Search found 275 matches

by bobs
Sun Jan 07, 2018 2:31 pm
Forum: Development
Topic: Fast PLOT routine
Replies: 7
Views: 195

Re: Fast PLOT routine

I could write a lot on this subject, as many of my ZX81 games - especially ZXagon - need to do this. I’m pretty sure I could write a faster routine than the one mentioned here, but the real trick is to not do it from BASIC, so you can use a custom back buffer format which suits the kind of graphics ...
by bobs
Tue Dec 12, 2017 8:11 am
Forum: Sinclair Misc
Topic: Bobs stuff is down
Replies: 5
Views: 333

Re: Bobs stuff is down

Hi all! I'm really amazed/touched that anybody noticed! It wasn't planned - there's been a problem with renewing the domain which wasn't noticed until finally 'hit' and went offline. Hopefully everything will be back as it was soon, but I also have a contingency plan if that doesn't go to plan (Unti...
by bobs
Sat Jan 23, 2016 7:51 pm
Forum: GAMES
Topic: CroZXy Road - New 16K ZX81 game
Replies: 5
Views: 1011

Re: CroZXy Road - New 16K ZX81 game

Thanks dasteph & kokkiklhs , it's always really great to hear back from people who play my games - otherwise I'd think nobody cared! You're exactly right dasteph - one of the reasons I converted this, and ZXagon (see Super Hexagon) before it, is to prove that there are some great modern game ideas w...
by bobs
Sun Jan 03, 2016 1:21 pm
Forum: Hardware
Topic: ZXpand ROM character set corruption
Replies: 7
Views: 611

Re: ZXpand ROM character set corruption

Thanks Mark, will give disabling the EPROM a go.
by bobs
Sat Jan 02, 2016 11:42 pm
Forum: Hardware
Topic: ZXpand ROM character set corruption
Replies: 7
Views: 611

Re: ZXpand ROM character set corruption

That sounds like a simpler solution to my problem Mark, but would the joystick interface still be available to me? That's the only functionality of the interface which is used.
by bobs
Sat Jan 02, 2016 10:17 pm
Forum: Hardware
Topic: ZXpand ROM character set corruption
Replies: 7
Views: 611

Re: ZXpand ROM character set corruption

Thanks Siggi, that makes sense. Hopefully I can find enough memory to duplicate the font into RAM for the affected games.
by bobs
Sat Jan 02, 2016 8:38 pm
Forum: GAMES
Topic: CroZXy Road - New 16K ZX81 game
Replies: 5
Views: 1011

Re: CroZXy Road - New 16K ZX81 game

Looks like there could be some graphical corruption when the game prompts for initials for a highscore and the ZXpand interface is used. The game itself will continue to work correctly, but your position in the highscore table, and the initials you enter, will appear as random blocks. I'm hoping som...
by bobs
Sat Jan 02, 2016 8:19 pm
Forum: Hardware
Topic: ZXpand ROM character set corruption
Replies: 7
Views: 611

ZXpand ROM character set corruption

I've just released 'CroZXy Road' for the 16K ZX81, and somebody has mentioned that there is graphical corruption when a ZXpand interface is present. This has been seen when using the EightyOne emulator, and I've narrowed it down to my game reading the font bytes from the ROM address 0x1E00 forward t...
by bobs
Sat Jan 02, 2016 4:25 pm
Forum: GAMES
Topic: New ZX81 Games
Replies: 105
Views: 27219

Re: New ZX81 Games

Name of Software: CroZXy Road Author: Bob Smith Release Date: 02/01/2016 Requirements (eg. 1K, 16K, AY Card, Hi-Res Scheme): 16K (ZXpand joystick support) Description: Crossy Road clone . Screenshots: http://www.bobs-stuff.co.uk/zx81.html http://www.bobs-stuff.co.uk/images/cr_1_d2.png http://www.bob...
by bobs
Sat Jan 02, 2016 4:21 pm
Forum: GAMES
Topic: CroZXy Road - New 16K ZX81 game
Replies: 5
Views: 1011

CroZXy Road - New 16K ZX81 game

CroZXy Road - for the 16K ZX81.

A version of the iconic mobile title 'Crossy Road', by Hipster Whale.

Officially approved, and completely free.

More details at http://www.bobs-stuff.co.uk/zx81.html

The game supports the ZXpand joystick.

Image