Apparently, this isn't an official Atari release.
Looks quite legit to me though.
----------------------------------------------------------------
Anyway, looking through the source is fun
Feel free to telephone John Feagans at Atari (U.S.) at area code
(408) 745-4923 any time you have a question about using the
software. He wrote the download program and the transfer rom
code. He's the one who did not write any support documentation
to go with his software.
Oh! What a fine boy is Dave Staugas.
** ASTEROIDS FOR THAT DAMN ATARI 3600, OR IS IT 7000, I FORGET. *
** WRONG!! IT'S THE ATARI 7800 PRO SYSTEM. TA DA! *
LDX OFFPLAY2 ;POWER STEERING BABY!
BNE CKJOYRTS ;NO. DON'T DO RANDOM VIOLENCE
;HERE ON OLD-STYLE SINGLE BUTTON JOYSTICK PRESS.
GOTONE:
LDA ONEBUT ;TURN OFF TWO-PLAYER BIT IMMEDIATELY
ORA RJBITS,X ; TO AVOID BURNING OUT HARDWARE
DROPCODE:
LDA CODE,X ;CODE IS PRETTY RANDOM.
STA RAND,X ;AT LEAST OURS IS.
BEQ AIMSHOT ;MR. BILL AIMS HIS SHOTS
JSR NEWRAND ;SLUGGO IS RANDOM
PICKSRAN:
JSR NEWRAND ;PICK A SHIP RANDOMLY
ASL ;WE'RE SUCH ASL'S
BCC AIMSHIP1
** RANDOM NUMBER ROUTINES, >NOT< PREVIOUSLY IN RANDOM.S **
* NEWRAND: A WHOLESOME RANDOM NUMBER JENERATER FROM KNUTH (NOTABLE PEDIGREE)
* ROTATE THROUGH THE COLORS TO TWINKLE THE STARS.
TWINKLE:
JSR NEWRAND ;DECIDE WHICH STARS TO TW'INC'LE
TAKEOVER: .ds.b 1 ;ARE THESE NEEDED ANYMORE GUYS
NEXFRAME: .ds.b 1 ;WHAT THE FUCK???
GSCRFLAG: .ds.b 1 ;FLAG FOR MAINLOOP, SAYING WE SCROLLED
GCOARSE: .ds.b 1 ;MORE SCROLLING FLAGS FOR THE MASSES
FUCKFLAG: .ds.b 1 ;11 ;WHO THE FUCK KNOWS!
SPNZ: .ds.b 1 ;UPDATE THIS GUYS???
ZBUFF0: .ds.b 33 ;CHARACTER BUFFERS
ZBUFF1: .ds.b 33 ;ALSO USED FOR TITLE PAGE SHIT
STX TEMP3 ;FIXED VP TO AVOID SANDFUCKER MODE
POSTGTFL: CMP #126 ;A MAGIC NUMBER IF I EVER SAW ONE
* ROUTINE (YOU MEAN CODE FRAGMENT) TO DO DEATH ANIMATION
LDX #$FF ;FUCK WITH THE MOVEMENT FLAG
LDX SHOTCNT ;COMMENT THIS
BNE ADJYDONE ;NEVER HAPPENS. WHAT DA FUCK??
ADJYAIR: CLC ;WHAT GIVES FOLKS??
ASHOT1: CMP #UWECOL ;WHAT ABOUT A UWE
BNE ASHOT2
lda WANIMCNT-UWEDEX,x ;Is the uwe exploding?
cmp #13 ;If yes, don't kill again.
;THERE ARE FOUR FIREMODES -- 0) MELLOW 1) RANDOM 2) SPASTIC 3) HARDCORE
;THIS MUST BE THE HARDCORE DRIVER. WE KEEP GOAL RANDOM IF NOT IN
;RANGE OF X. IF IN X RANGE, WE KEEP GOAL LOW UNTIL IN Z RANGE. THEN
;WE RAISE GOAL TO ZAP THE DESERT FUCKIN' FALCON
.dc.b $FF,$00 ;WINGS9 255 TH-THAT'S ALL FOLKS
LDA #WINGS0&$FF ;HACK FIRST AND LAST CHAR OF WINGMAP2
STA WINGMAP2 ;THIS IS TO SAVE BYTES YOU REALIZE
PALWD2: .dc.b $00,$00,$31 ;CREST (NOT THE TOOTHPASTE!)
* CHAR MAPS FOR ONE AND TWO PLAYER SHIT
STX JERKOFF
; BIT FUCKFLAG ;PUT THESE BACK TO SEE IF LOADER IS
; BPL FINE ;INTERRUPTED BY THIS DLI
; GOTCHA NOP
LDA #$50 ;COMMENT
LDA #0 ;BLACKGROUND
LDA #0 ;FOR FUTURE EXPANSION AND IMPERIALISM
LDA #0 ;ENOUGH TIME HAS ELAPSED TO ALLOW CAPS
STA $1 ;TO DISCHARGE SO CONTINUE FUCKING WITH
LDA #$14 ;IO HARDWARE
LDA #ALADIN1 ;START TUNE THIS IS BULLSHIT
JSR TUNIN ;COMMENTED OUT CAUSE I CANT STAND IT
GAMSTATE: BIT GAMEOVR ;IF OVER BOOGIE ON TO TITLE PAGE
LDX #$7F ;WHO THE FUCK KNOWS ANYWAY
JMP MAINLOOP ;AND AGAIN AND AGAIN
GOTONE: LDA ONEBUT ;SET ONE-BUTTON MODE IMMEDIATELY
ORA RJBITS,X ; TO AVOID DESTROYING HARDWARE!
lda PTIMER ;Already got something cookn'?
NOWHI: LDX PLAYER ;THIS SHIT YOU SEE HERE AND MANY PLACES
BEQ ONER ;GETS THE APPROPRIATE PLAYER INDEX INTO
LDX #3 ;X
LDX #CRISVARS&$FF ;SORRY CRIS! HAD TO DO IT
DICKLESS: CMP #16 ;IF >= 16 THEN WE MUST GO TO RIGTMASK
TAX ;CLEVER HACKERY. DON'T ASK
CMP #$F4 ;EMPIRICALLY DETERMINED. BOO HOO
LDA FLTUNE,X ;JUST FOR JOHN, HONEST.
.EXIT1: LDA #$00 ;TELLS JOHN NOT TO DO UWES
;THE CONSTANTS IN THIS ROUTINE ARE RUMORED TO BE CLOSE
*PROGRAMMERS BEWARE: THIS CODE IS OLD AND VERY UGLY! TAMPER AT YOUR OWN RISK
CMP #$F1 ;TALK TO JEM ABOUT THIS ONE GRRRR!
STA KTEMP1 ;REPLACE OLD KTEMP1 (THIS IS WHY WE
;AND WITH F ABOVE) I DON'T SEE WHY THIS
;WOULD EVER WORK
ENDRAM0: .ds.b 1 ;MOVE ME AS NEEDED YES SIR