A2osX/SYS/KERNEL.S.GP.txt
2019-02-27 16:44:11 +00:00

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NEW
PREFIX
AUTO 4,1
*--------------------------------------
* SYSCALL (AUXLC to AUXLC)
* Used by user & kernel for inter bank Calls
* In:
* X = SYSfnc.Index
* Y,A = free for Inline param
*--------------------------------------
GP.CodeStart 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
*--------------------------------------
* ROMCALL (AUXLC to ROMLC)
* Used by Kernel
* In:
* X = ROM Function
* Y,A = Param
*--------------------------------------
jmp GP.RomCall
*--------------------------------------
* BADCALL
*--------------------------------------
lda #MLI.E.BADCALL
sec
rts
*--------------------------------------
* SLEEP
*--------------------------------------
GP.Sleep php
sei
phy
ldy #S.PS.A
sta (pPs),y
txa
iny #S.PS.X
sta (pPs),y
pla
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
bne .1
inx
.1 iny #S.PS.PC
sta (pPs),y
txa
iny #S.PS.PC+1
sta (pPs),y
tsx
inx
inx keep PC HI,LO from KERNEL jsr PSExec/PSResume
inx Stack Ptr is $1ff if empty
txa
beq .3
tay Save !Byte count for later
.2 pla
>PUSHA
inx
bne .2
tya
.3 >PUSHA push CPU Stack BC to restore on top of Soft Stack
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
*--------------------------------------
* *** MUST BE REINTRANT ***
*--------------------------------------
GP.SysCall dec IRQ.InKernel
sty .5+1 save Y (Func Arg)
sta .6+1 save A (Func Arg)
stx .7+1 save X (Func ID)
lda K.SYSCALL.BANK,x Get Target BNK
bpl .1 0, E000, no BNK change
cmp $D000 #RRAMWRAMBNK1 or #RRAMWRAMBNK2
beq .1 same as actual BNK...go restore A and JMP
tax set Target BNK in x
lda $D000 get source BNK
bit $C000,x switch to Target BNK
bit $C000,x
.1 pha remember source BNK
jsr .5 go to kernel.....
stx .4+1 save X
plx get back Source BNK
bit $C000,x switch to Target BNK
bit $C000,x
bcc .4 no error quit...
tax CS,A=0 ?
bne .4 no, return error to caller
pla get PC LO
plx get PC HI
sec
sbc #3 move back JSR GP.SysCall
bcs .2
dex
.2 phx
pha
ldy .5+1
lda .6+1
ldx .7+1
inc IRQ.InKernel
jmp GP.Sleep
.4 ldx #$FF Self Modified
inc IRQ.InKernel
rts Unmodified Carry
.5 ldy #$FF Self Modified
.6 lda #$FF Self Modified
.7 ldx #$FF Self Modified
jmp (K.SYSCALL.JMP,x)
*--------------------------------------
GP.LibCall dec IRQ.InKernel
pha No need to save X, K.GetMemPtr will leave it unmodified
tya Get LIB hMem in A
jsr K.GetMemPtr Get LIB Code Segment (MemMgr in $E000, no BNK change)
>STYA .1+1
pla
.1 jsr $FFFF SELF MODIFIED
GP.LibCall.8 inc IRQ.InKernel
rts
*--------------------------------------
GP.AtkCall dec IRQ.InKernel
>STYA .1
jsr GO.ProDOS
jsr MLI
.DA #MLIATALK
.1 .DA *
jsr GO.A2osX
bra GP.LibCall.8
*--------------------------------------
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
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
.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.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 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
*--------------------------------------
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
*--------------------------------------
IRQ.Mode .BS 1
IRQ.SkipA2osX .BS 1
IRQ.Tick .BS 1
IRQ.InKernel .BS 1
IRQ.IntNum .BS 1
IRQ.VBL.n0 .BS 1
IRQ.VBL.0n .BS 1
IRQ.Vectors .BS K.IRQDEV.MAX*2
*--------------------------------------
*GO.Reset jsr GO.A2osX
* jmp CORE.Run
*--------------------------------------
*BrkHandler bra *
*--------------------------------------
GP.CodeEnd .BS $BEE0-*
*--------------------------------------
* $BEE0->$BEEF : Public Variables
*--------------------------------------
.BS 16
*--------------------------------------
* $BEF0->$BEFF : Kernel Config Block
*--------------------------------------
.DA #6 A2osX.HZ=60hz
.DA #2 A2osX.TTYDEVS=2
.HS 000000000000
.DA #0 ChRoot/Preemptive Disabled
.HS 00000000000000 All Slots marked as "Free"
*--------------------------------------
GP.End .EQ *
MAN
SAVE USR/SRC/SYS/KERNEL.S.GP
LOAD USR/SRC/SYS/KERNEL.S
ASM