Core PC/XT TEST1 unificado (20170218)

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Quest
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Re: Core PC/XT TEST1 unificado (20170218)

Mensaje por Quest » 10 Abr 2017, 10:50

@bakoulis

No, that's not correct.

The core has not CGA compatibility. It only has MCGA/VGA 320x200x256 13h and EGA 320x200x16 12h, and modeX and 80x25 text mode.

The only "CGA" thing it has is the FONT. It is only 2k. The VGA font is 4k, and it was replaced to free some FPGA resources (mainly LUT Ram).
http://www.zxuno.com
ZX-Uno · Clon de ordenador ZX Spectrum basado en FPGA

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bakoulis
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Re: Core PC/XT TEST1 unificado (20170218)

Mensaje por bakoulis » 10 Abr 2017, 10:58

Before your comment, I thought the VGA modes was removed!
Try to choose the English translation at the first post of author and see what it translate!
The "google translate" makes the descriptions of cores like a nightmare.
Some day, all descriptions of cores must edited at pure English.

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brunosilva
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Re: Core PC/XT TEST1 unificado (20170218)

Mensaje por brunosilva » 10 Abr 2017, 15:01

Hi

but its not possible to implement cga? even in a cga only core? :)

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Uto
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Re: Core PC/XT TEST1 unificado (20170218)

Mensaje por Uto » 10 Abr 2017, 15:43

Implementing CGA is most likely possible, the question is who is going to do it :-)

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DistWave
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Re: Core PC/XT TEST1 unificado (20170218)

Mensaje por DistWave » 10 Abr 2017, 16:05

bakoulis escribió: The "google translate" makes the descriptions of cores like a nightmare.
Some day, all descriptions of cores must edited at pure English.
It's good to know. I will translate the release notes to english in future versions.
Uto escribió:Implementing CGA is most likely possible, the question is who is going to do it :-)
I did some little experiments before releasing this version but I have no time right now.

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brunosilva
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Re: Core PC/XT TEST1 unificado (20170218)

Mensaje por brunosilva » 10 Abr 2017, 17:03

Hi

I was just saying that because if it's not possible to add more recent games... maybe its possible to add more older games! :)

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brunosilva
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Re: Core PC/XT TEST1 unificado (20170218)

Mensaje por brunosilva » 17 May 2017, 02:30

@distwave - the core is at is best possible (with this fpga)? there are some games with small problems that could be corrected... i have hundreds of dos games and i was trying some... :)

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brunosilva
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Re: Core PC/XT TEST1 unificado (20170218)

Mensaje por brunosilva » 18 May 2017, 01:17

HI

I'm trying the games on the list that is on the other thread... and also trying other games...

I have some questions:
- from what i've seen there are 3 tested OS: PCDOS 3.1, PCDOS 7.0r1 and MSDOS 6.22 . The games were tested in which OS? Is the OS important for game run/do not run?
- If a game misses the lower part of the screen (back to the future 2), the problem is VRAM, like some games that doesn't run? how to solve? more ram in zxuno? bigger fpga? addon with something else?
- when a game does some flickering in the bottom (indy 500) or in the top (back to the future 3), the problem is also vram?
- how to know the graphic mode if the game doesn't tell us?

are this problems fixable or are we in the most optimized xt core?
image1.JPG
image1.JPG (133.58 KiB) Visto 3564 veces
image2.JPG
image2.JPG (199.34 KiB) Visto 3564 veces
Thanks

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Uto
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Re: Core PC/XT TEST1 unificado (20170218)

Mensaje por Uto » 18 May 2017, 09:42

The missing lines at the bottom are due to not enough RAM inside the FPGA, so only a larger/better FPGA can solve that. It's not possible to use board RAM (wether it is internal or external) for VRAM.

The only way to check graphic mode is run it in dosbox or a DOS PC machine, it's generally easy to identify if it's using VGA, EGA or CGA. Still, remember that some games were using non-standar VGA features (i.e. Pinball Fantasies) that are not supported by this core, so it may look like VGA/MCGA and then don't work at all.

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brunosilva
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Re: Core PC/XT TEST1 unificado (20170218)

Mensaje por brunosilva » 18 May 2017, 10:37

humpf :(

stupid idea: not possible to add an "external graphic card" connect to the expansion port? :)

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