mirror of
https://github.com/A2osX/A2osX.git
synced 2024-11-04 03:05:43 +00:00
165 lines
3.7 KiB
Plaintext
165 lines
3.7 KiB
Plaintext
PR#3
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PREFIX /A2OSX.SRC
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NEW
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INC 1
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AUTO 6
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.LIST OFF
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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 A2osX.SYSCALL1
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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 A2osX.LIBCALL1
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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 A2osX.MLICALL1
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*--------------------------------------
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.BS $BE10-*
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*--------------------------------------
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jmp (pCode) pCodeJmp
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jmp (pLib) pLibJmp
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jmp (pDrv) pDrvJmp
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jmp (pDev) pDevJmp
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.BS $BE20-*
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*--------------------------------------
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GO.Reset jsr GO.A2osX
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jmp K.KernelRun
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*--------------------------------------
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* *** MUST BE REINTRANT ***
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*--------------------------------------
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A2osX.SYSCALL1 bit KERNEL.SYSCALL.FLAGS,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 KERNEL.SYSCALL.FLAGS+1,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 (KERNEL.SYSCALL,x)
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*--------------------------------------
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A2osX.LIBCALL1 pha No need to save X, K.GetMemPtrA will leave it unmodified
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tya Get LIB hMem in A
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jsr K.GetMemPtrA Get LIB Code Segment (MemMgr in $E000, no BNK change)
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>STYA pLib
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pla
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jmp (pLib)
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*--------------------------------------
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A2osX.MLICALL1 stx .1
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sta MLICALL.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 MLICALL.PARAMS
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jsr GO.A2osX
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rts
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*--------------------------------------
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GO.ProDOS lda $D000 We re coming from AUXLC, saving bank...
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sta GO.A2osX.BNK+1
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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 A2osX.SaveA
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stx A2osX.SaveX
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sty A2osX.SaveY
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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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ldy pStack
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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 sty pStack
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pha push P on stack
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ldy A2osX.SaveY
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ldx A2osX.SaveX
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lda A2osX.SaveA
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plp
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GO.EXIT.JMP jmp $FFFF Self Modified
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*--------------------------------------
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A2osX.SaveA .BS 1
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A2osX.SaveX .BS 1
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A2osX.SaveY .BS 1
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*--------------------------------------
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BrkHandler bra *
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*--------------------------------------
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IrqHandler bra *
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*--------------------------------------
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MAN
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SAVE SYS/KERNEL.S.GP
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LOAD SYS/KERNEL.S
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ASM
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