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... decimal digits, c=0
xor a
rrd ; a,(hl ... ),a ; (hl) = BCD(7654)
xor a ; bcd rotate left is ... -
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... , c = $0f nibble mask
xor a
rrd ; a,(hl ... -
So who plays PS2, Xbox & GameCube games?I'm still into gaming in a big way, how about you guys?
... , but using a monochrome simon masked against a coloured background is ... -
Best games you've never heard ofSorry if this has been done before. I've read some threads about the best games for the Spectrum, i think on the whole we all know about JSW, Elite, …
... )
HEXAGONIA (Atomix sequel)
XOR (logical)
F.I.R ... -
New project for 256 colours Games emulator!O.K. , I suggested Jonathan Needle ( Creator of the excellent Spectaculator at [url="http://www.Spectaculator.com"]www.Spectaculator.com[/url] ) to c…
... instructions and logical AND/OR/XOR with other graphic images but ... -
ZX81 ScrollingI'm tempted to have a go at a bit of ZX81 programming, using MCODER II, though I could really use a fast multi-directional scrolling routine. Does a…
... DE,(VAR FOR BEGINSCREEN)
XOR A
SBC HL,DE ... -
some new games ?is anybody working on a game for speccy?
I think as long as the sprites are masked with an outline around them (which they will be) than they should look pretty good against the backgrounds. Of course they will take on the colour of the background. -
Platform vs BackgroundForgive my ignorance if this is a 'stoopid' question, but although I've written games for many platforms over the years I'm only now making my first …
... like "sprite chars should be masked in this position", "this is ... -
Any Errors?Any errors you feel Sinclair Research or even Amstrad made with the speccy??
... 69888 tstates) are disabled (or 'masked') by the DI instruction. The ... -
Any Errors?Any errors you feel Sinclair Research or even Amstrad made with the speccy??
... 69888 tstates) are disabled (or 'masked') by the DI instruction. The ... -
256 colour gamesFollowing on from the thread in the Emulator section... Will people who are working on converting games to 256 colour using Emuzwin please let me kn…
... . I've tried with XOR = 1 and XOR = 0, and with AND ... -
256 colour gamesFollowing on from the thread in the Emulator section... Will people who are working on converting games to 256 colour using Emuzwin please let me kn…
... trails. I've tried XOR=1 and XOR=0. Can you suggest ... -
EmuZWin supports 256 color gamesI am sorry starting new topic, but you see this info is important a bit: new version 2.4 of the EmuZWin is available to download, and it supports 25…
... three options. Normally A xor B xor B must be = A ... updates picture on screen using XOR, first time to erase it ... This includes internally leveled OR, XOR, AND, but provides correct restoration ... original picture when XOR with the same value ... -
EmuZWin supports 256 color gamesI am sorry starting new topic, but you see this info is important a bit: new version 2.4 of the EmuZWin is available to download, and it supports 25…
... =1. Seems this game uses XOR to update charcters on screen ... -
MC 101Hello Group Members: Can't spectrum MC be embedded in a BASIC program
... /> ld a,l
xor d
xor e
srl a ... -
InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…
... as it cannot be disabled ('masked') by the DI instruction, and ... -
Collision DetectionHi everyone, This is my first post on WOS. Like most people here I owned a Spectrum when a teenager. At that time I was quite heavily into programmin…
Thanks for the replies guys. A couple more questions though. Woody, could you explain what is meant by "double buffering", and would this method work with masked sprites. -
Collision DetectionHi everyone, This is my first post on WOS. Like most people here I owned a Spectrum when a teenager. At that time I was quite heavily into programmin…
... and check again
XOR A ;No collision at all ... -
What sort of new games would you like to see on the Speccy?With the amount of coders we have around, I'm surprised that we don't see more new Speccy games. _________________ [url="http://www.gamestyle.net"]h…
... pixels scrolling and some nice masked sprites it could be possible ... -
Pixel setting / general speccy codingi just started doing some cross-coding with the [url="http://www.bigfatpanda.fsnet.co.uk/z80.html"]Z80 SNA assembler[/url] and an emulator, and this …
... DE,HL ; get address
XOR (HL) ; reset pixel
LD ... -
need help with speed optimization. this procedure draws a sprite with mask from memory onto the screen with x-coordinate in pixels. it doesn't shift sprites in realtime, it just uses …
... sprites. For a small (16x16) masked sprite, it would take 768 ...
