A2osX/SYS/KERNEL.S.GP.txt

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PR#3
PREFIX /A2OSX.BUILD
LOMEM $A00
INC 1
AUTO 6
*--------------------------------------
* SYSCALL (AUXLC to AUXLC)
* Used by user & kernel for inter bank Calls
* In:
* X = SYSfnc.Index
* Y,A = free for Inline param
*--------------------------------------
jmp GP.SysCall
*--------------------------------------
* LIBCALL (AUXLC to AUXLC)
* Used by user
* In:
* Y = LIB.ID
* X = LIBfnc.Index
* A = free for Inline param
*--------------------------------------
jmp GP.LibCall
*--------------------------------------
* AppleTalk MLICALL (AUXLC to MAINLC)
* Used by user
* In:
* Y,A = Params
*--------------------------------------
jmp GP.AtkCall
*--------------------------------------
* MLICALL (AUXLC to MAINLC)
* Used by Kernel
* In:
* X = MLI Function
* A = Param Count
*--------------------------------------
jmp GP.ROMCall
*--------------------------------------
* BADCALL
*--------------------------------------
lda #MLI.E.BADCALL
sec
rts
*--------------------------------------
jmp (pDev) pDevJmp
*--------------------------------------
pla get PC LO
sec
sbc pCode
ldy #S.PS.PC
sta (pPs),y
pla get PC HI
sbc pCode+1
iny
sta (pPs),y
lda (pPs)
ora #S.PS.F.SLEEP
sta (pPs)
clc
rts
*--------------------------------------
* *** MUST BE REINTRANT ***
*--------------------------------------
GP.SysCall bit K.SYSCALL.BANK,x
bpl .8 in $E000, no BNK change
sta .7+1 save A (Func Arg)
lda K.SYSCALL.BANK,x Get Target BNK
cmp $D000 #RRAMWRAMBNK1 or #RRAMWRAMBNK2
beq .7 same as actual BNK...go restore A and JMP
stx .6+1 save X (Func ID)
tax set Target BNK in x
lda $D000 get source BNK
bit $C000,x switch to Target BNK
bit $C000,x
pha
jsr .6 go to kernel.....
stx .5+1 save X
plx get back Source BNK
bit $C000,x
bit $C000,x
.5 ldx #$FF Self Modified
rts Unmodified Carry
.6 ldx #$FF Self Modified
.7 lda #$FF Self Modified
.8 jmp (K.SYSCALL.JMP,x)
*--------------------------------------
GP.LibCall pha No need to save X, K.GetMemPtr.A will leave it unmodified
tya Get LIB hMem in A
jsr K.GetMemPtr.A Get LIB Code Segment (MemMgr in $E000, no BNK change)
>STYA .1+1
pla
.1 jmp *
*--------------------------------------
GP.AtkCall >STYA .1
jsr GO.ProDOS
jsr MLI
.DA #MLIATALK
.1 .DA *
jsr GO.A2osX
rts
*--------------------------------------
GP.ROMCall phx
ldx $D000
stx .8+1
bit RROMBNK1
plx
jsr .1
.8 ldx #$ff
bit $C000,x
bit $C000,x
rts
.1 jmp (.2,x)
* http://www.txbobsc.com/scsc/scdocumentor/E7A0.html
.2 .DA $E7AA FSUBT
.DA $E7C1 FADDT
.DA $E82E NORMALIZE.FAC.2 (L->F)
.DA $E941 LOG
.DA $E987 FMULTT.1
.DA $E9E7 LOAD.ARG.FROM.INDEX
.DA $EA6B FDIVT+2
.DA $EAFD LOAD.FAC.FROM.INDEX
.DA $EB27 SETFOR (GETFAC)
.DA $EBB2 FCOMP
.DA $EBF2 QINT (F->L)
.DA $EC4A FIN StrToF
.DA $ED36 FOUT.1 PrintF
.DA $EE8D SQR
.DA $EE97 FPWRT
.DA $EF09 EXP
.DA $EFEA COS
.DA $EFF1 SIN
.DA $F03A TAN
.DA $F09E ATN
*--------------------------------------
GP.MLICall stx .1
sta K.MLI.PARAMS
jsr GO.ProDOS
jsr MLI
.1 .BS 1
.DA K.MLI.PARAMS
jsr GO.A2osX
rts
*--------------------------------------
GO.RamDrv.S jsr GO.ProDOS
stx $42
sta $43
jsr $FF00
jsr GO.A2osX
rts
*--------------------------------------
GO.DiskII.RW ldy #$D0
.HS 2C bit abs
GO.RamDrv.RW ldy #$FF
sty GO.RW.Drv+2
jsr GO.ProDOS
stx $42
sta $43
ldy #3
GO.RW.SrcDst lda $ffff,y Self Modified
sta $44,y
dey
bpl GO.RW.SrcDst
GO.RW.Drv jsr $0000
cli
jsr GO.A2osX
rts
*--------------------------------------
GO.ProDOS pha
lda $D000 We re coming from AUXLC, saving bank...
sta GO.A2osX.BNK+1
pla
php
clc
.HS 2C bit abs
GO.A2osX php
sec
sei
sta GO.EXIT.SaveA+1
stx GO.EXIT.SaveX+1
sty GO.EXIT.SaveY+1
pla Restore P in A for later
plx Get PC and add 1 for return
ply
inx
bne .1
iny
.1 stx GO.EXIT.JMP+1
sty GO.EXIT.JMP+2
bcs GO.A2osX.BNK if CS, go AUXLC
bit RRAMWRAMBNK1 Go MAINLC (ProDOS), always BNK1
bit RRAMWRAMBNK1
tsx
stx A2osX.SaveSX
ldx A2osX.SaveSM
txs
sta CLRALTZP
bra GO.EXIT
GO.A2osX.BNK ldx #RRAMWRAMBNK1 Self Modified, initialized to BNK1 for INIT3
bit $C000,x
bit $C000,x
sta SETALTZP
tsx
stx A2osX.SaveSM
ldx A2osX.SaveSX
txs
*--------------------------------------
GO.EXIT pha push P on stack
GO.EXIT.SaveY ldy #$ff
GO.EXIT.SaveX ldx #$ff
GO.EXIT.SaveA lda #$ff
plp
GO.EXIT.JMP jmp $FFFF Self Modified
*--------------------------------------
* Called for ProDOS IRQ Manager (LCBNK1)
* A,X,Y, $FA->$FF Already Saved
* Main RAM,ZP/LC selected
* must begin with CLD
* must exit with RTS
* - CC if IRQ cleared, CS if NOT
*--------------------------------------
GP.IrqH cld
lda RDALTZP
sta .2+1
bmi .1 we are already in AuxZP/LC
sta SETALTZP coming from MainLC, switch to aux
tsx
stx A2osX.SaveSM
ldx A2osX.SaveSX
txs
.1 jsr K.IrqH
.2 lda #$ff get back ZP status when called
bmi .3 we were coming from AuxZP/LC
tsx go back to Main
stx A2osX.SaveSX
ldx A2osX.SaveSM
txs
sta CLRALTZP
.3 rts
*--------------------------------------
*GO.Reset jsr GO.A2osX
* jmp CORE.Run
*--------------------------------------
*BrkHandler bra *
*--------------------------------------
.BS $BEE0-*
*--------------------------------------
* $BEE0->$BEEF : Public Variables
*--------------------------------------
.BS 16
*--------------------------------------
* $BEF0->$BEFF : Kernel Config Block
*--------------------------------------
.DA #6 60hz
.BS 7
.DA #0 ChRoot Disabled
.BS 7 All Slots marked as "Free"
*--------------------------------------
MAN
SAVE /A2OSX.SRC/SYS/KERNEL.S.GP
LOAD /A2OSX.SRC/SYS/KERNEL.S
ASM