mirror of
https://github.com/erkyrath/infocom-zcode-terps.git
synced 2026-02-18 05:24:07 +00:00
222 lines
2.2 KiB
NASM
222 lines
2.2 KiB
NASM
PAGE
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STTL "--- DEBUGGER: EZIP C128 ---"
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; --------------
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; C128 DEBUGGER
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; --------------
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; ENTRY: BREAKPOINT ID IN [A]
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BLINE: DB "B: OP: PC: S: V: 1: 2: 3: 4: 5: 6: 7: 8: 9: "
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DB EOL
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BLINL EQU $-BLINE
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DOBUG: ;RTS
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STA DHOLD
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; LDA SHFLAG
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; AND #%00000100 ; CTRL KEY PRESSED?
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; BEQ TEST2 ; CONTINUE IF NOT
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; RTS ; AND EXIT
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TEST2: ;LDA DHOLD
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;CMP #0
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;BEQ BUGIT
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;RTS
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NOP ; ON THE FLY CHANGE SPACE
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NOP
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NOP
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NOP
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NOP
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NOP
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NOP
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NOP
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NOP
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NOP
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NOP
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NOP
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NOP
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BUGIT:
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; SEC
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; JSR PLOT ; GET GAME POSITION
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; STX OLDX
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; STY OLDY
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; LDX #23
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; LDY #0
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; CLC
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; JSR PLOT ; AND SET DUBUG ONE
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LDA DHOLD
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LDX #2 ; INIT "CURSOR"
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JSR HEX ; SHOW BREAKPOINT
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LDA OPCODE
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BMI ITQ0
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LDA #'2'
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BNE SHOWOP
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ITQ0: CMP #$B0
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BCS ITQ1
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LDA #'1'
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BNE SHOWOP
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ITQ1: CMP #$C0
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BCS ITQ2
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LDA #'0'
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BNE SHOWOP
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ITQ2: CMP #$E0
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BCS ITQ3
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LDA #'E'
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BNE SHOWOP
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ITQ3: LDA #'X'
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SHOWOP: LDX #5 ; SET CURSOR
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STA BLINE,X
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LDX #9 ; CURSOR FOR OP ID
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LDA OPCODE
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JSR HEX
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LDX #15 ; CURSOR FOR PC
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LDA ZPCH
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JSR HEX
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LDA ZPCM
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JSR HEX
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LDA ZPCL
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JSR HEX
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LDX #24 ; CURSOR FOR [ZSP]
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LDA ZSP
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JSR HEX
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LDX #29 ; CURSOR FOR [MPC]
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LDA MPCH
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JSR HEX
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LDA MPCM
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JSR HEX
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LDA MPCL
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JSR HEX
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LDX #38
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LDA WBOTM
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; LDA BONE
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JSR HEX
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LDX #43
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LDA WTOP
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; LDA BTWO
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JSR HEX
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LDX #48
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LDA TOP
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; LDA BTHREE
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JSR HEX
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LDX #53
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LDA BFOUR
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JSR HEX
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LDX #58
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LDA BFIVE
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JSR HEX
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LDX #63
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LDA BSIX
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JSR HEX
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LDX #68
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LDA BSEVEN
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JSR HEX
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LDX #73
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LDA BEIGHT
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JSR HEX
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LDX #78
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LDA BNINE
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JSR HEX
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PPP: LDX #0
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DBG1: LDA BLINE,X ; PRINT DEBUGGER TEXT
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JSR CHROUT
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INX
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CPX #BLINL
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BCC DBG1
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NOP
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NOP
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NOP
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NOP
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NOP
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NOP
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NOP
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NOP
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LDA #0
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STA NDX ; CLEAR
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; JSR GETIN
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; CMP #0
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; BEQ WOK ; IF NO KEY, CONTINUE
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WAITT: JSR GETIN ; NOW WAIT FOR ANOTHER KEY
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CMP #0
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BEQ WAITT
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NOP
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NOP
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NOP
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NOP
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NOP
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NOP
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NOP
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NOP
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WOK: NOP
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CMP #'Q'
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BNE LLETEX
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BRK
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LLETEX:
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; LDX OLDX
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; LDY OLDY
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; CLC
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; JSR PLOT ; NOW BACK TO OUR REGULARLY SCHEDULED PROGRAM
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RTS
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; CONVERT [A] TO HEX & PRINT
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HEX: PHA
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LSR A
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LSR A
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LSR A
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LSR A
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JSR NIB
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PLA
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NIB: AND #%00001111
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TAY
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LDA HCHARS,Y
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STA BLINE,X
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INX
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RTS
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HCHARS: DB "0123456789ABCDEF"
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BONE: DB 0
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BTWO: DB 0
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BTHREE: DB 0
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BFOUR: DB 0
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BFIVE: DB 0
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BSIX: DB 0
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BSEVEN: DB 0
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BEIGHT: DB 0
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BNINE: DB 0
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DHOLD: DB 0
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END
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