2015-03-14 21:48:35 +00:00
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PR#3
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PREFIX /DATA/A2OSX
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NEW
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INC 1
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AUTO 6
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.LIST OFF
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.OP 65C02
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*--------------------------------------
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* !!!!!!!! DO NOT USE VCPU16 !!!!!!!!
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* !!!!!! DO NOT USE ZPQuickPTRs !!!!!
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*--------------------------------------
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ZPMemMgrReqS .EQ ZPMemMgr store requested Size
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ZPMemMgrReqF .EQ ZPMemMgr+2 store requested Flags
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ZPMemMgrSPtr .EQ ZPMemMgr+6 Pointer To Slot selected
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ZPMemMgrTmp1 .EQ ZPMemMgr+8
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ZPMemMgrTmp2 .EQ ZPMemMgr+10
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ZPMemMgrTmp3 .EQ ZPMemMgr+12
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*--------------------------------------
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* TODO :
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* - Create a 256 bytes table in SLOT #0
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* (eh, mem.ID=0 always used! useful to test if hMem=0)
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* mapping hMem's to real memory blocks to help
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* Garbage collector move blocks
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*--------------------------------------
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S.MemMgrInit stz MEMMGR.MHLIMIT
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stz MEMMGR.HIMEM
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ldx /MLI
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dex Reserve $BE00 For Global Page
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stx MEMMGR.MHLIMIT+1
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stx MEMMGR.HIMEM+1
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>LDYAI A2osX.LOMEM
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>STYA MEMMGR.MLLIMIT
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>STYA MEMMGR.LOMEM
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stz MEMMGR.TABLESIZE Init Table Size to 0
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* jsr S.UpdateMemStats Not needed, will be called by S.GetMem
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>PUSHWI 256 get a 256 bytes buffer for Map Table, hMem=0
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>PUSHBI 0
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jsr S.GetMem create it...
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clc
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rts
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*--------------------------------------
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* PUBLIC
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*--------------------------------------
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S.SetLowMemLimit
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clc
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rts
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*--------------------------------------
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S.GarbageCollector
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clc
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rts
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*--------------------------------------
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* S.GetMem
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* In:
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* PULLB = FLAGS
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* PULLW = Size Requested
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* Out:
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* YA = PTR to Mem
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* X = S.MEM.ID
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* CS on err
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*--------------------------------------
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S.GetMem >PULLB ZPMemMgrReqF store requested flags
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>PULLW ZPMemMgrReqS store requested size
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lda ZPMemMgrReqS align REQS to 16 bytes
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and #$0F
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beq .10
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lda ZPMemMgrReqS
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and #$F0
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clc
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adc #$10
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sta ZPMemMgrReqS
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bcc .10
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inc ZPMemMgrReqS+1
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.10 ldx #0 init to SLOT #0 of MEMSLOT list
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lda MEMMGR.TABLESIZE Check if some free slot to reuse first
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beq .6
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.1 txa
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jsr S.GetMemByIDA
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lda (ZPMemMgrSPtr) Get Flags
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bmi .4 in use ?
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.2 lda ZPMemMgrReqF Found an empty slot
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and #S.MEM.F.ALIGN is request needs a page align ?
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beq .3
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ldy #S.MEM.PTR
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lda (ZPMemMgrSPtr),y get LO of PTR
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bne .4 not page-aligned
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.3 ldy #S.MEM.LEN
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lda (ZPMemMgrSPtr),y get LEN of this block
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cmp ZPMemMgrReqS compare with requested size
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bne .4
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iny
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lda (ZPMemMgrSPtr),y
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cmp ZPMemMgrReqS+1
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beq .5 requested size matches slot size !!!
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.4 inx move to next slot
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cpx MEMMGR.TABLESIZE last slot ?
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bne .1 check for another slot
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beq .6 last one, create a new slot
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*-------------- Reuse this SLOT
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.5 lda ZPMemMgrReqF get requested flags
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ora #S.MEM.F.INUSE mark as in use
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sta (ZPMemMgrSPtr)
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lda #0
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ldy #S.MEM.BIN
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sta (ZPMemMgrSPtr),y
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inc Mark this slot used by one task
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ldy #S.MEM.REFCNT
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sta (ZPMemMgrSPtr),y
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ldy #S.PS.ID
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lda (TSKMGR.TSKPTR),y
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ldy #S.MEM.OWNERPID
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sta (ZPMemMgrSPtr),y
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ldy #S.MEM.PTR
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lda (ZPMemMgrSPtr),y
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pha
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iny
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lda (ZPMemMgrSPtr),y A = HI PTR
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ply Y = LO PTR
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clc X = Current hMem
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rts
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*-------------- Create a New SLOT
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.6 lda ZPMemMgrReqF
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and #S.MEM.F.ALIGN is request needs a page align ?
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beq .7
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lda MEMMGR.MHLIMIT target PTR will be page aligned ?
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sec
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sbc ZPMemMgrReqS
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beq .7 yes, allocate
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tay no, reserve a free slot to fill gap
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lda #0
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jsr S.AddSlot
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bcs .99
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.7 >LDYA ZPMemMgrReqS
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jsr S.AddSlot
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bcs .99
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phx Save hMem
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>STYA ZPMemMgrTmp1
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lda ZPMemMgrReqF
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ora #S.MEM.F.INUSE
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sta (ZPMemMgrSPtr) set Flags
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lda #1
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ldy #S.MEM.REFCNT Mark this slot referenced
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sta (ZPMemMgrSPtr),y
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ldy #S.PS.ID
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lda (TSKMGR.TSKPTR),y
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ldy #S.MEM.OWNERPID
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sta (ZPMemMgrSPtr),y
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jsr S.UpdateMemStats
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>LDYA ZPMemMgrTmp1 Y,A = PTR
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plx X = hMem
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clc
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rts
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.99 sec
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rts
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*--------------------------------------
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* S.FreeMemA
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* In:
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* A = hMem To Free
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* Out:
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* X,Y unmodified
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*--------------------------------------
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S.FreeMemA and #$FF
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bne S.FreeMemA0 Slot=0, reserved by Kernel
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rts
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S.FreeMemA0 phy
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phx
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jsr S.GetMemByIDA
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lda (ZPMemMgrSPtr)
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bmi .10 In use ?
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bra *
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.10 ldy #S.MEM.REFCNT
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lda (ZPMemMgrSPtr),y Get count of those referencing this hMem
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dec only one left ?
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sta (ZPMemMgrSPtr),y
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bne .82 no, must be a code segment loaded several times
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ldy #S.MEM.BIN
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lda (ZPMemMgrSPtr),y Any BINPATH to discard ?
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beq .11
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pha save hMem
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>PUSHW ZPMemMgrSPtr
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pla
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jsr S.GetMemByIDA
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lda (ZPMemMgrSPtr)
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bmi .12 In use ?
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bra *
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.12 lda (ZPMemMgrSPtr) mark record as free
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and #$7F
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sta (ZPMemMgrSPtr)
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>PULLW ZPMemMgrSPtr
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.11 lda (ZPMemMgrSPtr) mark record as free
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and #$7F
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sta (ZPMemMgrSPtr)
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.20 lda MEMMGR.TABLESIZE
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beq .82
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.21 dec
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jsr S.GetMemByIDA
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lda (ZPMemMgrSPtr)
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bmi .81
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dec MEMMGR.TABLESIZE discard last record
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ldy #S.MEM.LEN
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lda (ZPMemMgrSPtr),y give back LEN bytes
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clc
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adc MEMMGR.MHLIMIT to HLIMIT
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sta MEMMGR.MHLIMIT
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iny
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lda (ZPMemMgrSPtr),y
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adc MEMMGR.MHLIMIT+1
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sta MEMMGR.MHLIMIT+1
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lda MEMMGR.MLLIMIT And give back S.MEM.SIZE
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sec
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sbc #S.MEM.SIZE
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sta MEMMGR.MLLIMIT to LLIMIT
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bcs .2
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dec MEMMGR.MLLIMIT+1
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.2 lda MEMMGR.TABLESIZE
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bne .21 no slot left, exit
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.81 jsr S.UpdateMemStats
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.82 plx
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ply
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clc
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rts
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*--------------------------------------
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* IN/OUT
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* A = hMem
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*--------------------------------------
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S.ClrMemA pha
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jsr S.GetMemByIDA
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ldy #S.MEM.LEN ZPMemMgrSPtr already set by S.GetMemByIDA
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lda (ZPMemMgrSPtr),y
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sta ZPMemMgrReqS set ZPMemMgrReqS to mem size
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iny
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lda (ZPMemMgrSPtr),y
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sta ZPMemMgrReqS+1
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ldy #S.MEM.PTR
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lda (ZPMemMgrSPtr),y
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tax
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iny
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lda (ZPMemMgrSPtr),y
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stx ZPMemMgrSPtr
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sta ZPMemMgrSPtr+1 set ZPMemMgrSPtr to Mem
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lda #0
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.1 ldx ZPMemMgrReqS
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bne .2
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ldx ZPMemMgrReqS+1
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beq .3
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dec ZPMemMgrReqS+1
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.2 dec ZPMemMgrReqS
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sta (ZPMemMgrSPtr)
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inc ZPMemMgrSPtr
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bne .1
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inc ZPMemMgrSPtr+1
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bra .1
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.3 pla
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rts
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*--------------------------------------
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* S.GetMemByIDA
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* In:
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* A = hMem
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* Out:
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* Y,A = ZPMemMgrSPtr = PTR to S.MEM
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* X unmodified
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*--------------------------------------
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S.GetMemByIDA stz ZPMemMgrSPtr+1
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asl
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rol ZPMemMgrSPtr+1
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asl
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rol ZPMemMgrSPtr+1
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asl
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rol ZPMemMgrSPtr+1
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clc
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adc MEMMGR.LOMEM
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sta ZPMemMgrSPtr
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tay
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lda ZPMemMgrSPtr+1
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adc MEMMGR.LOMEM+1
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sta ZPMemMgrSPtr+1
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rts
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*--------------------------------------
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* In:
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* A = hMem to BINPATH (PSTR)
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* Out:
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* Y,A = ZPMemMgrSPtr = PTR to S.MEM
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* X = hMem
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*--------------------------------------
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S.GetMemByNameA jsr S.GetMemPtrA
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>STYA ZPMemMgrTmp1 save BINPATH
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>LDYA MEMMGR.LOMEM
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>STYA ZPMemMgrTmp2
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ldx #0
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.1 lda (ZPMemMgrTmp2)
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bpl .6 In Use?
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ldy #S.MEM.BIN any BIN PATH in this slot?
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lda (ZPMemMgrTmp2),y
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beq .6
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jsr S.GetMemPtrA get pathname
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>STYA ZPMemMgrTmp3
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ldy #0
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.2 lda (ZPMemMgrTmp1),y
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cmp (ZPMemMgrTmp3),y
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bne .6
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tya
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iny
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cmp (ZPMemMgrTmp1)
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bne .2
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>LDYA ZPMemMgrTmp2
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clc
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rts
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.6 lda ZPMemMgrTmp2
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clc
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adc #S.MEM.SIZE
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sta ZPMemMgrTmp2
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bcc .7
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inc ZPMemMgrTmp2+1
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.7 inx
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cpx MEMMGR.TABLESIZE
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bne .1
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sec
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rts
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*--------------------------------------
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* S.GetMemPtrA
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* In:
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* A = hMem
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* Out:
|
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|
|
* Y,A = PTR to MemBlock
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|
|
|
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* X unmodified
|
|
|
|
|
*--------------------------------------
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|
|
S.GetMemPtrA jsr S.GetMemByIDA
|
|
|
|
|
ldy #S.MEM.PTR
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|
|
|
|
lda (ZPMemMgrSPtr),y
|
|
|
|
|
pha
|
|
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|
|
iny
|
|
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|
|
lda (ZPMemMgrSPtr),y
|
|
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|
ply
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|
|
rts
|
|
|
|
|
*--------------------------------------
|
|
|
|
|
* S.GetMemLenA
|
|
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|
|
* In:
|
|
|
|
|
* A = hMem
|
|
|
|
|
* Out:
|
|
|
|
|
* Y,A = PTR to MemLength
|
|
|
|
|
* X unmodified
|
|
|
|
|
*--------------------------------------
|
|
|
|
|
S.GetMemLenA jsr S.GetMemByIDA
|
|
|
|
|
ldy #S.MEM.LEN
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|
|
|
|
lda (ZPMemMgrSPtr),y
|
|
|
|
|
pha
|
|
|
|
|
iny
|
|
|
|
|
lda (ZPMemMgrSPtr),y
|
|
|
|
|
ply
|
|
|
|
|
rts
|
|
|
|
|
*--------------------------------------
|
|
|
|
|
* PRIVATE
|
|
|
|
|
*--------------------------------------
|
|
|
|
|
* S.AddSlot
|
|
|
|
|
* In:
|
|
|
|
|
* Y,A = Requested size
|
|
|
|
|
* Out:
|
|
|
|
|
* Y,A = PTR to MemSlot
|
|
|
|
|
* X = SLOT.ID
|
|
|
|
|
*--------------------------------------
|
|
|
|
|
S.AddSlot >STYA ZPMemMgrTmp1 save req size
|
|
|
|
|
lda MEMMGR.TABLESIZE
|
|
|
|
|
inc
|
|
|
|
|
beq .99 > 255 ERR:OUT OF SLOT
|
|
|
|
|
dec
|
|
|
|
|
jsr S.GetMemByIDA yes, get PTR to slot
|
|
|
|
|
|
|
|
|
|
lda MEMMGR.MHLIMIT Compute base PTR=HLIMIT-REQ size
|
|
|
|
|
sec
|
|
|
|
|
sbc ZPMemMgrTmp1
|
|
|
|
|
sta ZPMemMgrTmp2 store new HLIMIT in ZPMemMgrTmp2
|
|
|
|
|
lda MEMMGR.MHLIMIT+1
|
|
|
|
|
sbc ZPMemMgrTmp1+1
|
|
|
|
|
sta ZPMemMgrTmp2+1
|
|
|
|
|
|
|
|
|
|
lda MEMMGR.MLLIMIT compute new LLIMIT
|
|
|
|
|
clc
|
|
|
|
|
adc #S.MEM.SIZE
|
|
|
|
|
sta ZPMemMgrTmp3 store new LLIMIT in ZPMemMgrTmp3
|
|
|
|
|
lda MEMMGR.MLLIMIT+1
|
|
|
|
|
adc #0
|
|
|
|
|
sta ZPMemMgrTmp3+1
|
|
|
|
|
|
|
|
|
|
lda ZPMemMgrTmp2 ensure new LLIMIT is not higher
|
|
|
|
|
sec than new HLIMIT
|
|
|
|
|
sbc ZPMemMgrTmp3
|
|
|
|
|
lda ZPMemMgrTmp2+1
|
|
|
|
|
sbc ZPMemMgrTmp3+1
|
|
|
|
|
bcc .98 ERR out of mem
|
|
|
|
|
|
|
|
|
|
>LDYA ZPMemMgrTmp3 get new LLIMIT
|
|
|
|
|
>STYA MEMMGR.MLLIMIT And set it allocated
|
|
|
|
|
|
|
|
|
|
lda #0
|
|
|
|
|
sta (ZPMemMgrSPtr)
|
|
|
|
|
ldy #S.MEM.BIN
|
|
|
|
|
sta (ZPMemMgrSPtr),y
|
|
|
|
|
ldy #S.MEM.REFCNT
|
|
|
|
|
sta (ZPMemMgrSPtr),y
|
|
|
|
|
ldy #S.MEM.OWNERPID
|
|
|
|
|
sta (ZPMemMgrSPtr),y
|
|
|
|
|
|
|
|
|
|
ldy #S.MEM.PTR
|
|
|
|
|
lda ZPMemMgrTmp2 get new HLIMIT
|
|
|
|
|
sta MEMMGR.MHLIMIT set as system HLIMIT value
|
|
|
|
|
sta (ZPMemMgrSPtr),y store is as base address of new slot
|
|
|
|
|
iny
|
|
|
|
|
lda ZPMemMgrTmp2+1
|
|
|
|
|
sta MEMMGR.MHLIMIT+1
|
|
|
|
|
sta (ZPMemMgrSPtr),y
|
|
|
|
|
|
|
|
|
|
ldy #S.MEM.LEN
|
|
|
|
|
lda ZPMemMgrTmp1 get requested size
|
|
|
|
|
sta (ZPMemMgrSPtr),y setup slot LEN
|
|
|
|
|
iny
|
|
|
|
|
lda ZPMemMgrTmp1+1
|
|
|
|
|
sta (ZPMemMgrSPtr),y
|
|
|
|
|
|
|
|
|
|
>LDYA ZPMemMgrTmp2 Y,A = PTR
|
|
|
|
|
ldx MEMMGR.TABLESIZE X = SLOT.ID
|
|
|
|
|
inc MEMMGR.TABLESIZE mark this slot allocated
|
|
|
|
|
clc
|
|
|
|
|
rts
|
|
|
|
|
.98 lda #MEMMGR.ERROOM
|
|
|
|
|
sec
|
|
|
|
|
rts
|
|
|
|
|
.99 lda #MEMMGR.ERROOS
|
|
|
|
|
sec
|
|
|
|
|
rts
|
|
|
|
|
*--------------------------------------
|
|
|
|
|
S.UpdateMemStats
|
|
|
|
|
lda MEMMGR.MHLIMIT
|
|
|
|
|
sec
|
|
|
|
|
sbc MEMMGR.MLLIMIT
|
|
|
|
|
sta MEMMGR.MFREE
|
|
|
|
|
lda MEMMGR.MHLIMIT+1
|
|
|
|
|
sbc MEMMGR.MLLIMIT+1
|
|
|
|
|
sta MEMMGR.MFREE+1
|
|
|
|
|
rts
|
|
|
|
|
*--------------------------------------
|
|
|
|
|
MAN
|
|
|
|
|
SAVE SYS/KERNEL.S.MEM
|
|
|
|
|
LOAD SYS/KERNEL.S
|
|
|
|
|
ASM
|