Discussion about ZX80 / ZX81 Software
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Moggy
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by Moggy » Wed Dec 20, 2017 8:08 pm
Last edited by
Moggy on Wed Dec 20, 2017 10:38 pm, edited 1 time in total.
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Moggy
- Posts: 1611
- Joined: Wed Jun 18, 2008 2:00 pm
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by Moggy » Wed Dec 20, 2017 9:23 pm
Just an observation.
Saved some BMPs resized via windows paint (successfully) but when it comes to displaying them on the zeddy they are upside down!?
Yes I know the answer is to flip them before saving but was just curious as to why?
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siggi
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- Location: Dauernheim, Germany
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by siggi » Wed Dec 20, 2017 9:51 pm
No, not always, but usually
There is a bit in the header, which indicates, whether it is up or down.
I once wrote a program to convert Zeddy Hires to BMP and set this bit different than usually. Thus I did not need to mirror the HIRES picture, but the PC programs (Firefox or similar) show the BMP correctly even when it is not upside down
Siggi
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mrtinb
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by mrtinb » Wed Dec 20, 2017 10:10 pm
I have tried your great software on real ZX81 and I can happily report that it works with:
- UDG 4 ZXpand/ZXblast with set jumper to CHR$128
- ZXblast
To get it working on ZXblast:
- REM out line 40 LOAD "BMPS/"+B$+".BMP;32768"
- REM out line 9994 LLIST "M=L"
- When loading press L to load.
- Enter ZXblast loader with Double-Shift-L.
- Select BMP and append ":32768" and N/L to load.
- Press N/L back at the filename prompt.
Martin
ZX81, Lambda 8300, Commodore 64, Mac G4 Cube