Pitfall

[Beebson]

For Circus Charlie, please check 64 and MSX versions as a reference what they have managed to put in. There´s also a clone for 64, called Big Top Barney. As being an early cartridge, I think the MSX version can´t be bigger than 16Kb. It manages some smooth scrolling without registers for hardware scroll, has hardware sprites, though. Vertically there were just small areas to scroll on MSX version.

Maybe you could make a mode 5 disk version, what loads every level from the disk, bringing 20Kb per level! Maybe a nearly arcade version with mode 1, loading 10Kb levels from a disk? Is 10Kb enough for Beeb for graphics and scrolling and movement for just one level?

[fizgog]

New video build

Added multiple screens
Added pits
Fixed wall showing on either left or right

NB Screen generator needs optimising to make it quicker to display

https://youtu.be/qt_iajdaIB0

Still to do in no particular order (which seems to be a long list)

Optimisation
Ponds / tar pits (including animation)
Swinging Rope
Snake
Scorpion
Crocs
Falling down holes
Climbing
Sound effects
Gold
Timers and score
NuLA support

[Rob_hawk]

Glad you got side tracked from the rope! Looking great running between screens

[lovebug]

looking great

are you using a random number generator to generate the objects for each screen like the original atari version ?

btw theres a commented disassembly of the original 6502 atari code over at https://www.romhacking.net/documents/521/ if you need

[fizgog]

looking great

are you using a random number generator to generate the objects for each screen like the original atari version ?

btw theres a commented disassembly of the original 6502 atari code over at https://www.romhacking.net/documents/521/ if you need

I’ve seen the document but found it too confusing
I’m using the Atari 2600 number generator but at the moment it’s only handling trees, ladders, pits and wall

[fizgog]

Managed to grab an hour of free time to implement the animated scorpion

https://www.youtube.com/watch?v=UDKFuTHogG8

[fizgog]

Added experimental Video NuLA support

https://youtu.be/BO81IzFUQAI

[Rob_hawk]

Scorpion and colours are looking good. It’s funny but I actually find your BBC colour scheme easier on the eye but great to have the Nula option as well for authenticity.

[Beebson]

You have a nice scorpion there! And nula looks good, too!

How many colours there are in nula palette?

[fizgog]

You have a nice scorpion there! And nula looks good, too!

How many colours there are in nula palette?

I think I only used a couple of NuLA colours to see how easy it was, I'll revisit later in the development cycle and use the correct colours, not some random ones I picked.

This version adds falling down holes and ladder openings into the underground

https://www.youtube.com/watch?v=NIFTWvTEKBA

[tricky]

Nice, keep 'em coming

[marcusjambler]

Looking great and so quick too

[Rob_hawk]

Another super update and great to see him jumping over the scorpion already!

[fizgog]

Added climbing
Added boot loader
Fixed going left and right in the underground (should jump 3 screens and not 1)

Another YouTube video to watch

https://youtu.be/UBRKeJ90_AU

[Rob_hawk]

Climbing looks great and love the loading screen. I guess that’s what the book was for a few weeks back?

[fizgog]

Climbing looks great and love the loading screen. I guess that’s what the book was for a few weeks back?

I still need to sort out the colour clash on the ladder and I wish I was good at designing gfx

Loading screen took me 30 mins

1. Find and save image from the web
2. Import into AcornPad
3. Tidy up
4. Export

[Beebson]

Thank you again.

[lovebug]

very nice

[Rob_hawk]

I still need to sort out the colour clash on the ladder and I wish I was good at designing gfx

Loading screen took me 30 mins

That's great to know re AcornPad for the loading screen - I must get Parallels up and running on my Mac for that as I think it's PC only?

I'm sure you'll figure out the clash when climbing - not quite Spectrum style I'm more than a little impressed by what you've achieved here already. It provides a lot of inspiration.

[fizgog]

Yes I'm afraid AcornPad is Windows only, even though I use a MacBook Pro

Finished work early, so Fixed the colour clash on the ladder (not worth showing a video) and also tidied up the screen loader and added a bit more text, this is it inside AcornPad

[Rob_hawk]

Yes I'm afraid AcornPad is Windows only, even though I use a MacBook Pro

I’ll experiment with Parallels again sometime soon.

Revised loading screen looking good.

[FourthStone]

Really enjoying this thread, keep up the amazing effort

[ChrisB]

Looking really good. You inspired me me read up on the way the game generates screens - very ingenious.

[fizgog]

Work and family life seems to be getting in the way of coding, but I have managed to add the animated enemy cobra to the game

Current progress can be previewed here
https://youtu.be/CU9wkswHooM

[Rob_hawk]

Another step towards the finished article

[fizgog]

Further progress last night

Fixed tree and leaves generation
Converted cobra.asm code to object.asm and added the following: -

Static log
Animated bouncing rolling log
Animated fire
Animated cobra

I'm going to have to delve into the 2600 code to see how they do multiple logs just from using objectType 1, 2, 3, 4 and 6 (001, 010, 011 and 110)

Rolling logs going over a hole change some of the sprite colour to cyan as I'm using EOR, I probably need to instead use a mask and store the background area

https://youtu.be/oa5xLtTZafU

[Beebson]

Getting better and better......

[Rob_hawk]

Great progress and it’s made my morning seeing the extra content

[fizgog]

I'm going to have to delve into the 2600 code to see how they do multiple logs just from using objectType 1, 2, 3, 4 and 6 (001, 010, 011 and 110)

I've managed to download the book Racing the Beam and according to page 35 the TIA offers two number-size registers NUSIZ0 and NUSIZ1 to allow the placement of the same sprites on screen (it's how they did Space Invaders)

So I've got some reading to do tonight

[Rob_hawk]

I've managed to download the book Racing the Beam and according to page 35 the TIA offers two number-size registers NUSIZ0 and NUSIZ1 to allow the placement of the same sprites on screen (it's how they did Space Invaders)

Glad you found the book and more importantly that it’s been helpful!