Hunchback for VideoNuLA (16 colours)

reminisce about bbc micro & electron games like chuckie egg, repton, elite & exile

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RobC
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Hunchback for VideoNuLA (16 colours)

Postby RobC » Mon Oct 02, 2017 4:05 pm

I've been playing with the sprites in Hunchback today and so here's a VideoNuLA version using 16 colours.

I've tried to make it look a bit more like the arcade version but my artistic limitations prevented too much of an improvement!

This was a bit more complicated than Dare Devil Denis as some of the flashing colours were used to identify enemy objects.
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hunch16.zip
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paulv
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Re: Hunchback for VideoNuLA (16 colours)

Postby paulv » Mon Oct 02, 2017 5:25 pm

That looks awesome :D such nice colour choices really give it depth. =D> =D> =D>

I still can't get past screen 3.... any chance of fixing that for me? :lol: :lol:

Paul

RobC
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Re: Hunchback for VideoNuLA (16 colours)

Postby RobC » Mon Oct 02, 2017 5:35 pm

Thanks Paul.

Hunchback was possibly the first game I bought for my BBC (probably in early '84) and I remember my friend's brother saying the graphics were "rubbish" compared to the arcade version. It's only taken me 30-odd years to put it right :D

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paulv
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Re: Hunchback for VideoNuLA (16 colours)

Postby paulv » Tue Oct 03, 2017 5:54 am

The first time I saw Hunchback was on my cousin's Oric-1 on a little black and white portable TV in 1983. I was hooked. A month or two later, I got my Beeb for my Christmas present that year which for a 9 year old, was the biggest and best present ever. Mind you, it'd still be one of the best Christmas presents ever if I got one this Christmas and I'm 43 with 5 Beeb's to my name :lol: :lol: :lol:

RobC
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Re: Hunchback for VideoNuLA (16 colours)

Postby RobC » Sat Oct 07, 2017 4:13 pm

Seems like we got our first Beebs at the same age and time :)

Playing this on a real machine today, I realised that I'd forgotten to set the VideoNuLA palette for colour 8 and this caused flashing blocks around the lives counter. B-Em doesn't seem to have this issue for some reason.

Anyway, here's the corrected version (with some slight modifications to the sprites that I'd made in the meantime).
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kieranhj
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Re: Hunchback for VideoNuLA (16 colours)

Postby kieranhj » Sun Oct 08, 2017 7:47 am

RobC wrote:Playing this on a real machine today, I realised that I'd forgotten to set the VideoNuLA palette for colour 8 and this caused flashing blocks around the lives counter. B-Em doesn't seem to have this issue for some reason.

Ah, I must have misunderstood how flashing colours are handled on NULA. Let me take a look when I’m home and I’ll send you a note about what I should be seeing with the earlier ssd and any clarifying questions.

RobC
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Re: Hunchback for VideoNuLA (16 colours)

Postby RobC » Sun Oct 08, 2017 1:17 pm

kieranhj wrote:Let me take a look when I’m home and I’ll send you a note about what I should be seeing with the earlier ssd and any clarifying questions.

No rush - I still need to get my head around exactly what the issue is.

Let me see if I can pin down a test case - might be a little while as I'm looking at getting my Flex port running on the GoSDC.

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kieranhj
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Re: Hunchback for VideoNuLA (16 colours)

Postby kieranhj » Mon Oct 09, 2017 11:32 am

RobC wrote:No rush - I still need to get my head around exactly what the issue is.

Let me see if I can pin down a test case - might be a little while as I'm looking at getting my Flex port running on the GoSDC.

Thanks, that would be helpful. Maybe I can also get around to implementing the sub-byte scrolling at ABUG. Seems like a good opportunity to get the details right whilst we're in the same room!

RobC
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Re: Hunchback for VideoNuLA (16 colours)

Postby RobC » Mon Oct 09, 2017 11:40 am

Just found what I think is a simple test case for the B-Em palette mapping issue:

Code: Select all

10 ?&FE22=&40:REM Reset VideoNuLA
20 ?&FE22=&11:REM Change palette mapping mode
30 MODE 2
40 FOR I=0 TO 15
50 COLOUR I
60 PRINT "HELLO"
70 NEXT


On running on real hardware, the display shows "HELLO" in colours 0-15 (so with colours 8-15 flashing).
However, on B-Em, colours 8-15 don't flash, they are displayed as solid colours instead (so colour 8 is solid black).

This is why the background to the Hunchback lives counter (colour 8 ) flashed black/white on real hardware but not on B-Em.

Sorting out the scrolling at ABUG sounds like a good idea...


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