A2osX/SYS/KERNEL.S.GP.txt

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NEW
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AUTO 3,1
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*--------------------------------------
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* SYSCALL (AUXLC to AUXLC)
* Used by user & kernel for inter bank Calls
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* In:
* X = SYSfnc.Index
* Y,A = free for Inline param
*--------------------------------------
GP.CodeStart jmp GP.SysCall
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*--------------------------------------
* LIBCALL (AUXLC to AUXLC)
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* Used by user
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* In:
* Y = LIB.ID
* X = LIBfnc.Index
* A = free for Inline param
*--------------------------------------
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jmp GP.LibCall
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*--------------------------------------
* AppleTalk MLICALL (AUXLC to MAINLC)
* Used by user
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* In:
* Y,A = Params
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*--------------------------------------
jmp GP.AtkCall
*--------------------------------------
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* ROMCALL (AUXLC to ROMLC)
* Used by Kernel
* In:
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* X = ROM Function
* Y,A = Param
*--------------------------------------
jmp GP.RomCall
*--------------------------------------
* BADCALL
*--------------------------------------
lda #MLI.E.BADCALL
sec
rts
*--------------------------------------
* SLEEP
*--------------------------------------
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GP.Sleep php
sei
phy
ldy #S.PS.A
sta (pPs),y
txa
iny #S.PS.X
sta (pPs),y
pla
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iny #S.PS.Y
sta (pPs),y
pla
iny #S.PS.P
sta (pPs),y
pla get PC LO
plx get PC HI
inc Advance one byte because of return by RTI
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bne GP.Sleep2
inx
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GP.Sleep2 ldy #S.PS.PC
sta (pPs),y
txa
iny #S.PS.PC+1
sta (pPs),y
tsx
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inx
inx keep PC HI,LO from KERNEL jsr PSExec/PSResume
inx Stack Ptr is $1ff if empty
txa
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beq .3
tay Save !Byte count for later
.2 pla
>PUSHA
inx
bne .2
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
bne .4
inc $1ff because of RTI
.4 lda (pPs)
ora #S.PS.F.SLEEP
sta (pPs)
lda #0 cld,clc,cli
pha
rti exit to kernel with CC
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*--------------------------------------
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* *** MUST BE REINTRANT ***
*--------------------------------------
GP.SysCall dec IRQ.InKernel
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pha
phy
ldy #S.PS.A
sta (pPs),y
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txa
iny #S.PS.X
sta (pPs),y
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pla
iny #S.PS.Y
sta (pPs),y
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tay
pla
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jsr K.SYSCALL2
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bcc .2 no error quit...
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tax CS,A=0 ?
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beq .3 Yes, BLOCKING I/O
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.2 inc IRQ.InKernel
rts Unmodified Carry
.3 pla get PC LO
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plx get PC HI
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* sec
sbc #2 move back JSR GP.SysCall -3 (jsr $BF00) +1 (RTI)
bcs .4
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dex
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.4 inc IRQ.InKernel
bra GP.Sleep2
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*--------------------------------------
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GP.LibCall dec IRQ.InLib
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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)
>STYA .1+1
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pla
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.1 jsr $FFFF SELF MODIFIED
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GP.LibCall.8 inc IRQ.InLib
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GP.LibCall.RTS rts
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*--------------------------------------
GP.AtkCall dec IRQ.InKernel
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>STYA .1
jsr GO.ProDOS
jsr MLI
.DA #MLIATALK
.1 .DA *
jsr GO.A2osX
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inc IRQ.InKernel
rts
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*--------------------------------------
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GP.RomCallPushFAC
jsr GP.ROMCALL
lda pStack
sec
sbc #5
sta pStack
sta FORPNT Ptr to dst buffer
lda pStack+1
sta FORPNT+1
ldx #ROM.GETFAC
*--------------------------------------
GP.RomCall dec IRQ.InKernel
phx
ldx $D000
stx .8+1
bit RROMBNK1
plx
jsr .1
.8 ldx #$ff
bit $C000,x
bit $C000,x
inc IRQ.InKernel
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clc
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
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.DA $E9E7 LOAD.ARG.FROM.INDEX
.DA $EA6B FDIVT+2
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.DA $EAFD LOAD.FAC.FROM.INDEX
.DA $EB27 SETFOR (GETFAC)
.DA $EBB2 FCOMP
.DA $EBF2 QINT (F->L)
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.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.ProDOS pha
lda $D000 We re coming from AUXLC, saving bank...
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sta GO.A2osX.BNK+1
pla
php
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clc
.HS 2C bit abs
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GO.A2osX php
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sec
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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
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ply
inx
bne .1
iny
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.1 stx GO.EXIT.JMP+1
sty GO.EXIT.JMP+2
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bcs GO.A2osX.BNK if CS, go AUXLC
bit RRAMWRAMBNK1 Go MAINLC (ProDOS), always BNK1
bit RRAMWRAMBNK1
tsx
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stx A2osX.SaveSX
ldx A2osX.SaveSM
txs
sta CLRALTZP
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bra GO.EXIT
GO.A2osX.BNK ldx #RRAMWRAMBNK1 Self Modified, initialized to BNK1 for INIT3
bit $C000,x
bit $C000,x
sta SETALTZP
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tsx
stx A2osX.SaveSM
ldx A2osX.SaveSX
txs
*--------------------------------------
GO.EXIT pha push P on stack
GO.EXIT.SaveY ldy #$ff
GO.EXIT.SaveX ldx #$ff
GO.EXIT.SaveA lda #$ff
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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)
* 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
bit IRQ.SkipA2osX After A2osX IRQ.H ?
bmi GP.IrqH.Exit
sta SETALTZP switch to aux LC
tsx
stx A2osX.SaveSM
ldx A2osX.SaveSX
txs
GP.IrqH.JSR jsr K.IrqH.DEV SELF MODIFIED
tsx go back to Main
stx A2osX.SaveSX
ldx A2osX.SaveSM
txs
sta CLRALTZP
rts
GP.IrqH.Exit stz IRQ.SkipA2osX reset flag
sec
rts
*--------------------------------------
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CORE.VBLState .BS 1
CORE.IRQMode .BS 1
CORE.TickPerSec .BS 1
CORE.TickPer10t .BS 1
CORE.TickSec .BS 1
CORE.Tick10t .BS 1
CORE.CPUStatCnt .DA #100
CORE.LastPSID .DA #0
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*--------------------------------------
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IRQ.Mode .BS 1
IRQ.SkipA2osX .BS 1
IRQ.Tick .BS 1
IRQ.InKernel .BS 1
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IRQ.InLib .BS 1
IRQ.IntNum .BS 1
IRQ.VBL.n0 .BS 1
IRQ.VBL.0n .BS 1
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IRQ.Vectors .BS K.IRQDEV.MAX*2
*--------------------------------------
*GO.Reset jsr GO.A2osX
* jmp CORE.Run
*--------------------------------------
*BrkHandler bra *
*--------------------------------------
GP.CodeEnd .BS $BEE0-*
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*--------------------------------------
* $BEE0->$BEEF : Public Variables
*--------------------------------------
.BS 16
*--------------------------------------
* $BEF0->$BEFF : Kernel Config Block
*--------------------------------------
.DA #6 A2osX.HZ=60hz
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.DA #2 A2osX.TTYDEVS=2
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.HS 000000000000
.DA #0 ChRoot/Preemptive Disabled
.HS 00000000000000 All Slots marked as "Free"
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*--------------------------------------
GP.End .EQ *
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MAN
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SAVE USR/SRC/SYS/KERNEL.S.GP
LOAD USR/SRC/SYS/KERNEL.S
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ASM