NEW PREFIX AUTO 4,1 *-------------------------------------- .DUMMY .OR FAC 15 Bytes BIN.CmdLine .BS 2 BIN.hMem .BS 1 BIN.Move.Len .BS 2 BIN.R.CS.Start .BS 2 BIN.R.CS.End .BS 2 BIN.R.End .BS 2 BIN.R.Offset .BS 2 .ED *-------------------------------------- * LoadLib * in : * Y,A = PTR To "LibName.o" C-String * out : * A = hMem To loaded LIB *-------------------------------------- K.LoadLib jsr ENV.Search.LIB bcs .9 >LDYAI K.Buf256 jsr BIN.Load Y,A = "/PATH/BIN" bcs .9 >STYA .1+1 stx .8+1 txa Pass hLib to LibLoad ldx #LIBMGR.LOAD .1 jsr $ffff SELF MODIFIED, Call LIB.LOAD function ldx .8+1 bcs BIN.Load.Cleanup .8 lda #$ff SELF MODIFIED, hLib * clc .9 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 .1 ldx #LIBMGR.UNLOAD .2 jsr $ffff Self Modified, Call LIB.UNLOAD function pla jmp K.FreeMem .8 sta (ZPMemMgrSPtr),y pla * clc rts */-------------------------------------- * # LoadDrv * ## ASM * **In:** * Y,A = PTR to "NAME.DRV [PARAM]" C-String * ## RETURN VALUE * none *\-------------------------------------- K.LoadDrv >STYA .2+1 Save "BIN\0ARGS\0\0" jsr ENV.Search.DRV bcs .9 >LDYAI K.Buf256 jsr BIN.Load Y,A = "/PATH/BIN" bcs .9 >STYA .3+1 stx .8+1 ldx #$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 $ffff SELF MODIFIED, call Dev.Detect .8 ldx #$ff SELF MODIFIED, hMem jsr BIN.Load.Cleanup bcs .9 lda #0 Make sure RC = 0 if success clc .9 rts BIN.Load.Cleanup php pha txa jsr K.FreeMem pla plp BIN.Load.Cleanup.RTS rts *-------------------------------------- * BIN.Load * in : * Y,A = /BIN/PATH (CSTR) * out : * Y,A = MEMPTR * X = hMem of Code Segment *-------------------------------------- BIN.Load >STYA BIN.CmdLine 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 (BIN.CmdLine),y .3 cmp $ffff,y SELF MODIFIED bne .1 iny ora #0 bne .2 txa jsr MEM.GetMemByID ldy #S.MEM.REFCNT lda (ZPMemMgrSPtr),y inc sta (ZPMemMgrSPtr),y clc jmp MEM.GetMEMPTR * X=hMem, Y,A=Ptr *-------------------------------------- * STAT Already called by Filesearch in FindDRV, FindLIB * STAT Already called by PS.Load (TXT,BIN,SYS) *-------------------------------------- BIN.Load.1 >LDYA K.S.STAT+S.STAT.P.AUXTYPE >STYA BIN.R.CS.Start >PUSHYA Push AUXTYPE >PUSHBI S.FI.T.BIN >PUSHBI O.RDONLY >LDYA BIN.CmdLine >SYSCALL LoadFile BANK1!!! bcs BIN.Load.Cleanup.RTS Error Loading file stx BIN.hMem save hMem pha YA=CODE+DATA size tya * clc CC from bcs .99 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 -> Code start pha YA = actual load address tya sec sbc BIN.R.CS.Start sta BIN.R.Offset Offset=ZPPtr1-AUXTYPE pla sbc BIN.R.CS.Start+1 sta BIN.R.Offset+1 ldy #H.BIN.CS.SIZE get Code Len lda (ZPPtr1),y clc adc BIN.R.CS.Start sta BIN.R.CS.End ZPPtr1 + CodeLen iny lda (ZPPtr1),y adc BIN.R.CS.Start+1 sta BIN.R.CS.End+1 jsr BIN.RelExe >LDYA BIN.CmdLine get back bin path >SYSCALL StrDup make a copy of this string bcs .98 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 return hMEM to Caller... clc jmp MEM.GetMEMPTR ...and Y,A=PTR to CS .98 ldx BIN.hMem jmp BIN.Load.Cleanup Discard Loaded Code, exits CS */-------------------------------------- * # InsDrv * ## C * `void * insdrv (void * src, void * crvcsstart, void * drvcsend, void * drvend);` * ## ASM * **In:** * `>PUSHW DRV.END` * `>PUSHW DRV.CS.END` * `>PUSHW DRV.CS.START` * `>LDYA L.SRC` * `SYSCALL insdrv` * ## RETURN VALUE * Y,A = Ptr to installed driver *\-------------------------------------- K.InsDrv >STYA ZPPtr2 SRC PTR >PULLW BIN.R.CS.Start >PULLW BIN.R.CS.End >PULLW BIN.R.End lda BIN.R.End Compute DRVLen=End-start sec sbc BIN.R.CS.Start sta BIN.Move.Len tay lda BIN.R.End+1 sbc BIN.R.CS.Start+1 sta BIN.Move.Len+1 jsr MEM.GetKrnlBuf Y,A = LEN bcs .9 No More Room to load Driver >STYA ZPPtr1 Y,A = DST Buf for RelDrv... >STYA ZPPtr3 ...for move... sty .7+1 ...and for exit sta .8+1 lda ZPPtr1 sec sbc BIN.R.CS.Start sta BIN.R.Offset lda ZPPtr1+1 sbc BIN.R.CS.Start+1 sta BIN.R.Offset+1 lda BIN.Move.Len+1 eor #$ff pha lda BIN.Move.Len eor #$ff tax ldy #0 .1 inx bne .2 pla inc beq .3 pha .2 lda (ZPPtr2),y sta (ZPPtr3),y iny bne .1 inc ZPPtr2+1 inc ZPPtr3+1 bra .1 .3 jsr BIN.RelDrv Relocate at Ptr1 .7 ldy #$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.RelocateAtPtr1Y ldy #H.BIN.EXE.REL.TABLE skip Header, CS.SIZE & DS.SIZE... (16 bytes) .HS 2C bit abs *-------------------------------------- BIN.RelDrv ldy #H.BIN.DRV.REL.TABLE .1 iny lda (ZPPtr1),y HI in A beq .2 $00xx = end of table dey jsr BIN.RelocateAtPtr1Y iny bra .1 *-------------------------------------- .2 jsr MEM.AddYp1ToPtr1 add current offset in Y to Ptr * + 1 to skip last 00 from beq .2 * ZPPtr1=Current Code PTR .3 lda BIN.R.CS.End compute new CS.END to stop relocating clc adc BIN.R.Offset sta .7+1 lda BIN.R.CS.End+1 adc BIN.R.Offset+1 sta .8+1 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 #$8 abs addressing? beq .6 no.... and #7 save Opcode length... pha ldy #1 jsr BIN.RelocateAtPtr1Y .5 pla get back Opcode length... .6 clc A = OPCODE length adc ZPPtr1 sta ZPPtr1 bcc .7 inc ZPPtr1+1 clc Make sure exit with CC .7 eor #$ff SELF MODIFIED A = ZPPtr1 bne .3 lda ZPPtr1+1 .8 eor #$ff SELF MODIFIED bne .3 next opcode.... rts *-------------------------------------- BIN.RelocateAtPtr1Y 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