Playing ZX Spectrum in HDMI in MAX1000 support SDHC 32Gbytes

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Playing great new games:
https://itch.io/s/111036/full-pat-morita-pack

Capture playing Shovel Adventure:
https://youtu.be/uP6nl9aS-cw

New 4Mbytes Sdram to Sram Wrapper:
https://github.com/AtlasFPGA/zx/blob/main/atlas.max/sdram.v

New DVI/HDMI Wrapper in verilog:
https://github.com/AtlasFPGA/zx/blob/main/atlas.max/hdmi.v

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And playing some new demos:
"Elysium State"

"In Color by Darklite and Offence"

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Tutorial, how to port some VHDL opensource cores from reverse U16 - Spanish - you can use translation.

It is a great excersise to knwo how to deal with the VHDL program language and you can see it here.

In next videos I'm going to share how to deal with the serilizer, because MAX10, has a diferent serializer than cyc1000.

In this case i share the ZX48 implementation in VHDL as a .QAR proyect:
https://github.com/AtlasFPGA/U16_ZX_48_Spectrum_Reloj_50MHZ_VHDL

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Using an DVI signal in 24bit color an late runs a ZX Spectrum.

The demo is located here for CYC1000, adapt it to MAX1000, is fairly easy.
https://github.com/AtlasFPGA/Demo_PIOTR.GO_888_DVI

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This is the lines for using the DVI signal, the max 10 with a 55 nanometer achive the frecuencies of a DVI/Digital_video with no problem.

Code Select Expand

set_location_assignment PIN_H6 -to SYS_CLK
set_location_assignment PIN_H5 -to TMDS[0]
set_location_assignment PIN_K10 -to TMDS[1]
set_location_assignment PIN_H13 -to TMDS[2]
set_location_assignment PIN_J13 -to TMDS[3]
set_location_assignment PIN_K11 -to TMDS[4]
set_location_assignment PIN_K12 -to TMDS[5]
set_location_assignment PIN_J12 -to TMDS[6]
set_location_assignment PIN_L12 -to TMDS[7]

You can see the pin planner in the photo added.
It is a nice thing to have a 24 or 30 bit color scheme an consumes a very low count kles.
There is a screenshot also of the compiled piotr-go-vga, but consumes only 8 pins.
In order to reproduce a vga signal with 24bits.
You need:

8 Pins -> Red
8 Pins -> Green
8 Pins -> Blue
1 Pin -> Horizontal Sync
1 Pin -> Vertical Sync

This is the minimal signals you need in vga 8+8+8+1+1=26, but in a digital signal only uses 8 signals, the wrapper used could give 30bits but the implementation only gives 24bits, so 2 signals added for each RGB Color signals.
So for max1000 is more suitable a digital video signal.



You can see the impact in the utilization by entity of using a video signal compatible with DVI.