mirror of
https://github.com/A2osX/A2osX.git
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266 lines
5.9 KiB
Plaintext
266 lines
5.9 KiB
Plaintext
PR#3
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PREFIX /A2OSX.BUILD
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LOMEM $A00
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INC 1
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AUTO 6
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*--------------------------------------
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* SYSCALL (AUXLC to AUXLC)
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* Used by user & kernel for inter bank Calls
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* In:
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* X = SYSfnc.Index
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* Y,A = free for Inline param
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*--------------------------------------
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jmp GP.SysCall
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*--------------------------------------
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* LIBCALL (AUXLC to AUXLC)
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* Used by user
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* In:
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* Y = LIB.ID
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* X = LIBfnc.Index
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* A = free for Inline param
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*--------------------------------------
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jmp GP.LibCall
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*--------------------------------------
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* MLICALL (AUXLC to MAINLC)
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* Used by Kernel
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* In:
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* X = MLI Function
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* A = Param Count
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*--------------------------------------
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jmp GP.MLICall
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*--------------------------------------
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* MLICALL (AUXLC to MAINLC)
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* Used by Kernel
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* In:
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* X = MLI Function
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* A = Param Count
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*--------------------------------------
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jmp GP.ROMCall
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*--------------------------------------
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* BADCALL
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*--------------------------------------
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lda #MLI.E.BADCALL
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sec
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rts
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*--------------------------------------
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jmp (pDev) pDevJmp
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*--------------------------------------
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* *** MUST BE REINTRANT ***
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*--------------------------------------
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GP.SysCall bit K.SYSCALL.BANK,x
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bpl .8 in $E000, no BNK change
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sta .7+1 save A (Func Arg)
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lda K.SYSCALL.BANK,x Get Target BNK
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cmp $D000 #RRAMWRAMBNK1 or #RRAMWRAMBNK2
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beq .7 same as actual BNK...go restore A and JMP
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stx .6+1 save X (Func ID)
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tax set Target BNK in x
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lda $D000 get source BNK
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bit $C000,x switch to Target BNK
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bit $C000,x
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pha
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jsr .6 go to kernel.....
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stx .5+1 save X
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plx get back Source BNK
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bit $C000,x
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bit $C000,x
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.5 ldx #$FF Self Modified
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rts Unmodified Carry
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.6 ldx #$FF Self Modified
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.7 lda #$FF Self Modified
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.8 jmp (K.SYSCALL.JMP,x)
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*--------------------------------------
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GP.LibCall pha No need to save X, K.GetMemPtr.A will leave it unmodified
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tya Get LIB hMem in A
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jsr K.GetMemPtr.A Get LIB Code Segment (MemMgr in $E000, no BNK change)
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>STYA .1+1
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pla
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.1 jmp $ffff
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*--------------------------------------
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GP.MLICall stx .1
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sta K.MLI.PARAMS
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jsr GO.ProDOS
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jsr MLI
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.1 .BS 1
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.DA K.MLI.PARAMS
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jsr GO.A2osX
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rts
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*--------------------------------------
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GP.ROMCall phx
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ldx $D000
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stx .8+1
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bit RROMBNK1
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plx
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jsr .1
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.8 ldx #$ff
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bit $C000,x
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bit $C000,x
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rts
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.1 jmp (.2,x)
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* http://www.txbobsc.com/scsc/scdocumentor/E7A0.html
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.2 .DA $E7A7 FSUB
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.DA $E7BE FADD
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.DA $E82E NORMALIZE.FAC.2 (L->F)
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.DA $E941 LOG
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.DA $E97F FMULT
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.DA $E9E7 LOAD.ARG.FROM.INDEX
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.DA $EA66 FDIV
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.DA $EAFD LOAD.FAC.FROM.INDEX
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.DA $EB27 SETFOR GETFAC)
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.DA $EBB2 FCOMP
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.DA $EBF2 QINT (F->L)
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.DA $EC4A FIN StrToF
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.DA $ED36 FOUT.1 PrintF
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.DA $EE8D SQR
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.DA $EE97 FPWRT
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.DA $EF09 EXP
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.DA $EFEA COS
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.DA $EFF1 SIN
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.DA $F03A TAN
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.DA $F09E ATN
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*--------------------------------------
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GO.DiskII.RW jsr GO.ProDOS
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stx $42
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sta $43
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ldy #3
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GO.DiskII.RW.1 lda $ffff,y Self Modified
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sta $44,y
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dey
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bpl GO.DiskII.RW.1
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jsr $D000
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cli
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jsr GO.A2osX
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rts
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*--------------------------------------
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GO.ProDOS pha
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lda $D000 We re coming from AUXLC, saving bank...
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sta GO.A2osX.BNK+1
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pla
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php
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clc
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.HS 2C bit abs
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GO.A2osX php
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sec
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sei
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sta GO.EXIT.SaveA+1
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stx GO.EXIT.SaveX+1
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sty GO.EXIT.SaveY+1
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pla Restore P in A for later
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plx Get PC and add 1 for return
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ply
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inx
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bne .1
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iny
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.1 stx GO.EXIT.JMP+1
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sty GO.EXIT.JMP+2
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bcs GO.A2osX.BNK if CS, go AUXLC
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bit RRAMWRAMBNK1 Go MAINLC (ProDOS), always BNK1
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bit RRAMWRAMBNK1
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tsx
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stx A2osX.SaveSX
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ldx A2osX.SaveSM
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txs
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sta CLRALTZP
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bra GO.EXIT
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GO.A2osX.BNK ldx #RRAMWRAMBNK1 Self Modified, initialized to BNK1 for INIT3
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bit $C000,x
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bit $C000,x
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sta SETALTZP
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tsx
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stx A2osX.SaveSM
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ldx A2osX.SaveSX
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txs
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*--------------------------------------
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GO.EXIT pha push P on stack
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GO.EXIT.SaveY ldy #$ff
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GO.EXIT.SaveX ldx #$ff
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GO.EXIT.SaveA lda #$ff
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plp
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GO.EXIT.JMP jmp $FFFF Self Modified
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*--------------------------------------
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* Called for ProDOS IRQ Manager (LCBNK1)
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* A,X,Y, $FA->$FF Already Saved
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* Main RAM,ZP/LC selected
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* must begin with CLD
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* must exit with RTS
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* - CC if IRQ cleared, CS if NOT
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*--------------------------------------
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GP.IrqH cld
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lda RDALTZP
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sta .2+1
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bmi .1 we are already in AuxZP/LC
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sta SETALTZP coming from MainLC, switch to aux
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tsx
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stx A2osX.SaveSM
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ldx A2osX.SaveSX
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txs
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.1 jsr K.IrqH
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.2 lda #$ff get back ZP status when called
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bmi .3 we were coming from AuxZP/LC
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tsx go back to Main
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stx A2osX.SaveSX
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ldx A2osX.SaveSM
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txs
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sta CLRALTZP
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.3 rts
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*--------------------------------------
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*GO.Reset jsr GO.A2osX
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* jmp CORE.Run
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*--------------------------------------
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*BrkHandler bra *
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*--------------------------------------
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.BS $BEE0-*
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*--------------------------------------
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* $BEE0->$BEEF : Public Variables
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*--------------------------------------
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.BS 16
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*--------------------------------------
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* $BEF0->$BEFF : Kernel Config Block
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*--------------------------------------
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.DA #6 60hz
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.BS 7
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.DA #0 ChRoot Disabled
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.BS 7 All Slots marked as "Free"
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*--------------------------------------
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MAN
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SAVE /A2OSX.SRC/SYS/KERNEL.S.GP
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LOAD /A2OSX.SRC/SYS/KERNEL.S
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ASM
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