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basic1_asm
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*******************************
*
* BASIC1_ASM basic1_asm
*
*******************************
* initialise basic, search for ROMS, display F1/F2 menu
L04A74 BRA.S L04AAA
XL04A74 EQU L04A74
L04A76 CMPI.L #$4AFB0001,(A3)
BNE.S L04A9E
LEA $0008(A3),A1 * number of commands
JSR L039B2(PC) * link in name table
MOVE.W $0004(A3),D0 * number of functions
BEQ.S L04A94
LEA $00(A3,D0.W),A1 * list of functions
JSR L06DA6(PC)
L04A94 MOVE.W $0006(A3),D0 * initialisation routine
BEQ.S L04A9E * no routine supplied
JSR $00(A3,D0.W) * init routine
L04A9E RTS
L04AA0 JSR L039F6(PC) * install window
MOVE.L D4,D1 * D1 = #
JMP L06646(PC)
* basic init
L04AAA JSR L0566E(PC)
JSR L06DA2(PC)
LEA L04BBA(PC),A1 * window def
MOVEQ #$00,D4
BSR.S L04AA0 * init window 0
LEA $0C000,A3 * ROM EXTENSION
BSR.S L04A76 * try to initialise extension
MOVEA.L #$C0000,A3 * EXTENSIONS at C0000 ff
L04AC8 BSR.S L04A76 * SAME AS BEFORE
ADDA.W #$4000,A3 * add 16 K
CMPA.L #$CC000,A3 * till end of RAM
*
* !!! to avoid software - problems caused by bad decoding of ROM-port
* hardware: - modification of ROM-Port
* - or make sure to have no expansion at CC000
* software: - omit the first test for C000 (is done when testing CC000)
* - or set top to $CC000 instead of $100000
* !!!! (t h a t ' s w h a t I d i d h e r e !)
BLT.S L04AC8
LEA L04BC6(PC),A1 * WINDOW 1
MOVEQ #$01,D4
BSR.S L04AA0
MOVEQ #-$19,D0 * START-MESSAGE
JSR L03968(PC)
L04AE4 LEA L04BD2(PC),A1 * WINDOW 2
MOVEQ #$02,D4
BSR.S L04AA0
MOVEQ #-$18,D0 * F1-MONI ETC
JSR L03968(PC) * open START window
GETMOD MOVEQ #$01,D0 * TRAP NR
MOVEQ #-$01,D3 * TIMEOUT
TRAP #$03 * NOW INKEY$
MOVEQ #$00,D6 * INIT MODE 4
MOVEQ #$00,D7
MOVEQ #$20,D5
SUBI.B #$E8,D1 * F1 ?
BEQ.S INIMON
SUBQ.B #$4,D1 * F2 ?
BNE.S GETMOD
MOVEQ #$00,D6
MOVEQ #$01,D7
MOVEQ #$44,D5 * d5=displacement for windows
INIMON MOVE.B D6,D1
MOVE.B D7,D2
MOVEQ #$10,D0
TRAP #$01 * SCREEN-INIT
LEA XL04B72-$08(PC,D5.W),A1 * #2 DEFI
BSR.S L04B6E
MOVEA.L #$00010001,A0
LEA XL04B72-$14(PC,D5.W),A1 * #1 DEFI
BSR.S L04B6E
SUBA.L A0,A0
LEA XL04B72-$20(PC,D5.W),A1 * #0 DEFI
BSR.S L04B6E
LEA L04BDE(PC),A0 * boot-definiton
BSR.S L04B46 * try to boot from any device
BEQ.S L04B40 * success
LEA L04BE4(PC),A0 * try mdv1_boot
BSR.S L04B46
BNE.S L04B52 * nothing
L04B40 CLR.W $0088(A6) * clear line-number
BRA.S L04B54
L04B46 MOVEQ #$01,D0 * try to open boot
MOVEQ #-$01,D1
MOVEQ #$00,D3
TRAP #$02
TST.L D0
RTS
L04B52 SUBA.L A0,A0 * A0=0: no boot actioned
L04B54 MOVE.L (A6),$0004(A6)
MOVEQ #$00,D7
MOVEQ #$7E,D1
JSR L04E6A(PC)
MOVE.L A0,$0084(A6)
LEA L04BF0(PC),A5
MOVE.L A5,-(A7)
L04B6A JMP L04C04(PC) * try to execute line or prog
L04B6E JMP L03A02(PC)
L04B72
XL04B72 EQU L04B72
* Moni#0
DC.B $00,$00,$00,$04 * size border/size colour/paper/ink
DC.B $02,$00,$00,'2' * width hight
DC.B $00,$00,$00,$CE * origin horiz and verti
* Moni#1
DC.B $FF,$01,$02,$07
DC.B $01,$00,$00,$CA
DC.B $01,$00,$00,$00
* Moni#2
DC.B $FF,$01,$02,$07
DC.B $01,$00,$00,$CA
DC.B $00,$00,$00,$00
* TV#0
DC.B $00,$00,$00,$07
DC.B $01,$C0,$00,'('
DC.B $00,' ',$00,$D8
*TV#1
DC.B $00,$00,$02,$07
DC.B $01,$C0,$00,$C8
DC.B $00,' ',$00,$10
* TV#2
DC.B $00,$00,$01,$07
DC.B $01,$C0,$00,$C8
DC.B $00,' ',$00,$10
* init window
L04BBA DC.B $00,$00,$00,$04
DC.B $01,$C0,$00,$AA
DC.B $00,' ',$00,' '
* copyright window
L04BC6 DC.B $07,$02,$02,$07
DC.B $01,'p',$00,$0E
DC.B $00,'H',$00,$EE
* window for extensions message
L04BD2 DC.B $04,$04,$07,$02
DC.B $00,$A8,$00,$1C
DC.B $00,$AE,$00,$CE
L04BDE DC.W $0004
DC.B 'BOOT'
L04BE4 DC.W $0009
DC.B 'MDV1_BOOT'
DC.B $00
L04BF0 JSR L0A9BA(PC) * SYSTEM COMMAND
LEA L04BF0(PC),A5 * 4BF0 - adrr fo errors
MOVE.L A5,-(A7)
L04BFA CLR.L $0084(A6)
MOVEQ #$00,D1
JSR L0661E(PC)
L04C04 CLR.L $0076(A6)
MOVE.L (A6),$0004(A6)
TST.B $00AA(A6)
BEQ.S L04C2C
MOVE.W $00AC(A6),D4
MOVE.W D4,D6
SF $00AB(A6)
JSR L07518(PC)
MOVE.W $00AE(A6),D0
SNE $00AA(A6)
ADD.W D0,$00AC(A6)
L04C2C MOVE.L A0,D0
JSR L079C4(PC)
BEQ.S L04C64
BGT.S L04C3C
CMPI.B #$F6,D0
BEQ.S L04C50
L04C3C SF $00AA(A6)
JSR L09B9C(PC) * error-report
L04C44 BSR L04CFA
BEQ.S L04C4E
MOVEQ #$02,D0
TRAP #$02
L04C4E BRA.S L04BFA
L04C50 MOVEQ #$02,D0 * CLOSE MDV1_BOOT
TRAP #$02
CLR.L $0084(A6) * command channel=0
TST.W $0088(A6) * LINE TO EXECUTE ?
BLT L04D6A * NO
BRA L04D9E * YES
L04C64 TAS $008F(A6) * initialise BREAK
MOVE.L A1,D1
SUB.L (A6),D1
SF $00B9(A6) * BV.ARROW
MOVE.B -$01(A6,A1.L),D0
SUBI.B #$D0,D0
BCS.S L04C86
ST $00B9(A6) * BV.ARROW
BEQ.S L04C86
MOVE.B #$01,$00B9(A6)
L04C86 SUBQ.W #1,D1
BLE L04C04
CMPI.B #$20,-$02(A6,A1.L)
BNE.S L04C98
SUBQ.W #1,A1
BRA.S L04C86
L04C98 MOVE.B #$0A,-$01(A6,A1.L)
MOVE.L A1,$0004(A6)
L04CA2 JSR L0890C(PC)
LEA L08B5A(PC),A2
JSR L087D4(PC)
BEQ.S L04CD0
BLT.S L04CB8
JSR L097DC(PC)
BRA.S L04CA2
* error handling of direct commands
L04CB8 TST.L $0084(A6) * was it # 0
BNE.S L04CCC
MOVEQ #-$15,D0 * report bad line
JSR L09B9C(PC)
SUBQ.L #1,$0004(A6)
BRA L04C2C * edit offending line
* error handling of direct input from other # than 0
L04CCC JSR L08A4E(PC)
L04CD0 JSR L08AB4(PC)
JSR L08E88(PC)
BRA.S L04D02 * ERROR
SF $006F(A6)
ST $008E(A6)
MOVE.L D0,D5
BSR.S L04CFA
BNE L04C04
MOVEQ #$02,D1
JSR L0661E(PC)
BLT.S L04CF6
JSR L08FE6(PC)
L04CF6 BRA L04BFA
* get input #
L04CFA MOVEA.L $0084(A6),A0
MOVE.L A0,D0
RTS
* supervisor for direct commands
* enter command mode
L04D02 MOVEA.L $0008(A6),A4 * BV.TKBAS
MOVE.B #$01,$006C(A6) * BV.STMNT
SF $006E(A6) * BV.INLIN
ST $006D(A6) * BV.CONT
L04D14 ST $006F(A6) * BV.SING
CLR.L $0068(A6) * BV.LINUM
JSR L0A4BA(PC)
JSR L0A8B8(PC)
BNE L04C44
TST.B $008B(A6) * BV.COMLN
BEQ.S L04D5E
SUBQ.W #4,$008C(A6) * BV.STOPN
BEQ.S L04CF6
BLT.S L04D14
MOVEA.L $0008(A6),A0 * BV.TKBAS
MOVE.L $000C(A6),D0 * BV.TKTOP
SUBA.L A0,A4
SUB.L A0,D0
MOVE.L D0,D1
SUBA.L D0,A7
L04D46 MOVE.W $00(A6,A0.L),(A7)+
ADDQ.W #2,A0
SUBQ.W #2,D1
BGT.S L04D46
SUBA.L D0,A7
MOVE.W D0,-(A7)
MOVE.W A4,-(A7)
MOVE.B $006C(A6),-(A7)
MOVE.L $006E(A6),-(A7)
L04D5E TST.W $0088(A6)
BGE.S L04D98
BSR.S L04CFA
L04D66 BNE L04C04
L04D6A TST.B $008B(A6)
BEQ.S L04CF6
SF $008B(A6)
MOVE.L (A7)+,$006E(A6)
MOVE.B (A7)+,$006C(A6)
MOVEA.L $0008(A6),A0
MOVEA.L A0,A4
ADDA.W (A7)+,A4
MOVE.W (A7)+,D0
L04D86 MOVE.W (A7)+,$00(A6,A0.L)
ADDQ.W #2,A0
SUBQ.W #2,D0
BGT.S L04D86
MOVE.L A0,$000C(A6)
BRA L04D14
* execution of Basic progs
L04D98 BSR L04CFA * store channel ID
BNE.S L04D66 * not #0
L04D9E JSR L0A4BA(PC) * init variables and procs
MOVEA.L $0010(A6),A4 * BV.PFBAS
SF $006F(A6)
CLR.L $0068(A6)
MOVE.B #$01,$006C(A6)
MOVE.W $0088(A6),D4
BEQ.S L04DD6
JSR L09FBE(PC)
BNE L04BFA
MOVE.B $008A(A6),D4
BEQ.S L04DD6
JSR L0A96A(PC) * first instruction in line
JSR L0A00A(PC)
L04DD0 JSR L0A90C(PC) * execute prog
BRA.S L04DDA
L04DD6 JSR L0A8A8(PC) * execute prog
L04DDA BNE L04BFA * error or end
TST.W $008C(A6) * system command ?
BNE L04D5E * no
BRA.S L04DD0 * continue
* !! only once needed ??? !!!
L04DE8 JSR L04E5E(PC) * reserve memory for name table entry
MOVEA.L $001C(A6),A2
ADDQ.L #8,$001C(A6)
RTS
L04DF6 MOVE.L D1,-(A7) * reserve memory for variables
ADDQ.L #7,D1
ANDI.W #$FFF8,D1
L04DFE MOVEA.W #$0072,A0
MOVEQ #$0C,D0
TRAP #$01
TST.L D0
BLT.S L04E0C * memory insufficient
BRA.S L04E26
L04E0C MOVE.L D1,-(A7)
JSR L04E76(PC)
MOVEA.L $002C(A6),A0
ADD.L D1,$002C(A6)
MOVEA.W #$0072,A1
MOVEQ #$0D,D0
TRAP #$01
MOVE.L (A7)+,D1
BRA.S L04DFE
L04E26 MOVE.L (A7)+,D1
RTS
L04E2A DC.W $0100 * table for memory reservation
DC.W $0100
DC.W $0100
DC.W $0100
* !!! table above and command below are fuzzy - in all cases same amount
* of memory is reserved so it can be shortened - instead of
* first four lines only move.l #$0100,d1 would be sufficient !!!
L04E32 LEA L04E2A(PC),A1
ADD.W D0,D0
MOVEQ #$00,D1
MOVE.W $00(A1,D0.W),D1 * fuzzy
MOVEQ #$60,D2
MOVE.L A7,$0060(A6)
MOVE.L A6,D0
SUB.L D0,$0060(A6)
BRA.S L04E90 * reserve 256 bytes
L04E4C MOVEQ #$20,D1 * reserve 32 bytes artihm stack
L04E4E MOVEQ #$58,D2
BRA.S L04E90
L04E52 MOVEQ #$0C,D1 * 12 Bytes on stack
L04E54 MOVEQ #$48,D2
BRA.S L04E90
* !!! only once needed ??? !!! - YES! AVOID JSR
L04E58 MOVEQ #4,D1 * reserve 4 BYTES
L04E5A MOVEQ #$50,D2
BRA.S L04E90
L04E5E MOVEQ #$08,D1
L04E60 MOVEQ #$1C,D2
BRA.S L04E84
* !!! only once needed ??? !!! - YES! AVOID JSR
L04E64 MOVEQ #$16,D1
MOVEQ #$3C,D2
BRA.S L04E84
L04E6A MOVEQ #$04,D2
BRA.S L04E84
* !!! only once needed ??? !!! - YES! AVOID JSR
L04E6E MOVEQ #$0C,D2
BRA.S L04E84
L04E72 MOVEQ #$24,D2
BRA.S L04E84
* !!! only once needed ??? !!! - YES! AVOID JSR
L04E76 MOVEQ #$2C,D2
BRA.S L04E84
* !!! only once needed ??? !!! - YES! AVOID JSR
L04E7A MOVEQ #$34,D2
BRA.S L04E84
* !!! only once needed ??? !!! - YES! AVOID JSR
L04E7E MOVEQ #$44,D2
BRA.S L04E84
L04E82 MOVEQ #$14,D2
L04E84 MOVEQ #$00,D0
MOVE.L $04(A6,D2.L),D3
SUB.L $00(A6,D2.L),D3
BRA.S L04E9A
* RESERVE MEMORY ON BASE OF STACK
L04E90 MOVEQ #-$01,D0
MOVE.L $00(A6,D2.L),D3
SUB.L -$04(A6,D2.L),D3
L04E9A CMP.L D1,D3 * enough memory for reservation
BGE.S L04EE2
MOVEM.L A0-A3,-(A7)
ADDI.L #$F,D1
ANDI.W #$FFF0,D1
L04EAC MOVE.L $0048(A6),D3
SUB.L $0044(A6),D3
CMP.L D1,D3
BGT.S L04F14
MOVEM.L D0-D2,-(A7)
MOVEQ #$16,D0
TRAP #$01
TST.L D0
BEQ.S L04EE4
MOVE.W #$0012,$008C(A6)
TRAP #$00
MOVEA.L $0064(A6),A5
ADDA.L A6,A5
SUBA.L $0076(A6),A5
SUBQ.W #4,A5
MOVE.L A5,USP
MOVE.W #$0004,SR
SF $006D(A6)
L04EE2 RTS
L04EE4 MOVEA.L $0048(A6),A0
MOVEA.L $0064(A6),A1
LEA $00(A1,D1.L),A2
L04EF0 SUBQ.W #4,A2
SUBQ.W #4,A1
MOVE.L $00(A6,A1.L),$00(A6,A2.L)
CMPA.L A0,A1
BGT.S L04EF0
MOVEQ #$48,D0
MOVEQ #$64,D2
L04F02 ADD.L D1,$00(A6,D0.L)
ADDQ.W #4,D0
CMP.L D2,D0
BLE.S L04F02
ADDA.L D1,A7
MOVEM.L (A7)+,D0-D2
BRA.S L04EAC
L04F14 TST.B D0
BMI.S L04F54
CMPI.L #$44,D2
BEQ.S L04F84
MOVEA.L $44(A6),A1
MOVEA.L $04(A6,D2.L),A0
LEA $00(A1,D1.L),A2
L04F2C SUBQ.W #4,A1
SUBQ.W #4,A2
MOVE.L $00(A6,A1.L),$00(A6,A2.L)
CMPA.L A0,A1
BGT.S L04F2C
MOVEQ #$04,D0
ADD.W D2,D0
MOVEQ #$48,D2
TST.L $0072(A6)
BEQ.S L04F7A
CMPI.L #$28,D0
BGT.S L04F7A
ADD.L D1,$0072(A6)
BRA.S L04F7A
L04F54 CMPI.L #$48,D2
BEQ.S L04F84
MOVEA.L -$04(A6,D2.L),A1
MOVEA.L $0048(A6),A0
NEG.L D1
LEA $00(A0,D1.L),A2
L04F6A MOVE.L $00(A6,A0.L),$00(A6,A2.L)
ADDQ.W #4,A0
ADDQ.W #4,A2
CMPA.L A1,A0
BLE.S L04F6A
MOVEQ #$48,D0
L04F7A ADD.L D1,$00(A6,D0.L)
ADDQ.W #4,D0
CMP.L D2,D0
BLT.S L04F7A
L04F84 MOVEM.L (A7)+,A0-A3
RTS
L04F8A MOVEQ #$14,D2
BRA.S L04FA0
L04F8E MOVEQ #$24,D2
BRA.S L04FA0
L04F92 MOVEQ #$1C,D2
BRA.S L04FA0
L04F96 MOVEQ #$2C,D2
BRA.S L04FA0
L04F9A MOVEQ #$34,D2
BRA.S L04FA0
L04F9E MOVEQ #$3C,D2
L04FA0 MOVEA.L $04(A6,D2.L),A1
MOVE.L A1,D1
MOVE.L $00(A6,D2.L),D0
ADDQ.W #1,D0
BCLR #$00,D0
MOVEA.L D0,A0
SUB.L A0,D1
BEQ.S L04FE6
L04FB6 MOVE.L $00(A6,A1.L),$00(A6,A0.L)
ADDQ.W #4,A1
ADDQ.W #4,A0
CMPA.L $0044(A6),A1
BLT.S L04FB6
MOVEQ #$04,D0
ADD.B D2,D0
TST.L $0072(A6)
BEQ.S L04FDA
CMPI.B #$28,D2
BGE.S L04FDA
SUB.L D1,$0072(A6)
L04FDA MOVEQ #$48,D2
L04FDC SUB.L D1,$00(A6,D0.L)
ADDQ.B #4,D0
CMP.B D2,D0
BLT.S L04FDC
L04FE6 RTS
L04FE8 ADDQ.L #7,D1
ANDI.L #$FFFFFFF8,D1
BEQ.S L04FFA
MOVEA.W #$0072,A1
MOVEQ #$0D,D0
TRAP #$01
L04FFA RTS
L04FFC DC.W $4E75
DC.W $0000
***End BASIC1_ASM basic1_asm