We just released a Feb. 5 '89 prototype of DuckTales for the NES!
If you'd like to support our preservation efforts (and this wasn't cheap), please consider donating or supporting us on Patreon. Thank you!
If you'd like to support our preservation efforts (and this wasn't cheap), please consider donating or supporting us on Patreon. Thank you!
Zaxxan
Jump to navigation
Jump to search
|
|
| Zaxxan |
|---|
|
Developer:
Nial Mardon
|
Most. Obvious. Zaxxon clone. Ever.
Source Code Fragment
Beginning at 68B2 in the .tap dump, there's a piece of code lying in it.
,E
INC HL
LD (HL),D
DEC H
POP BC
LD DE,(#DA06)
LD A,141
LD (DE),A
JP STOR
REVERS LD A,B
CP L
LD B,A
LD A,C
CP L
INC A
LD C,A
EX DE,HL
ADD HL,BC
EX DE,HL
LD (HL),B
DEC HL
LD (HL),C
JR POK
TST PUSH HL
PUSH DE
EX DE,HL
LD DE,-240
CHCO LD A,H
CP #D0
JP M,RETU
JR NZ,NICH
LD A,L
CP 10
JP P,NICH
CP 0
JP M,NICH
LD A,255
JR POP
NICH ADD HL,DE
JR CHCO
RETU LD A,0
POP POP DE
POP HL
RET
TSM LD HL,#DC00
LD B,64
SLP CALL LOAD
LD A,D
CP 0
JR Z,SCD
PUSH HL
EX DE,HL
LD DE,-10
ADD HL,DE
LD (HL),0
EX DE,HL
POP HL
CALL TST
CP 255
JR Z,DS
PUSH HL
EX DE,HL
LD DE,-10
ADD HL,DE
EX DE,HL
POP HL
LD A,(DE)
CP 0
JR NZ,DS
CALL TST
CP 255
JR Z,DS
LD A,139
LD (DE),A
SSTO LD (HL),D
DEC HL
LD (HL),E
INC HL
SCD INC HL
DJNZ SLP
RET
DS LD DE,0
JR SSTO
CHECK PUSH HL
LD HL,(#DA02)
LD A,(HL)
CP 0
JP Z,PARE
CP 133
JP Z,PARE
CP 10
JP Z,THVOR
YLF LD HL,(#DA02)
LD (HL),135
CALL PRINT
LD E,0
LD D,8
L91 LD HL,#5800
LD BC,768
L90 LD A,(HL)
AND 199
ADD A,E
LD (HL),A
INC HL
DEC BC
LD A,B
OR C
JR NZ,L90
LD A,E
ADD A,8
LD E,A
LD C,100
SLA A
ADD A,12
