Jet Set Willy: Unused RAM at FD00

| Unused

FD00: Unused TRS-DOS code

FD00 | ADD HL,BC |
FD01 | LD A,(DE) |
FD02 | CP $3B |
FD04 | JR Z,$FCD0 |
FD06 | CP $0D |
FD08 | JR Z,$FCD0 |
FD0A | PUSH HL |
FD0B | LD HL,$7800 |
FD0E | LD B,$02 |
FD10 | CALL $659E |
FD13 | POP BC |
FD14 | JR NC,$FD1C |
FD16 | LD DE,$67B3 |
FD19 | JP $6459 |
FD1C | CALL $754A |
FD1F | JR NZ,$FD16 |
FD21 | CALL $5BB4 |
FD24 | CALL NZ,$5BED |
FD27 | LD E,(HL) |
FD28 | INC HL |
FD29 | LD A,(HL) |
FD2A | LD ($542E),A |
FD2D | LD A,($5433) |
FD30 | OR A |
FD31 | JR Z,$FD43 |
FD33 | LD A,E |
FD34 | CP $20 |
FD36 | JR C,$FD3C |
FD38 | CP $25 |
FD3A | JR C,$FD43 |
FD3C | LD A,($5306) |
FD3F | OR A |
FD40 | JP Z,$6BE4 |
FD43 | LD HL,$7A30 |
FD46 | LD D,$00 |
FD48 | ADD HL,DE |
FD49 | ADD HL,DE |
FD4A | LD A,(HL) |
FD4B | INC HL |
FD4C | LD H,(HL) |
FD4D | LD L,A |
FD4E | LD A,E |
FD4F | LD DE,$7557 |
FD52 | EX DE,HL |
FD53 | EX (SP),HL |
FD54 | EX DE,HL |
FD55 | PUSH HL |
FD56 | INC C |
FD57 | DEC C |
FD58 | RET Z |
FD59 | CP $18 |
FD5B | LD A,$01 |
FD5D | LD HL,($5434) |
FD60 | RET NC |
FD61 | PUSH HL |
FD62 | PUSH AF |
FD63 | LD HL,($5441) |
FD66 | LD B,$02 |
FD68 | CALL $659E |
FD6B | JR NC,$FDA4 |
FD6D | PUSH DE |
FD6E | PUSH BC |
FD6F | CALL $7787 |
FD72 | LD HL,($5441) |
FD75 | LD A,C |
FD76 | ADD A,B |
FD77 | INC A |
FD78 | LD C,A |
FD79 | XOR A |
FD7A | LD B,A |
FD7B | SBC HL,BC |
FD7D | RST $18 |
FD7E | JR NC,$FD91 |
FD80 | LD HL,$681C |
FD83 | PUSH HL |
FD84 | LD A,($5312) |
FD87 | OR A |
FD88 | JR Z,$FD8D |
FD8A | CALL $7771 |
FD8D | POP HL |
FD8E | JP $5792 |
FD91 | LD ($5441),HL |
FD94 | POP BC |
FD95 | POP DE |
FD96 | PUSH BC |
FD97 | LD (HL),C |
FD98 | EX DE,HL |
FD99 | INC DE |
FD9A | LD B,$00 |
FD9C | LDIR |
FD9E | EX DE,HL |
FD9F | LD (HL),B |
FDA0 | INC HL |
FDA1 | LD (HL),B |
FDA2 | DEC HL |
FDA3 | POP BC |
FDA4 | POP DE |
FDA5 | PUSH HL |
FDA6 | XOR A |
FDA7 | LD B,A |
FDA8 | INC BC |
FDA9 | SBC HL,BC |
FDAB | LD A,($543E) |
FDAE | CP $02 |
FDB0 | JR NZ,$FDB9 |
FDB2 | LD A,($56C3) |
FDB5 | OR A |
FDB6 | CALL NZ,$6D20 |
FDB9 | INC D |
FDBA | DEC D |
FDBB | JR NZ,$FDD6 |
FDBD | LD A,(HL) |
FDBE | AND $80 |
FDC0 | LD DE,$683D |
FDC3 | CALL Z,$645E |
FDC6 | LD A,(HL) |
FDC7 | AND $40 |
FDC9 | LD DE,$6805 |
FDCC | CALL NZ,$645E |
FDCF | POP HL |
FDD0 | LD A,(HL) |
FDD1 | INC HL |
FDD2 | LD H,(HL) |
FDD3 | LD L,A |
FDD4 | POP DE |
FDD5 | RET |
FDD6 | LD A,(HL) |
FDD7 | OR A |
FDD8 | JP P,$6D12 |
FDDB | LD A,D |
FDDC | EX (SP),HL |
FDDD | POP BC |
FDDE | POP DE |
FDDF | PUSH DE |
FDE0 | PUSH HL |
FDE1 | PUSH AF |
FDE2 | LD A,(HL) |
FDE3 | INC HL |
FDE4 | LD H,(HL) |
FDE5 | LD L,A |
FDE6 | RST $18 |
FDE7 | POP DE |
FDE8 | JR Z,$FE06 |
FDEA | LD A,(BC) |
FDEB | AND $5F |
FDED | DEFB $45,$5F,$45,$FF,$45,$5F,$45,$5F,$45,$5F,$45,$5F,$45,$5F,$45,$5F |
FDFD | DEFB $45,$91,$35,$D2,$44,$A1,$42,$79,$44,$54,$00,$7A,$44,$BD,$44,$45 |
FE0D | DEFB $01,$00,$43,$F5,$FE,$04,$4F,$00,$43,$89,$47,$67,$72,$00,$00,$6F |
FE1D | DEFB $49,$26,$4D,$00,$4C,$00,$43,$36,$4D,$CC,$4C,$99,$4C,$BF,$64,$41 |
FE2D | DEFB $4C,$01,$53,$2B,$53,$78,$1D,$E6,$4B,$2D,$53,$1E,$1D,$00,$00,$00 |
FE3D | DEFB $7A,$44,$BD,$44,$45,$01,$00,$43,$F5,$FE,$04,$4F,$00,$43,$89,$47 |
FE4D | DEFB $67,$72,$00,$00,$6F,$49,$26,$4D,$00,$4C,$4A,$6D,$2B,$60,$E8,$5E |
FE5D | DEFB $42,$00,$28,$60,$4A,$6D,$0E,$5F,$2C,$00,$47,$6D,$8F,$1B,$46,$54 |
FE6D | DEFB $00,$00,$00,$18,$62,$FF,$FF,$06 |
FE75 | DEFM "TRSHDx" |
FE7B | LD HL,$4448 |
FE7E | LD ($3C3E),HL |
FE81 | LD A,$10 |
FE83 | OUT ($C1),A |
FE85 | LD B,$40 |
FE87 | CALL $0060 |
FE8A | LD HL,$8080 |
FE8D | LD ($3C3E),HL |
FE90 | LD A,$0C |
FE92 | OUT ($C1),A |
FE94 | EX (SP),HL |
FE95 | EX (SP),HL |
FE96 | IN A,($CF) |
FE98 | CP $50 |
FE9A | JR NZ,$FE7B |
FE9C | XOR A |
FE9D | OUT ($CE),A |
FE9F | LD A,$10 |
FEA1 | OUT ($CF),A |
FEA3 | LD B,$32 |
FEA5 | CALL $0060 |
FEA8 | IN A,($CF) |
FEAA | BIT 7,A |
FEAC | JR NZ,$FEA8 |
FEAE | BIT 0,A |
FEB0 | JR NZ,$FE7B |
FEB2 | RET |
FEB3 | DEFB $00,$00 |
FEB5 | DEFM "TRSHDx(C) Copyright 1982 by LSI" |
FED4 | LD A,$07 |
FED6 | CP B |
FED7 | JR Z,$FF1D |
FED9 | BIT 3,B |
FEDB | JR NZ,$FEDF |
FEDD | XOR A |
FEDE | RET |
FEDF | BIT 2,B |
FEE1 | PUSH HL |
FEE2 | JR NZ,$FF14 |
FEE4 | BIT 1,B |
FEE6 | JR Z,$FEEB |
FEE8 | LD HL,$0000 |
FEEB | PUSH DE |
FEEC | CALL $FF92 |
FEEF | LD A,$20 |
FEF1 | OUT ($CF),A |
FEF3 | EX (SP),HL |
FEF4 | EX (SP),HL |
FEF5 | IN A,($CF) |
FEF7 | RLCA |
FEF8 | JR C,$FEF5 |
FEFA | LD BC,$00C8 |
FEFD | INIR |
FEFF | IN A,($CF) |
FF01 | RRCA |
FF02 | LD HL,$FF81 |
FF05 | JR C,$FF4D |
FF07 | POP DE |
FF08 | PUSH DE |
FF09 | LD A,D |
FF0A | CP (IY+$09) |
FF0D | LD A,$06 |
FF0F | JR Z,$FF54 |
FF11 | XOR A |
FF12 | JR $FF54 |
FF14 | CALL $FF1D |
FF17 | JR Z,$FF34 |
FF19 | POP HL |
FF1A | LD A,$0F |
FF1C | RET |
FF1D | LD A,(IY+$03) |
FF20 | AND $03 |
FF22 | LD C,A |
FF23 | IN A,($C0) |
FF25 | CALL C,$0D07 |
FF28 | JR NZ,$FF26 |
FF2A | OR (IY+$03) |
FF2D | BIT 7,A |
FF2F | LD A,$40 |
FF31 | RET NZ |
FF32 | XOR A |
FF33 | RET |
FF34 | PUSH DE |
FF35 | LD A,B |
FF36 | CP $0F |
FF38 | JR Z,$FF58 |
FF3A | CP $0C |
FF3C | LD A,$08 |
FF3E | JR Z,$FF54 |
FF40 | CALL $FF92 |
FF43 | LD A,$30 |
FF45 | CALL $FFDA |
FF48 | JR Z,$FF54 |
FF4A | LD HL,$FF89 |
FF4D | IN A,($C9) |
FF4F | RLCA |
FF50 | INC HL |
FF51 | JR NC,$FF4F |
FF53 | LD A,(HL) |
FF54 | OR A |
FF55 | POP DE |
FF56 | POP HL |
FF57 | RET |
FF58 | LD A,(IY+$07) |
FF5B | LD B,A |
FF5C | AND $1F |
FF5E | LD E,A |
FF5F | XOR B |
FF60 | RLCA |
FF61 | RLCA |
FF62 | RLCA |
FF63 | INC A |
FF64 | LD B,A |
FF65 | PUSH BC |
FF66 | PUSH DE |
FF67 | CALL $FF92 |
FF6A | PUSH HL |
FF6B | LD A,(HL) |
FF6C | OUT ($CA),A |
FF6E | INC HL |
FF6F | LD A,$50 |
FF71 | CALL $FFDA |
FF74 | POP HL |
FF75 | POP DE |
FF76 | POP BC |
FF77 | JR NZ,$FF4A |
FF79 | LD A,$20 |
FF7B | ADD A,E |
FF7C | LD E,A |
FF7D | DJNZ $FF65 |
FF7F | XOR A |
FF80 | JR $FF54 |
FF82 | DEFB $07,$04,$01,$05,$7F,$08,$02,$03 |
FF8A | DEFB $0E,$0C,$09,$0D,$7F,$08,$0A,$0B |
FF92 | PUSH HL |
FF93 | LD L,D |
FF94 | LD H,$00 |
FF96 | BIT 5,(IY+$04) |
FF9A | JR Z,$FF9D |
FF9C | ADD HL,HL |
FF9D | LD A,(IY+$07) |
FFA0 | PUSH DE |
FFA1 | LD D,A |
FFA2 | AND $1F |
FFA4 | LD E,A |
FFA5 | INC E |
FFA6 | LD C,E |
FFA7 | XOR D |
FFA8 | RLCA |
FFA9 | RLCA |
FFAA | RLCA |
FFAB | INC A |
FFAC | CALL $4B6B |
FFAF | DEC A |
FFB0 | POP DE |
FFB1 | CP E |
FFB2 | JR NC,$FFB8 |
FFB4 | CPL |
FFB5 | ADD A,E |
FFB6 | LD E,A |
FFB7 | INC HL |
FFB8 | LD A,C |
FFB9 | CALL $4B7A |
FFBC | LD D,A |
FFBD | LD A,(IY+$04) |
FFC0 | AND $0F |
FFC2 | ADD A,D |
FFC3 | LD D,A |
FFC4 | LD A,(IY+$03) |
FFC7 | AND $03 |
FFC9 | RLCA |
FFCA | RLCA |
FFCB | RLCA |
FFCC | OR D |
FFCD | OUT ($CE),A |
FFCF | LD A,E |
FFD0 | OUT ($CB),A |
FFD2 | LD A,L |
FFD3 | OUT ($CC),A |
FFD5 | LD A,H |
FFD6 | OUT ($CD),A |
FFD8 | POP HL |
FFD9 | RET |
FFDA | OUT ($CF),A |
FFDC | LD BC,$00C8 |
FFDF | OTIR |
FFE1 | EX (SP),HL |
FFE2 | EX (SP),HL |
FFE3 | IN A,($CF) |
FFE5 | RLCA |
FFE6 | JR C,$FFE3 |
FFE8 | IN A,($CF) |
FFEA | AND $01 |
FFEC | RET |
FFED | DEFS $13 |