mirror of
https://github.com/A2osX/A2osX.git
synced 2024-11-20 03:31:42 +00:00
397 lines
8.2 KiB
Plaintext
397 lines
8.2 KiB
Plaintext
NEW
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PREFIX
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AUTO 4,1
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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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GP.CodeStart 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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* AppleTalk MLICALL (AUXLC to MAINLC)
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* Used by user
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* In:
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* Y,A = Params
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*--------------------------------------
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jmp GP.AtkCall
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*--------------------------------------
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* ROMCALL (AUXLC to ROMLC)
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* Used by Kernel
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* In:
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* X = ROM Function
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* Y,A = Param
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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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* SLEEP
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*--------------------------------------
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GP.Sleep php
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sei
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phy
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ldy #S.PS.A
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sta (pPs),y
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txa
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iny #S.PS.X
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sta (pPs),y
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pla
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iny #S.PS.Y
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sta (pPs),y
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pla
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iny #S.PS.P
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sta (pPs),y
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pla get PC LO
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plx get PC HI
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inc Advance one byte because of return by RTI
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bne .1
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inx
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.1 iny #S.PS.PC
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sta (pPs),y
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txa
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iny #S.PS.PC+1
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sta (pPs),y
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tsx
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inx
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inx keep PC HI,LO from KERNEL jsr PSExec/PSResume
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inx Stack Ptr is $1ff if empty
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txa
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beq .3
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tay Save !Byte count for later
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.2 pla
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>PUSHA
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inx
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bne .2
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tya
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.3 >PUSHA push CPU Stack BC to restore on top of Soft Stack
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inc $1fe PC=PC+1
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bne .4
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inc $1ff because of RTI
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.4 lda (pPs)
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ora #S.PS.F.SLEEP
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sta (pPs)
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lda #0 cld,clc,cli
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pha
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rti exit to kernel with CC
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*--------------------------------------
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* *** MUST BE REINTRANT ***
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*--------------------------------------
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GP.SysCall dec IRQ.InKernel
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sty .5+1 save Y (Func Arg)
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sta .6+1 save A (Func Arg)
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stx .7+1 save X (Func ID)
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lda K.SYSCALL.BANK,x Get Target BNK
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bpl .1 0, E000, no BNK change
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cmp $D000 #RRAMWRAMBNK1 or #RRAMWRAMBNK2
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beq .1 same as actual BNK...go restore A and JMP
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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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.1 pha remember source BNK
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jsr .5 go to kernel.....
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stx .4+1 save X
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plx get back Source BNK
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bit $C000,x switch to Target BNK
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bit $C000,x
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bcc .4 no error quit...
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tax CS,A=0 ?
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bne .4 no, return error to caller
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pla get PC LO
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plx get PC HI
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sec
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sbc #3 move back JSR GP.SysCall
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bcs .2
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dex
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.2 phx
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pha
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ldy .5+1
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lda .6+1
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ldx .7+1
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jmp GP.Sleep
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.4 ldx #$FF Self Modified
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inc IRQ.InKernel
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rts Unmodified Carry
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.5 ldy #$FF Self Modified
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.6 lda #$FF Self Modified
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.7 ldx #$FF Self Modified
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jmp (K.SYSCALL.JMP,x)
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*--------------------------------------
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GP.LibCall dec IRQ.InKernel
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pha No need to save X, K.GetMemPtr will leave it unmodified
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tya Get LIB hMem in A
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jsr K.GetMemPtr 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 jsr $FFFF SELF MODIFIED
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inc IRQ.InKernel
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rts
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*--------------------------------------
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GP.AtkCall dec IRQ.InKernel
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>STYA .1
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jsr GO.ProDOS
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jsr MLI
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.DA #MLIATALK
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.1 .DA *
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jsr GO.A2osX
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inc IRQ.InKernel
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rts
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*--------------------------------------
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GP.RomCallPushFAC
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jsr GP.ROMCALL
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lda pStack
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sec
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sbc #5
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sta pStack
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sta FORPNT Ptr to dst buffer
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lda pStack+1
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sta FORPNT+1
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ldx #ROM.GETFAC
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*--------------------------------------
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GP.RomCall dec IRQ.InKernel
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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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inc IRQ.InKernel
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clc
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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 $E7AA FSUBT
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.DA $E7C1 FADDT
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.DA $E82E NORMALIZE.FAC.2 (L->F)
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.DA $E941 LOG
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.DA $E987 FMULTT.1
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.DA $E9E7 LOAD.ARG.FROM.INDEX
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.DA $EA6B FDIVT+2
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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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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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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 from 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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bit IRQ.SkipA2osX After A2osX IRQ.H ?
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bmi GP.IrqH.Exit
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sta SETALTZP switch to aux LC
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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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GP.IrqH.JSR jsr K.IrqH.DEV SELF MODIFIED
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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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rts
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GP.IrqH.Exit stz IRQ.SkipA2osX reset flag
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sec
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rts
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*--------------------------------------
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CORE.VBLState .BS 1
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CORE.IRQMode .BS 1
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CORE.TickPerSec .BS 1
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CORE.TickPer10t .BS 1
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CORE.TickSec .BS 1
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CORE.Tick10t .BS 1
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CORE.CPUStatCnt .DA #100
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CORE.LastPSID .DA #0
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*--------------------------------------
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IRQ.Mode .BS 1
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IRQ.SkipA2osX .BS 1
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IRQ.Tick .BS 1
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IRQ.InKernel .BS 1
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IRQ.IntNum .BS 1
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IRQ.VBL.n0 .BS 1
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IRQ.VBL.0n .BS 1
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IRQ.Vectors .BS K.IRQDEV.MAX*2
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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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GP.CodeEnd .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 A2osX.HZ=60hz
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.DA #2 A2osX.TTYDEVS=2
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.HS 000000000000
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.DA #0 ChRoot/Preemptive Disabled
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.HS 00000000000000 All Slots marked as "Free"
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*--------------------------------------
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GP.End .EQ *
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MAN
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SAVE USR/SRC/SYS/KERNEL.S.GP
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LOAD USR/SRC/SYS/KERNEL.S
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ASM
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