Se encontraron 7 coincidencias

por Pio
09 Abr 2018, 12:48
Foro: Core ZX Spectrum
Tema: Is EXP24 the latest open source core?
Respuestas: 10
Vistas: 12107

Re: Is EXP24 the latest open source core?

I found a repository on github that is supposed to be a mirror, it looks like it has the common directory in the exp25 folder!

https://github.com/sadman/zxuno-mirror
por Pio
12 Ago 2017, 13:11
Foro: General / Uncategorized
Tema: Spartan 6, 5V tolerance and PS/2 Keyboard
Respuestas: 8
Vistas: 9495

Re: Spartan 6, 5V tolerance and PS/2 Keyboard

I have just tested this with a new keyboard CIT KB-2106C, a USB keyboard with USB to PS/2 adapter. It works and the voltages are around 4V, just under. I will use this from now on.
por Pio
10 Ago 2017, 12:54
Foro: General / Uncategorized
Tema: Spartan 6, 5V tolerance and PS/2 Keyboard
Respuestas: 8
Vistas: 9495

Re: Spartan 6, 5V tolerance and PS/2 Keyboard

azesmbog escribió:Умные люди ставят защитные стабилитроны и не задумываются о проблемах электромиграции...
Using the BAT54S tied to 3.3V and ground looks like a good way to protect the Spartan 6 i/o pins.
por Pio
10 Ago 2017, 12:22
Foro: General / Uncategorized
Tema: Spartan 6, 5V tolerance and PS/2 Keyboard
Respuestas: 8
Vistas: 9495

Re: Spartan 6, 5V tolerance and PS/2 Keyboard

I will copy my answer from Facebook here: PS/2 devices connecting to a host are assumed to be open collector, so they either pull the signal to 0V or float. PS/2 pins at the FPGA are internally pulled up to Vccio (3.3V). A proper PS/2 keyboard should not pull up their outputs to 5V, as this is done...
por Pio
10 Ago 2017, 01:28
Foro: General / Uncategorized
Tema: Spartan 6, 5V tolerance and PS/2 Keyboard
Respuestas: 8
Vistas: 9495

Spartan 6, 5V tolerance and PS/2 Keyboard

Hi, I have seen a couple of threads on the ZX Next forums discussing the issue of the Spartan 6 not being 5V tolerant. I noticed a while back the we have 510 ohm resisters on the inputs of the ps/2 keyboard on the ZX Uno and no further level shifting. I measured the the voltages either side of R8 an...
por Pio
22 Nov 2016, 16:48
Foro: Preguntas y peticiones / Questions and requests
Tema: Creating mcs file
Respuestas: 22
Vistas: 16065

Re: Creating mcs file

Hi Antonio, thanks for the information. I could not get iMPACT to use the recovery.bit file so I used promgen to generate a recovery.mcs file, I have now flashed the FLASH.ZX1 and it is working!
por Pio
22 Nov 2016, 14:43
Foro: Preguntas y peticiones / Questions and requests
Tema: Creating mcs file
Respuestas: 22
Vistas: 16065

Creating mcs file

Hi, I have just finished building a zxuno board it seems to be ok as I tried flashing the prom with just the test23 core and I see the initial screen waiting to load the BIOS. However I cannot find the generamcs_multiboot_Q32.bat file in the repository, so cannot create the prom.mcs file. Can someon...