driver that works and reachable by the
system (beware of big capacitie SCSI disks ), the boot partition is
validated by this driver and the boot will be made on it.
with this mode, you can really start on the partition of your
choice with the original desktop.
It is necessary to possess a graphic accelerator (NVDI, MAGIC,...)
to run the system. Modifications brought to the TOS 4.0x to make a TOS
7.0x don't go until the integration of all graphic routines without
the utilization of the Blitter. YOU NEED NVDI (2.5, 4.11 or 5.x) or
MAGIC to use FAST-RAM !
This mode is dummy and only for testing some curious softwares !
Don't use it for regular use of the Falcon (or you were stupid to buy
a CT2 !) : there is no FAST-RAM, even if the ram test sequence
indicates a 'dummy' not physical FAST-RAM that is coming in reality
from ST-ram ! In this mode the speed is very slow if compared with the
TOS 7 (FAST-Ram)!
In this mode the setup is available but doesn't permit to select
the options that are available in the TOS 7.0x. The only available
option is the choice of the TOS 4.0x launching.
Under TOS 4.0x, THERE IS NO ACCESS TO THE FAST-Ram and the reset
blocks the machine because the TOS can't start in Turbo : it is
necessary to make a hard reset (push the button) to start again the
machine.
Note that TOS 4 mode allows you to use the Falcon without the NVDI
or MAGIC (so , WITH the BLITTER ON) because there is no Physical
FAST-RAM. In this manner you have time to find a NVDI or MAGIC...
Software installation of the CT2
PATCHES for SOFTWARE
We kindly furnish some patchs for software that had problems to
run with CT2 (especially because of the speed with the FAST-Ram).
You should read the documentation in the 'PATCHS' folder.
SCSI transferts / AUDIO setting
When the Turbo mode is running you have to check the SCSI
transferts. It is the same procedure than with IDE HD. Firstly use
CC-TOOLS to test. After, check a copied big ZIPped file (at least 5
MBytes) from the IDE to the SCSI in 640*480 TRUE COLOR mode (important
to respect this configuration : CENTscreen is already installed !). If
there is no error, you can think that the SCSI is OK.
If not, be sure that the SCSI chain is correctly set :
Follow this point seriously because a major part of the vendors
don't know the SCSI rules and install SCSI material inside case/box
without to remove the original terminator on the peripheral. If there
is more than the chain's end terminator, the data transferts could be
altered even if they were good in normal mode several months ago !
The AUDIO quality has to be listen : check for crackles with
official good software (not demos or stupid mod players that may badly
programmed !).
If you have problems with SCSI and/or AUDIO, you have now to
modify a hardware setting ON the CT2 :
There is 4 squared pads before the CPU of the CT2 just between 2
small 14 pins chips. The 2 left pads are connected together by a very
small track. You have to cut this track and put a solder jumper on the
two right pads. You have now a new SDMA timing and have to do again
all the SCSI and AUDIO tests.
Note that this modification and the add of a HE14 connector on the
left forward corner of the CT2 to light a panel led, are the only ones
that cannot cancel the warranty.
If the problem stills to be, please contact Rodolphe Czuba :
Compatibility
The list of software tested here is not exhaustive. If a software
is not present, it is sufficient to know some rules to know if it will
be capable to work under the aforementioned modes.
First of all It is necessary to distinguish software that function
on all TOS (and therefore on all Atari) and those specific to the
Falcon.
In the first case, the most work if they respect the elementary
rules of programming (using only system functions!).
We can also distinguish software functioning on the TT, because
they are almost-guaranteed to work under TOS 7.0x.
In case of doubts, it only needs to know if it runs normally on TT
or Falcon before going farther.
As for software functioning on Falcon, the main problem will come
from the few of consideration of the system. Some software audio not
having already foreseen to function on something else than a basis
Falcon (without turbo), there won't be a miracle on an as fast board
as the CT2. The second big problem, is the management of the FAST-Ram.
If no distinction is made, we can be in front of a screen in Fast-Ram
that won't be seen, or AUDIO buffers giving the same problem than the
graphic routines of the TOS with the Blitter. You're driving to a
system crash...
Be careful not to abuse the passage of all the programs in
Fast-Ram. May be they are already well configured !
The last point it is the acceleration of the CPU in relation to
the DSP that can bring problems to software conceived on a too much
tighten timing (Basis Falcon).
FAQ - Frequently Asking Questions
Here are some questions that you can put yourselves (especially if
you didn't read the DOC! ). Let's recall that the reading of the
documentation is INDISPENSABLE ...It will make you win a lot of times
and will prevent you from putting your configuration upside down. (And
especially that permits us to do not still answer to the same
questions!)
Copyright © Robert Schaffner (support@doitarchive.de) Letzte Aktualisierung am 23. Dezember 2003 |
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