ZX-Uno

I´m always use a Xilinx cable with impact software or a SPI flash programmer before solder.
But recovery.bit use RGB signal, try press ScrolLock key to switch signal to VGA.
Yo can use also other .bit file for test board.

Thank for your fast help.
I try this .bit, still no any image on display and no any reaction on keyboard.
The only difference is now after bit uploading SD card red led is on.

What else i can test or measure with this .bit file?
And what file i must write direct to flash with programmer - the same recovery.bit?

Push on keyboard, the key 3 for VGA screen.
No sound ? this test flash red led and play sound (beep).

I´m use same recovery.bit but in RGB mode.

I try again - no sound, and no reaction on keyboard. Keyboard itself is good - i test it on PC.

I suspect something may be wrong with oscillator. But i not sure. Unfortunately i cannot measure frequency. Next days i try replace it.

Can i flash memory by external programmer without desolder it?
Please tell me what file i must to use.

Also i try to check VGA out and i see some hi levles on RGB signals after upload is finished. If i made reset levels disappear. Unfortunately i cannot see signals because my scope don't show fast signals.

HanSolo escribió:I try again - no sound, and no reaction on keyboard. Keyboard itself is good - i test it on PC.

I suspect something may be wrong with oscillator. But i not sure. Unfortunately i cannot measure frequency. Next days i try replace it.

Can i flash memory by external programmer without desolder it?
Please tell me what file i must to use.

Also i try to check VGA out and i see some hi levles on RGB signals after upload is finished. If i made reset levels disappear. Unfortunately i cannot see signals because my scope don't show fast signals.

Here you have a updated file of the complete flash.
https://github.com/ManuFerHi/ZXUNO_VGA_ ... /FLASH.ZX1

If the flash is soldered, you can only program it through the FPGA with the recovery. To program it with an external programmer it is necessary to desolder, but it is a very simple operation.

Hola foro
lo siento por google translite
pero no me digas si el BIOS admite 0.73 flash w25q256?
empujar todos los núcleos famosos de alrededor de 100 piezas (junto con máquinas recreativas)

tank_uk escribió:Hola foro
lo siento por google translite
pero no me digas si el BIOS admite 0.73 flash w25q256?
empujar todos los núcleos famosos de alrededor de 100 piezas (junto con máquinas recreativas)

Se puede colocar en la placa sin problema alguno, es fácil de soldar pero habría que hacer un firmware específico.

Hola q tal, aca termine de armar un zxuno vga 2m , le puse el firmware y parece estar todo bien, solo que no se ve nada en el VGA, alguna sugerencia para encontrar el problema?

¿Seguro que sólo te falla el VGA? Puedes comprobar si está funcionando comprobando por el audio que se escucha las pulsaciones del teclado.

Ok, reviso eso. Me olvide de decir que la placa que arme le hice unas ligeras correcciones. Solo le agrande las vias y acomode un poco los componentes entonces mejore el precio de fabricacion.