-
BinaryGoddess' Blog
-
Albert's Blog
-
MegaManFan's Blog
-
Ed Siegler's Blog
-
FireTiger's Blog
-
Atari Rescue Group's Blog
-
EricBall's Tech Projects
-
liquid_sky's Blog
-
Cybernoid's Blog
-
Lost Blog
-
shep's Blog
-
Trey's Blog
-
Boo
-
Kepone's Blog
-
Beware of Kiwi
-
Fun in the beer mines
-
PacManPlus' Blog
-
Atari 8-bit Moria port
-
Tim's Blog
-
Mindfield's Chewy-Centered Blog
-
The Long Dark Teatime of the Soul
-
TP's Blog
-
Adam Sessler's Brutally Honest Blog
-
Shut Up and Play Yer Atari
-
None
-
Atarinvader's Blog
-
Atari 8-bit archiving
-
Brunobits' Blog
-
ATARIeric's Blog
-
wrenchien's Blog
-
Trade-N-Games' Blog
-
wapchimp's Blog
-
Shared Words
-
Bastard's Blog
-
homerwannabee's Blog
-
Haydn Jones' Blog
-
The World According To Yuppicide
-
How I did It
-
Buck's Blog
-
atwwong's Blog
-
1
-
sandmountainslim's Blog
-
Atari Jaguar Projects + More
-
StanJr's Blog
-
Schmutzpuppe's Blog
-
Bullitt's Blog
-
panda_racer's Blog
-
Inky's Blog
-
Lauren's Place
-
DanBoris' Tech Blog
-
atariauctions' Blog
-
Planet Bob
-
CSIXTY4.com
-
Robin Gravel's Blog
-
lestergame
-
Duke 4ever's Blog
-
Atari Haiku Blog
-
An7ron
-
glitch's Blog
-
Coleco-Atari Era
-
Kenfused's Blog
-
Ralph3's Blog
-
nester's one star gaming
-
Halt and Catch Fire
-
lizard's Blog
-
Laner's Classic Gaming Blog
-
Page 6
-
keilbaca's rants
-
SirWilliam's Blog
-
Birdie3's blog
-
MattG/Snyper2099's Blog
-
madmjennifer's Blog
-
Ablogalypse Now
-
Endless Quest
-
Greenious' Blog
-
wookie's Blog
-
Justclaws' Blog
-
VTAtari's Blog
-
SID CROWE TESTING THE blog softwareeee
-
Dutchman2000's Blog
-
Famicoman's Blog
-
scogey's Blog
-
Retro Gaming Obscuria
-
atarifan49's Blog
-
Chronogamer
-
flavoredthunder's Blog
-
Shernand's Blog
-
Robert M's Blog
-
albaki's Blog
-
BTHOTU's Blog
-
Zach's Projects
-
BuzzTron-451's Blog
-
The Occasional Coder
-
Joystick Lunatic Software on AtariAge
-
Zander's Blog
-
The randomness that is Mr. 8-bit/16-bit.
-
bluetriforce's Blog
-
ubikuberalles' Blog
-
Worm Development Blog
-
Eight Bit's Blog
-
mos6507's Blog
-
phaxda's Blog
-
potatohead's Blog
-
Mountain King's Blog
-
The Southsider
-
The World is Flat?
-
brianwolters' Blog
-
Bidouille's Blog
-
Zybex/Atariware Blog
-
JagDiesel's Palace 2
-
Sega_master's Blog
-
Deep into the Mind Game
-
Bob's Blog
-
Rockin' Kat's Blog
-
Push Me, Pullman
-
(Insert stupid Blog name here)
-
dgob123's INTV Blog
-
Random Terrain's Tetraternarium
-
Odyssey Development Corner
-
Pacmaniax
-
GPD Comics Blog
-
sergiomario's Blog
-
prorobb's Blog
-
Days Atari Events
-
gamester1's Blog
-
Shannon's Blog
-
Mord's Blog
-
liquidcross.com - blog
-
MIPS HEAVY INDUSTRIES
-
MayDay Today
-
javiero's Blog
-
Great Exploitations
-
Monster Angriff's Blog
-
Draikar's Blog
-
Random Acts of Randomness
-
TROGBlog
-
hex65000's Blog
-
Being Of The Importance Of Shallow Musing.
-
daclmi's Blog
-
2600 in 2006
-
Sayton's Blog
-
For whom it may concern
-
Osbo's Blog
-
ataridude81's Blog
-
Wiesbaden Gaming Lab
-
SpiceWare's Blog
-
The Upward Spiral
-
Web-Frickin'-Log
-
Starosti 8bitového grafika
-
WWW.BUYATARI.TK
-
commodore & atari :)'s Blog
-
Dusk2600's Blog
-
GAMEBOT
-
Lynx 20 years
-
Songbird Productions
-
SpaceInvader's Blog
-
Retro point of view
-
VampyricDreams666's Blog
-
le geek's nonsense
-
Hardcore's Nostalgia
-
4old-times-sake's Blog
-
shadow460's Blog
-
AtariJr's Blog
-
Memoirs of an X register
-
maximebeauvais' Blog
-
atari2600land's Blog
-
.:maus:.
-
PAM1234's Blog
-
Nabuko's Den
-
Paranoid's Blog
-
Culmins Development's Blog
-
Atari Joe's Flippin' Sweet Blog
-
When Robots Attack
-
Flack's Daily Smack
-
Jboypacman's Blog
-
neonesmaster's Blog
-
Classic Stories
-
Bruce Tomlin's Blog
-
Beetle's Blog
-
5-11under's Blog
-
EricDeLee's Blog
-
TunnelRunner's Blog
-
jaymz887's Blog
-
fojy-harakiri's Blog
-
Shroo-man's Blog
-
Ataria51's Blog
-
Mr. Pac-Man's Blog
-
JellE's Dwelling
-
Gaming With Rogmeister
-
Pengwin's Blog
-
neotokeo2001's Blog
-
Arcade's Blog
-
R. Jones' Blog
-
payman84ce's Blog
-
Awed Thoughts
-
super mario 64 level editor
-
Christos' Blog
-
atari_collector's Blog
-
imtron's Blog
-
My Vintage Game collection
-
classicgamingguy's Blog
-
HP Atari King of Michigan's Blog
-
Unknown arcade titles from Fighter17
-
Ain't got time for no Jibbajaba
-
Wickeycolumbus' Blog
-
Ramblings of a moron
-
HatNJ's Blog
-
BlogO
-
ELEKTROTECK
-
bf2k+'s Blog
-
ParaJVE's Blog
-
Cody Rushton's blog
-
It's my life!
-
Bakasama's Blog
-
Dennis V's Blog
-
RaRoss' Blog
-
Collecting Demos
-
Dave Neuman's Blog
-
Borntorun's Blog
-
warren798's Blog
-
Tweety's Blog
-
-^CB^-'s Game Reviews
-
seekingarobiejr's Blog
-
revival studios
-
bust3dstr8's Blog
-
Rom Hunter's Blog
-
Shark05's Blog
-
Lord Helmet's Blog
-
ryanez1's Blog
-
kit's Blog
-
Burma Rocks
-
Bubsy Bobcat Fan Blog
-
Habaki's Blog
-
Dan's Road to 2600 nirvana
-
wccw mark's Blog
-
Hornpipe2's Blog
-
Phantom's Blog
-
Piggles' Blog
-
Dino Dash Derby
-
games_player's Blog
-
1982VideoGames' Blog
-
Cabbage Patch Kids! Lookin' Great!
-
Confessions of an Aging Gamer...
-
theking21083's Blog
-
retrogeek's Blog
-
Liveinabin's scribbles
-
Cimerians' Blog
-
CollectorVision Blog
-
Ransom's Random Posts
-
www.toyratt.com's Blog
-
RonPrice's Blog
-
s0c7's Blog
-
doyman's Blog
-
DJTekid's Blog
-
EG's code blog
-
kiwilove's Blog
-
8 Bit Addiction
-
Playing With History
-
simonh's Blog
-
Zereox's Blog
-
Draconland
-
chris_lynx1989's Blog
-
Phuzzed's Blog
-
7800 NZ's Blog
-
Gamera's Reviews: E.T Coming Soon!
-
Iwan´s Irrational!
-
seemo's Blog
-
The Eviscerator Series
-
Noelio's Blog
-
480peeka's Blog
-
For Next
-
Take 'Em To The Woodshed
-
bankockor Blog
-
Kelp Entertainment
-
2600 Fun Blogs
-
PinBlog
-
IHATETHEBEARS' BLOG
-
Atari Fan made Documentary
-
Flashjazzcat's Blog
-
THE 1 2 P's Demo/Import/Gaming Blog
-
STGuy1040's Blog
-
enyalives' Blog
-
Mirage1972's Blog
-
blogs_blog_286
-
The Word Of Ogma
-
GC's blog
-
nanobug's monument of geekiness
-
dogcorn's Blog
-
I Can't Think of a Catchy Title
-
please help and share story
-
ivop's Blog
-
what is the chicago basment
-
Cheat Blog
-
zeropolis79's Blog
-
My video game library
-
the.golden.ax's "Oh my Blog"
-
ValuGamer
-
wolfpackmommy's Blog
-
Z80GUY's Blog
-
jwierer's Blog
-
kroogur's Korner
-
Verbal Compost
-
Frizo's Collecting Adventure!
-
Old School Gamer Review
-
...
-
Rybags' Blog
-
BDW's Blog
-
tweetmemory's Blog
-
toptenmaterial's Blog
-
grafix's Bit Mouse Playhouse
-
S1500's Blog
-
hackerb9's blog
-
EricBall's Tech Projects (PRIVATE)
-
MagitekAngel's Blog
-
I created this second blog on accident and now I can't figure out how to delete it.
-
keilbaca's Blog
-
TestBot4's Blog
-
Old School Gamer Review
-
The Mario Blog
-
GideonsDad's Blog
-
GideonsDad's Blog
-
GideonsDad's Blog
-
Horst's Blog
-
JIMPACK's Blog
-
Blogpocalypse
-
simonl's Blog
-
creeping insanity
-
Sonic R's Blog
-
CebusCapucinis' Blog
-
Syntax Terror Games
-
NCN's Blog
-
A Wandering Shadow's Travels
-
Arjak's Blog
-
2600Lives' Blog
-
2600Lives' Blog
-
Kiwi's Blog
-
Stephen's A8 Blog
-
Zero One
-
Troglodyte's Blog
-
Austin's Blog
-
Robert Hurst
-
This Is Reality Control
-
Animan's Blog Of Unusual Objectionalities
-
Devbinks' Blog
-
a1t3r3g0's Blog
-
The 7800 blog
-
4Ks' Blog
-
carmel_andrews' Blog
-
iratanam's Blog
-
junkmail's RDE&P Blog
-
Lynxman's FlashCard Blog
-
JagMX's Blog
-
The Wreckening
-
roberto's Blog
-
Incagold's Blog
-
lost blog
-
kurtzzzz's Blog
-
Guitarman's Blog
-
Robert @ AtariAge
-
otaku's Blog
-
otaku's Blog
-
revolutionika's Blog
-
thund3r's Blog
-
edweird13's Blog
-
edweird13's Blog
-
That's what she said.
-
Hitachi's Blog
-
The (hopefully) weekly rant
-
Goochman's Marketplace Blog
-
Marc Oberhäuser's Blog
-
Masquane's AtariAge Blog
-
satan165's Dusty Video Game Museum
-
lazyhoboguy's Blog
-
Retail hell (The EB years)
-
Vectrexer's Blog
-
Game Maker to Game Dev
-
Retro Gaming Corporation
-
Hulsie's Blog
-
Tr3vor's Blog
-
Dryfter's Blog
-
Why Are You Even Reading This?
-
Xuel's Blog
-
GamingMagz
-
travelvietnam's Blog
-
pacmanplayer's Blog
-
TheLunarFox's Blog
-
caver's Blog
-
Atari 2600 for sale with 7 games 2 controllers
-
A Ramblin' Man
-
toiletunes' Blog
-
Justin Payne's Blog
-
ebot
-
Markvergeer's Blog
-
GEOMETRY WARS ATARI 2600
-
LEW2600's Blog
-
Pac-Man Vs Puck-Man's Blog
-
Bri's House
-
Les Frères Baudrand's Blog
-
Secure Your E-Commerce Business With ClickSSL.com
-
raskar42
-
The P3 Studio
-
Bydo's Blog
-
defender666's Blog
-
TheSSLstore - SSL certificates Validity
-
Chuplayer's Blog
-
pacman100000's Blog
-
POKEY experiments
-
JPjuice23's Blog
-
Gary Mc's Blog
-
arkade kid's Blog
-
MaXStaR's Blog
-
SUB HUNTER in A8
-
ScumSoft's Blog
-
The Social Gamer
-
Ping. Pong. Ping. Pong.
-
kgenthe's Blog
-
mapleleaves' Blog
-
Dallas' Blog
-
bfg.gamepassion's Blog
-
Esplonky's Blog
-
Fashion Jewellery's Blog
-
Gabriel's Blog
-
CJ's Ramblings
-
Dastari Creel's Blog
-
dobidy's Blog
-
dragging through the retro streets at dawn
-
Please Delete - Created by Accident
-
Nerdbloggers
-
Algus' Blog
-
Jadedrakerider
-
Appliciousblog.com
-
frederick's Blog
-
longleg's Blog
-
Brain droppings...
-
Sandra's blog
-
Bastelbutze
-
polo
-
VectorGamer's Blog
-
Maybe its a Terrible Tragedy
-
Guru Meditation
-
- - - - - -
-
The 12 Turn Program: Board Game Addiction and You
-
Tezz's projects blog
-
chonglily's Blog
-
masseo1's Blog
-
DCUltrapro's Blog
-
Disjaukifa's Blog
-
Vic George 2K3's Blog
-
Whoopdeedoo
-
ge.twik's Blog
-
DJT's High Score Blog [Test]
-
Disjaukifa's Assembly Blog
-
GonzoGamer's Blog
-
MartinP's Blog
-
marshaz's Blog
-
Pandora Jewelry's Blog
-
Blues76's Blog
-
Adam24's AtariAge Blog!
-
w1k's Blog
-
8-bit-dreams' Blog
-
Computer Help
-
Chris++'s Blog
-
an atari story
-
JDRose
-
raz0red's Blog
-
The Forth Files
-
The Forth Files
-
A.L.L.'s Blog
-
Frankodragon's Blog Stuffs
-
Partyhaus
-
kankan313rd's Blog
-
n8littlefield's Blog
-
joshuawins99's Blog
-
¡Viva Atari!
-
FujiSkunk's Blog
-
The hunt for the PAL Heavy Sixer
-
Liduario's Blog
-
kakpu's Blog
-
HSC Experience
-
people to fix atari Blog
-
Gronka's Blog
-
Joey Z's Atari Projects
-
cncfreak's Blog
-
Ariana585's Blog
-
8BitBites.com
-
BrutallyHonestGamer's Blog
-
falcon_'s Blog
-
lushgirl_80's Blog
-
Lynx Links
-
bomberpunk's Blog
-
CorBlog
-
My Ideas/Rants
-
quetch's Blog
-
jamvans game hunting blog
-
CannibalCat's Blog
-
jakeLearns' Blog
-
DSC927's Blog
-
jetset's Blog
-
wibblebibble's Basic Blog
-
retrovideogamecollector's Blog
-
Sonny Rae's Blog
-
The Golden Age Arcade Historian
-
dianefox's Blog
-
DOMnation's Blog
-
segagamer99's Blog
-
RickR's Blog
-
craftsmanMIKE's Blog
-
gorf68's Blog
-
Gnuberubs Sojourn Dev Journal
-
B
-
iesposta's Blog
-
Cool 'n' Crispy: The Blog of Iceberg_Lettuce
-
ahuffman's Blog
-
Bergum's Thoughts Blog
-
marminer's Blog
-
BubsyFan101 n CO's Pile Of Game Picks
-
I like to rant.
-
Cleaning up my 2600
-
AnimaInCorpore's Blog
-
Space Centurion's Blog
-
Coleco Pacman Simulator (CPMS)
-
ianoid's Blog
-
HLO projects
-
Retro Junky Garage
-
Sega Genesis/Mega Drive High Score Club
-
Prixel Derp
-
HuckleCat's Blog
-
AtariVCS101's Blog
-
Tales from the Game Room's Blog
-
VVHQ
-
Antichambre's Blog
-
REMOVED BY LAW AUTHORITY
-
Synthpop Universe
-
Atari 5200 Joystick Controllers
-
Top 10 Atari 2600 Games
-
Is Atari Still Cool?
-
Buying Atari on Ebay
-
matosimi's Blog
-
GadgetUK's Blog
-
The StarrLab
-
Scooter83 aka Atari 8 Bit Game Hunters' Blog
-
Buddpaul's Blog
-
TheGameCollector's Blog
-
Gamming
-
Centurion's Blog
-
GunsRs7's Blog
-
DPYushira's Entertainment Blog
-
JHL's Blog
-
Intellivision Pierce's Blog
-
Manoau2002 Game and Vinyl Blog
-
Diamond in the Rough
-
Linky's Blog
-
flashno1's Blog
-
Atari 2600 Lab
-
jennyjames' Blog
-
scrottie's Blog
-
Draven1087's Blog
-
Omegamatrix's Blog
-
MegaData Manifesto
-
Selling Atari on Ebay.
-
Unfinished Bitness
-
TI-99/4A Stuff
-
eshu's blog
-
LaXDragon's Blog
-
GozAtari8
-
Bio's Blog of Randomness
-
Out of the Pack
-
Paul Lay's Blog
-
Make Atari 2600 games w/o programming!
-
Rudy's Blog
-
kenjennings' Blog
-
The Game Pit
-
PShunny's Blog
-
Ezeray's Blog
-
Atari 2600 game maps
-
Crazy Climber Metal
-
Keith Makes Games
-
A virtual waste of virtual space
-
TheHoboInYourRoom's Blog
-
Msp Cheats Tips And Techniques To Create You A Better Gamer
-
Tursi's Blog
-
F#READY's Blog
-
bow830
-
Gernots A500 game reviews
-
Byte's Blog
-
The Atari Strikes Back
-
no code, only games now
-
wongojack's Blog
-
Lost Dragon's Blog
-
Musings of the White Lion
-
The Usotsuki Crunch
-
Gunstar's Blogs
-
Lesles12's Blog
-
Atari Randomness
-
OLD CS1's Blog
-
waterMELONE's Blog
-
Flickertail's Blog
-
Dexter's Laboratory Blog
-
ATASCI's Blog
-
ATASCI's Blog
-
--- Ω ---'s Blog
-
mourifay's Blog
-
Zsuttle's gaming adventures
-
Doctor Clu's Space Shows
-
TWO PRINTERS ONE ADAM
-
Atari Jaguar Game Mascots
-
Learning fbForth 2.0
-
splendidnut's Blog
-
The Atari Jaguar Game by Game Podcast
-
Syzygy's Story Blog
-
Atarian Video Game Reviews
-
Caféman's Blog
-
IainGrimm's Blog
-
player1"NOT"ready's Blog
-
Alexandru George's Blog
-
BraggProductions' Blog
-
XDK.development present Microsoft Xbox One Development
-
Song I Wake Up To
-
Jeffrey.Shamblin's Blog
-
Important people who shaped the TI 99/4A World
-
My blog of stuff and things
-
David Vella's Blog
-
Osgeld's Blog
-
CyranoJ's ST Ports
-
InnovaX5's Blog
-
Star_Wars_Collector
-
Alp's Art Blog
-
Excali-blog
-
STGraves' Blog
-
Retro VGS Coleco Chameleon Timeline
-
Geoff Retro Gamer
-
Geoff1980's Blog
-
Coleco Mini
-
Coleco Mini
-
7399MGM's Blog
-
7399MGM's Blog
-
doubledragon77's Blog
-
Ballblogɀer
-
pitfallharry95's Blog
-
BawesomeBurf's Blog
-
Fultonbot's Atari Blog
-
Dmitry's Blog
-
Kaug Neatos Crash Bandicoot Bandwagon
-
lexmar482's Blog
-
vegathechosen's Blog
-
Atari 2600JS
-
Doctor Clu's Dissertations
-
schmitzi's Blog
-
BNE Jeff's Blog
-
AverageSoftware's Development Blog
-
FireBlaze's Blog
-
Atarimuseum.nl
-
Vorticon's Blog
-
TurkVanGogH GameZ's Blog
-
bow830's Blog
-
Arcade Attack - Retro Gaming Blog
-
MrRetroGamer's Blog
-
GG's Game Dev, Homebrew Review, Etc. Log
-
dazza's arcade machine games
-
Alcor450's Blog
-
The Outback
-
-^CroSBow^-'s Hardware Videos
-
Captain's Blog
-
Memoirs of a Novelty Account
-
newcoleco's Random Blog
-
Second-Hand Shop
-
Doctor Clu's BBS Trotter
-
Lunar eclipse of the mind
-
simon2014's Blog
-
PhilipTheWhovian's Blog
-
Troff the Shelf
-
jacobus Indev
-
Pac & Pal for the Atari 2600 fan project
-
drawscreen then reset
-
Retrogaming Ramblings
-
G-type's Blog
-
Blog o' Buttons
-
DarQ Massacres' Atari 2600 collection
-
FireStarW's Blog
-
Bobbety_F's Blog
-
Rose-Tinted Recollections
-
Young Guy Experiencing Atari
-
Gray Defender's Blog
-
atasciiview
-
2600 games worse then E.t
-
ZippyRedPlumber's Blog
-
game_escape's Blog
-
Jackel192's Blog
-
The UAV Blog
-
MykGerard
-
OS9Dude's Blog
-
FPGA video game console
-
darryl1970's Blog
-
Funkmaster V's Gettin' Hip with tha Atari 7800
-
AtariMI1978's Blog
-
AtariMI1978's Blog
-
vidak's Blog
-
8-bit Computer System Colors in Food Coloring
-
WebSiteRing
-
The Best Assembly Computer
-
As time goes by ...
-
Atari 2600 Collection Bulk Box/ Cartridge Sale
-
T.R.A.S.H Blog
-
goodlasers' Blog
-
GauntletKing2878's Blog
-
My Inner Geek
-
A Raccoon's Retrocade Romp - AA Edition
-
homeboy's Blog
-
ThatAtomCat's Blog
-
Hawk's Blog
-
Bryan's Random Stuff
-
Developing Atari Programs on the Atari 800
-
Eltigro's Blog
-
Memories Limited to 640KB
-
my journey to completing the entire Atari libaray
-
Roblox
-
Question for Homebrew publishers
-
zilog_z80a's Blog
-
Return of the Bobcat
-
deepthaw's Blog
-
Little bit of this and little bit of that
-
Shannon's Blog
-
DoctorSpuds Reviews Things
-
Atari Portfolio Page On Facebook
-
azure's Blog
-
The Atari Kid
-
Alien Isolation Blog
-
Atari_Ace's Blog
-
AtariAdventure's Blog
-
AtariCrypt
-
acsabo's Blog
-
Bioshock Text adventure
-
AtariAdventure Reviews
-
Infinite Warfare Specialist
-
Karl's Blog
-
Bjorkinator's Babbles
-
DZ-Jay's Random Blog
-
CX40Hero's Blog
-
Heroes & Shadows Dev Blog
-
Empty
-
GoldLeader's Blog
-
Adventures in CC65
-
CS2X C# on Atari
-
pboland's Blog
-
Matts's Blog
-
orrko8791's Blog
-
orrko8791's Blog
-
Revontuli's Blog
-
Not Steve's Blog
-
Not Steve's Blog
-
SPACE ROANOKE
-
My life
-
skycop's Blog
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ProcessJoystick: lda SWCHA sta Temp ; store Joysticks for later, ; going go be trashing the accumulator ldx #0 ; joystick counter PJLoop: cpx #1 beq LowNibble ; J1 already has bits in correct position lsr ; J0 needs to shift bits right 4 times lsr lsr lsr LowNibble: and #%00001111 ; we only want the low nibble xor #%00001111 ; flip bits so 1=direction held scb ; set carry bit? necessary? sbc #3 bmi MedSpeed ; must be going vertically sbc #2 ; all directions less than 5 aren't diag bmi FastSpeed ; probably going horizontally sbc #3 ; subtract 8 total beq FastSpeed ; going Right ; otherwise ... ; going diagonally lda Temp pha ; push it onto the stack lda Frame ; get the current frame and #7 ; if 8th frame, beq SlowMovement ; branch to rest of handler, like Collect Tutorial pla ; pull off stack lsr lsr lsr lsr jmp NextJoystick MedSpeed: lda Temp ; restore Joystick pha lda Frame and #3 beq SlowMovement pla lsr lsr lsr lsr jmp NextJoystick SlowMovement: pla ; pull back from stack FastSpeed: NormalJP: CheckRight asl bcs CheckLeft ldy ObjectX,x iny <compare with Arena size> CheckLeft: asl bcs CheckDown ... CheckDown: ... CheckUp: ... NextJoystick: inx cpx #2 bne PJLoop rts If I wanted to set the player speed based upon which direction the player is moving, how best to do that? Horizontally (fastest speed) Vertically (medium speed) Diagonally (slowest speed) I know of the Fractional/Sub-pixel movement. This doubles the RAM requirements for X,Y positions for each object. Essentially, you do 16-bit math on the positionX (onscreen) and the fractionalX (sub-pixel), and when the carry overflows into the onscreen Y position (P0_YPosFromBottom+1), the actual pixels get updated. I am still not sure In the example code, how I would modify it to identify the difference between moving vertical and moving vertically+horizontally simultaneously (diagonally). https://alienbill.com/2600/cookbook/subpixel.html ; for up and down, we INC or DEC ; the Y Position ;joystick down? lda #%00010000 bit SWCHA bne DoneMoveDown ;16 bit math, add both bytes ;of the ghost speed constant to ;the 2 bytes of the position clc lda P0_YPosFromBot adc #<C_GHOST_SPEED sta P0_YPosFromBot lda P0_YPosFromBot+1 adc #>C_GHOST_SPEED sta P0_YPosFromBot+1 DoneMoveDown lda #%00100000 ;Up? bit SWCHA bne DoneMoveUp ;16 bit math, subtract both bytes ;of the ghost speed constant to ;the 2 bytes of the position sec lda P0_YPosFromBot sbc #<C_GHOST_SPEED sta P0_YPosFromBot lda P0_YPosFromBot+1 sbc #>C_GHOST_SPEED sta P0_YPosFromBot+1 DoneMoveUp In the Collect Tutorial, the speed is modified by reading the joystick button. It uses a similar approach to handle directional movement as the example above. It left-shifts the SWCHA bits into the carry flag, and then processes each individual direction. Instead of setting the speed via a fractional X/Y position, it checks the current frame and only processes movement if the frame is divisible by 8 (about every 133 millisecond ) My guess is that before I start processing the individual directions RLUDxxxx, I need to determine if the player is moving Diagonally, Vertically, or Horizontally. Since the Atari sets bits as 0 when that direction is held (which does seem backwards), I would need to read SWCHA, store it (so it can be restored when processing the other joystick), set a counter for JoystickNo (X reg), shift-right if processing J0, then AND it with the P1 bitmask (P1_MASK = #%00001111, then XOR with the same mask to get bit=1 (true) for holding that direction. LowerNibble possible Joystick Values, (after AND + XOR) #%1010 - 10, RU-diag, slow speed #%1001 - 9, RD-diag, slow speed #%0110 - 6, LU-diag, slow speed #%0101 - 5, LD-dish, slow speed #%1000 - 8, R, fast speed #%0100 - 4, L, fast speed #%0010 - 2, U, med speed #%0001 - 1, D, med speed #%0000 - 0, not moving (Other impossible combinations, without special controllers) At this point I see two possibilities Poss1 - I should be able to use the lower nibble as a pointer offset to a speed table of possible speeds. (Not sure if I need a table that is 16 bytes or 11 bytes. 11 is the maximum when dealing with normal controllers since some joystick combinations aren’t possible). The table could have fractional speeds (so once again 2-bytes for each speed (20 total ROM bytes), and 4-bytes for each object. (X,Y and fractional for each). Poss2 - I can do what was done in the Collect Tutorial. Instead of saving the speed values, check the current frame and only process joysticks on frames divisible by some number (2^x-1 for best results). I can have conditional branches that first check if we are moving Up/Down (conveniently, this means low-nibble < 3) {only process every 4th frame}, then check if low-nibble is >4 (all low-nibbles 5 or greater are diagonal with the exception of Right = 0x08) and not exactly 8 {only process every 8th frame}, all other conditions {process every 2nd frame}. This should conveniently handle impossible joystick combinations. Code at TOP (seems to be full of errors. I must not be pushing/popping from the stack properly. I also seem to be controlling P0/P1 with the same controller)
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