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18 lines
699 B
Markdown
18 lines
699 B
Markdown
## Alternate firmware for ZXKIT1 VGA scandoubler for ZX Spectrum
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PCB: https://github.com/romychs/RGB2VGA
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* Low delay (one line)
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* Automatically adjust to input timings
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* Automatically detect input VSYNC(KSI), HSYNC(SSI) polarity. Supported schemes: V+ H+ and V- H-
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* Support for CSYNC (composite sync) input (should be connected to SSI input, KSI should be pulled hight)
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Jumpers:
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* INVERSE_RGBI - changes polarity of *input* RGBI signals
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* INVERSE_KSI - changes polarity of *output* VSYNC signal
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* INVERSE_SSI - changes polarity of *output* HSYNC signal
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* INVERSE_F14MHZ - changes edge of clock to latch input RGBI signal
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* VGA_SCART - no effect
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* SET_FK_IN - no effect
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* SET_FK_OUT - no effect
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