Estoy pensando adquirir el DIVIDE

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Re: Estoy pensando adquirir el DIVIDE

Notapor lmdiaz1 el Lun Jul 29, 2013 11:31 am

Pues yo no tengo ni idea de todas estas cosas tecnicas porque sera mi primer DIVIDE el que me haga Flopping, que ya compré en ebay hace muchos meses el adaptador IDE para un tarjeta SD
Animo Flopping a por ello
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Re: Estoy pensando adquirir el DIVIDE

Notapor Spezzi63 el Vie Abr 20, 2018 5:15 pm

Hello,
I think it is important that I communicate here:
I have allowed myself to build the Divide 57d4. I want to run it on the Spectrum +2A.
Components under the Rom are equipped. However, no joystick adapter.
Back smd IC is equipped. Jumper for TK90X is closed.
Gal's are the A, XM and XR. LEDs have the right type.
It starts with a black and white striped image and some red blocks above, does not change even if the EP-Jumper is open.

To make no mistake to the review, I have the same way the Divide 57d3 set up with completely new components.
Unfortunately the same result.

If someone has this hardware running, give me a hint what I did wrong.
Best Regards,
Günter
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Re: Estoy pensando adquirir el DIVIDE

Notapor JULIO el Mar Abr 24, 2018 11:47 pm

Hello.
I do not have the special version for TK90X, leave the jumper open and try again, spectrum +2A isn't a (illegal) Brazilian Clone.
And another very important question, please make a deep clean of expansion bus.
regards.

semos internacionales... :lol:
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JULIO
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Re: Estoy pensando adquirir el DIVIDE

Notapor Spezzi63 el Mie Abr 25, 2018 12:21 am

Hello,
Thanks for the sympathy but unfortunately there is no change in the behavior :(
It does not appear the mode to flash the eprom.
Best Regards,
Günter
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Re: Estoy pensando adquirir el DIVIDE

Notapor JULIO el Mie Abr 25, 2018 10:29 am

Hello.
Under the eeprom socket two diodes and a 10K resistor are required.
But this image should help you.
Taken from version d2 in velesoft web page:
These versions d2,d3...d4 are special for brazilian clones TKs, for +2a works with less components.
Imagen
(please resize the caption) this message board do not fit the images.
With the info taken from version d2 and laters...
For the spectrum +2A/B +3 the config of some jumpers:
CLOSE JP1
CLOSE JP2 FOR ENABLE FLASH FIRMW IN EPROM
CLOSE JP3 this are only for +2A/B +3
if you use +3e ROMS in the +2A/B +3 ...CLOSE JP4 & JP6
if not leave OPEN.
For +2A/B +3 only:
don't solder D5(1N4148),D6(1N4148), R16(220R)
(please fit to page) or "save img as"
Imagen
...version d4 are UNTESTED by the autor.
Hope you find this info usefull.
You do not get offended, because it is difficult to express myself in a language that I do not master to perfection.
The author of the page is a very friendly and helpful person, write directly to him, who will be able to help him for sure.
He has helped me with many doubts, I have always managed to fix the problems I had writing to him.
regards
Julio.
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Re: Estoy pensando adquirir el DIVIDE

Notapor Spezzi63 el Mie Abr 25, 2018 5:45 pm

Thank you for your efforts.
I wrote to Velesoft a few days ago but still have no answer.
Maybe he is on vacation but I have to wait.
This 4K7 resistor is still a mystery to me (only for ZX without UVY pins).
I searched again for errors on the boards but found none.
May be that this version of the DivIDE is not made for my + 2A ;)
Imagen
Imagen
Best regards,
Günter
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Re: Estoy pensando adquirir el DIVIDE

Notapor JULIO el Jue Abr 26, 2018 1:32 pm

Hello.
How have you checked for errors?
The recommendable thing is:
-check Z80 in +2A pcb, M1 line.
-test soldered resistor values.
-correct orientation of capacitors with polarity and transistors.
-remove trs and check transistors off pcb.
-check and verify that jumper switchs really close the jumpers. use good jumper switchs.
-Remove all the components in socket.
-check again TTL components off pcb.
-check SRAM off pcb.
-verify GAL with programmer.
-use a programmed EPROM 2764 with standalone programmer off pcb and with permutor contents of TBIOS or EEPROM in 28c64 socket.
-Deep cleaning with isopropyl alcohol of pcb.
-Drying with compressed air of pcb.
-Check the solder points for short circuits or poor solder in some places.
-Open circuit editing program (e a g l e ) and use a multimeter checking line by line from the expansion bus. HARD, BUT NECESSARY
-Check the solder points for short circuits.
It is possible that the printed circuit board has a manufacturing error.
regards
Julio.
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Re: Estoy pensando adquirir el DIVIDE

Notapor Spezzi63 el Jue May 03, 2018 12:06 am

Hello,
I have now used all the needed parts of the 57d3 board for a 57c board and everything works right now.
The gals of the 57d3 board were compared to a programmer, all ok.
A new board was used to recreate the 57d3 which does not work.
Unfortunately it turns out that this version 57d3 is not executable on the Spectrum +2a.
As long as no one has a proof to the contrary I must warn against trying the replica of the 57d3 for a Spectrum +2a.
The 57d4 will probably not work for the same reasons.
Do not waste time and money on this design.
Best regards,
Günter
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Re: Estoy pensando adquirir el DIVIDE

Notapor Spezzi63 el Sab May 05, 2018 4:52 pm

Aquí hay una pantalla actual del 57d3:
Imagen
Saludos cordiales,
Günter
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