NEW AUTO 3,1 *-------------------------------------- * LoadLib * in : * Y,A = PTR To "LibName" C-String * out : * A = hMem To loaded LIB *-------------------------------------- K.LoadLib jsr PS.Find.LIB bcs .99 jsr BIN.Load K.Buf256 = "/PATH/BIN" bcs .99 >STYA .1+1 txa Pass hLib to LibLoad pha ldx #LIBMGR.LOAD .1 jsr $ffff SELF MODIFIED, Call LIB.LOAD function plx bcc .8 pha txa jsr K.FreeMem pla sec rts .8 txa * clc .99 rts *-------------------------------------- * UnloadLib * in : * A = hMem To Lib * out : *-------------------------------------- K.UnloadLib pha jsr K.GetMemPtr >STYA .2+1 ldy #S.MEM.REFCNT lda (ZPMemMgrSPtr),y dec bne .8 ldx #LIBMGR.UNLOAD .2 jsr $ffff Self Modified, Call LIB.UNLOAD function pla jmp K.FreeMem .8 sta (ZPMemMgrSPtr),y pla * clc rts */-------------------------------------- * # LoadDrv * ## ASM * **In:** * Y,A = PTR to "NAME.DRV [PARAM]" C-String * ## RETURN VALUE * none *\-------------------------------------- K.LoadDrv >STYA .2+1 Save "BIN\0ARGS\0\0" jsr PS.Find.DRV bcs .9 jsr BIN.Load K.Buf256 = "/PATH/BIN" bcs .9 >STYA .3+1 ldx #$ff .1 inx Skip "BIN" .2 lda $ffff,x bne .1 txa sec adc .2+1 tay lda #0 adc .2+2 Y,A = ARGS .3 jsr $ffff SELF MODIFIED, call Dev.Detect jsr BIN.Load.Free bcs .9 lda #0 Make sure RC = 0 if success * clc .9 rts *-------------------------------------- * BIN.Load * in : * K.Buf256 = /BIN/PATH (CSTR) * out : * Y,A = MEMPTR * X = hMem of Code Segment *-------------------------------------- BIN.Load lda A2osX.FSID bne .11 ldx #$ff .10 inx lda K.Buf256,x beq .11 cmp #'a' bcc .10 cmp #'z'+1 bcs .10 eor #$20 sta K.Buf256,x bra .10 .11 ldx #0 .1 cpx Mem.LastSlot beq BIN.Load.1 inx we will skip Slot 0... txa jsr MEM.GetMemByID lda (ZPMemMgrSPtr) bpl .1 In Use? ldy #S.MEM.BIN any BIN PATH in this slot? lda (ZPMemMgrSPtr),y beq .1 jsr K.GetMemPtr X unmodified, get pathname >STYA .3+1 ldy #0 .2 lda K.Buf256,y .3 cmp $ffff,y SELF MODIFIED bne .1 iny ora #0 bne .2 stx BIN.hMem save hMem txa jsr MEM.GetMemByID jsr Mem.IncRefCnt clc jmp MEM.GetMEMPTR Y,A=Ptr *-------------------------------------- * STAT Already called by Filesearch in FindDRV, FindLIB * STAT Already called by PS.Load (TXT,BIN,SYS) *-------------------------------------- BIN.Load.1 >PUSHWI K.Buf256 >PUSHBI O.RDONLY >PUSHBI S.FI.T.BIN >LDYA K.S.STAT+S.STAT.P.AUXTYPE >STYA BIN.R.CS.Start >PUSHYA Push AUXTYPE jsr K.LoadFile bcs .9 Error Loading file stx BIN.hMem save hMem pha YA=CODE+DATA size tya * clc adc BIN.R.CS.Start Get AUXTYPE for actual Base Address sta BIN.R.End compute Range End=AUXTYPE+FILELEN pla adc BIN.R.CS.Start+1 sta BIN.R.End+1 txa jsr K.GetMemPtr >STYA ZPPtr1 set ZPPtr1 -> New Code start jsr BIN.CompOfsYA YA = actual load address jsr Mem.SetOwnerPS0 this CS is owned by PS 0 ldy #H.BIN.CS.SIZE get Code Len lda (ZPPtr1),y pha iny lda (ZPPtr1),y ply jsr BIN.CompCSEndYA jsr BIN.RelExe >LDYAI K.Buf256 get back bin path jsr K.strdup make a copy of this string bcs BIN.Load.Free jsr Mem.SetOwnerPS0 Make BINPATH owned by PS0 lda BIN.hMem Keep X=new string hMem jsr MEM.GetMemByID X unmodified lda (ZPMemMgrSPtr) ora #S.MEM.F.CODE This is a code segment sta (ZPMemMgrSPtr) txa Get Back Cmd line hMem ldy #S.MEM.BIN sta (ZPMemMgrSPtr),y ldx BIN.hMem setup X = CS hMem clc jmp MEM.GetMEMPTR ...and Y,A=PTR to CS .9 rts BIN.Load.Free php pha lda BIN.hMem jsr K.FreeMem pla plp rts Discard Loaded Code, exits CS */-------------------------------------- * # InsDrv * ## C * `void * insdrv (void * src, void * crvcsstart, void * drvcssize, void * drvend);` * ## ASM * **In:** * `>PUSHW DRV.END` * `>PUSHW DRV.CS.SIZE` * `>PUSHW DRV.CS.START` * `>LDYA L.SRC` * `>SYSCALL insdrv` * ## RETURN VALUE * Y,A = Ptr to installed driver *\-------------------------------------- K.InsDrv >STYA ZPPtr3 SRC PTR for move >PULLW BIN.R.CS.Start >PULLYA DRV.CS.SIZE jsr BIN.CompCSEndYA >PULLA BIN.R.End sta BIN.R.End sec sbc BIN.R.CS.Start tay >PULLA sta BIN.R.End+1 sbc BIN.R.CS.Start+1 >STYA BIN.R.Size jsr MEM.GetKrnlBuf Y,A = CODE + DATA bcs .9 No More Room to load Driver >STYA ZPPtr1 Y,A = DST Buf for RelDrv... >STYA ZPPtr4 ...for move... sty .7+1 ...and for exit sta .8+1 jsr BIN.CompOfsYA lda BIN.R.Size eor #$ff tax lda BIN.R.Size+1 eor #$ff pha ldy #0 .1 inx bne .2 pla inc beq .3 pha .2 lda (ZPPtr3),y sta (ZPPtr4),y iny bne .1 inc ZPPtr3+1 inc ZPPtr4+1 bra .1 .3 jsr BIN.RelDrv Relocate at Ptr1 .7 ldy #$ff SELF MODIFIED .8 lda #$ff SELF MODIFIED .9 rts *-------------------------------------- BIN.RelExe ldy #H.BIN.T+1 lda (ZPPtr1),y cmp /H.BIN.T.BIN65 beq .1 cmp /H.BIN.T.DRV65 beq .1 lda #E.IBIN sec rts .1 ldy #H.BIN.JMP relocate Main JMP jsr BIN.RelAtPtr1Y ldy #16 skip Header, CS.SIZE & DS.SIZE... (16 bytes) .HS 2C bit abs *-------------------------------------- BIN.RelDrv ldy #2 start after CLD JMP .1 iny lda (ZPPtr1),y HI in A beq .2 $00xx = end of table dey jsr BIN.RelAtPtr1Y iny bne .1 inc ZPPtr1+1 bra .1 *-------------------------------------- .2 jsr SHARED.AddYp12P1 add current offset in Y to Ptr * + 1 to skip last 00 from beq .2 * ZPPtr1=Current Code PTR lda BIN.R.CS.End clc adc BIN.R.Offset sta BIN.R.Stop lda BIN.R.CS.End+1 adc BIN.R.Offset+1 sta BIN.R.Stop+1 .3 lda (ZPPtr1) get OPCODE lsr /2 tax lda BIN.65816,x get OPCODE definition bcs .4 go get LO nibble lsr lsr move HI -> LO lsr lsr .4 and #$0f bit #$8 abs addressing? beq .5 no.... and #7 save Opcode length... pha ldy #1 jsr BIN.RelAtPtr1Y pla get back Opcode length... .5 tay A = OPCODE length jsr SHARED.AddY2P1 .6 cmp BIN.R.Stop A = ZPPtr1 bne .3 lda ZPPtr1+1 .7 cmp BIN.R.Stop+1 bne .3 next opcode.... clc Make sure exit with CC rts *-------------------------------------- YA = CS Size BIN.CompCSEndYA pha tya clc adc BIN.R.CS.Start sta BIN.R.CS.End ZPPtr1 + CodeLen pla adc BIN.R.CS.Start+1 sta BIN.R.CS.End+1 rts *-------------------------------------- YA = Target Address BIN.CompOfsYA pha tya sec sbc BIN.R.CS.Start sta BIN.R.Offset pla sbc BIN.R.CS.Start+1 sta BIN.R.Offset+1 rts *-------------------------------------- BIN.RelAtPtr1Y lda (ZPPtr1),y Get LO tax save LO in X iny make Y point to HI lda (ZPPtr1),y Get HI cpx BIN.R.CS.Start sbc BIN.R.CS.Start+1 bcc .9 addr < BIN.R.CS.Start, out of range txa Get back LO cpx BIN.R.End lda (ZPPtr1),y Get HI sbc BIN.R.End+1 bcs .9 addr > BIN.R.End, out of range txa Get back LO dey clc adc BIN.R.Offset sta (ZPPtr1),y iny lda (ZPPtr1),y adc BIN.R.Offset+1 sta (ZPPtr1),y .9 rts *-------------------------------------- * 6502/65C02/65816 OPCODES * Bit 3 : 1 = absolute addressing * Bit 2-1-0 : opcode + @ length *-------------------------------------- * 0.1.2.3.4.5.6.7.8.9.A.B.C.D.E.F BIN.65816 * TO DO : Make 2 different tables * http://axis.llx.com/~nparker/a2/opcodes.html *-------------------------------------- * 65R02 OPCODES *-------------------------------------- * 0.1.2.3.4.5.6.7.8.9.A.B.C.D.E.F BIN.65R02 .HS 1.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3 .HS 2.2.2.1.2.2.2.2.1.B.1.1.B.B.B.3 .HS B.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3 .HS 2.2.2.1.2.2.2.2.1.B.1.1.B.B.B.3 .HS 1.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3 .HS 2.2.2.1.2.2.2.2.1.B.1.1.1.B.B.3 .HS 1.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3 .HS 2.2.2.1.2.2.2.2.1.B.1.1.B.B.B.3 .HS 2.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3 .HS 2.2.2.1.2.2.2.2.1.B.1.1.B.B.B.3 .HS 2.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3 .HS 2.2.2.1.2.2.2.2.1.B.1.1.B.B.B.3 .HS 2.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3 .HS 2.2.2.1.2.2.2.2.1.B.1.1.1.B.B.3 .HS 2.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3 .HS 2.2.2.1.2.2.2.2.1.B.1.1.1.B.B.3 *-------------------------------------- MAN SAVE usr/src/sys/kernel.s.bin LOAD usr/src/sys/kernel.s ASM