mirror of
https://github.com/A2osX/A2osX.git
synced 2024-11-20 03:31:42 +00:00
546 lines
14 KiB
Plaintext
546 lines
14 KiB
Plaintext
NEW
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AUTO 3,1
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* MEMMGR memory manager
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*
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* allocate buffer in memory tables
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alcbuffr .EQ *-ofsX
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ldy #$04 index to user specified buffer.
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alcbufr1 .EQ *-ofsX
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lda (A3L),y this buffer must be on a page boundary.
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tax save for validation.
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cmp #$08
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bcc L4E1E cannot be lower than video !
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cmp #$BC nor greater than $BB00
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bcs L4E1E since it would wipe out globals...
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sta datptr+1
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dey
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lda (A3L),y low address should be zero !
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sta datptr
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bne L4E1E error if not page boundary.
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inx add 4 pages for 1k buffer.
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inx
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inx
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inx
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L4DED dex test for conflicts.
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jsr cmembit test for free buffer space
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and memmap,y P8 memory bitmap
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bne L4E1E report memory conflict, if any.
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cpx datptr+1 test all 4 pages.
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bne L4DED
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inx add 4 pages again for allocation.
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inx
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inx
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inx
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L4DFE dex set proper bits to 1
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jsr cmembit
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ora memmap,y to mark it's allocation.
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sta memmap,y
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cpx datptr+1 set all 4 pages
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bne L4DFE
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ldy fcbptr calculate buffer number
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lda fcbbuf,y
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asl buffer number = (entnum) * 2.
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sta fcbbuf+11,y save it in fcb.
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tax use entnum * 2 as index to global
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lda datptr+1 buffer addr tables. get addr already
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sta buftbl-1,x validated as good. store hi addr
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clc (entnums start at 1, not 0)
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rts
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L4E1E lda #$56 buffer is in use or not legal
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sec
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rts
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getbufadr .EQ *-ofsX
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tax index into global buffer table.
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lda buftbl-2,x
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sta bufaddrl
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lda buftbl-1,x
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sta bufaddrh
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rts
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relbuffr .EQ *-ofsX preserve buffer address in 'bufaddr'
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jsr getbufadr
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tay returns high buffer address in acc.
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beq L4E54 branch if unallocated buffer space.
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stz buftbl-1,x take address out of buffer list.
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stz buftbl-2,x (x was set up by getbufadr)
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freebuf .EQ *-ofsX
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ldx bufaddrh get hi buffer address
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inx add 4 pages to account for 1k space.
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inx
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inx
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inx
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L4E43 dex drop to next lower page.
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jsr cmembit get bit and position to memtable of
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eor #$FF this page. invert mask.
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and memmap,y mark address as free space.
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sta memmap,y
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cpx bufaddrh all pages freed ?
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bne L4E43 no.
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L4E54 clc no error.
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rts
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* calculate memory allocation bit position.
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* on entry: x = high address of buffer, low address assumed zero.
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* on exit: acc = allocation bit mask, x = unchanged, y = pointer to memtabl byte
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cmembit .EQ *-ofsX
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txa page address
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and #$07 which page in any 2k set ?
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tay use as index to determine
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lda whichbit,y bit position representation.
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pha save bit position mask for now.
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txa page address.
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lsr
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lsr determine 2k set
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lsr
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tay return it in y.
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pla restore bit mask. return bit position
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rts in a & y, pointer to memtabl in x.
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valdbuf .EQ *-ofsX
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lda usrbuf+1 high address of user's buffer
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cmp #$02 must be greater than page 2.
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bcc L4E1E report bad buffer
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ldx cbytes+1
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lda cbytes get cbytes-1 value.
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sbc #$01 (carry is set)
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bcs L4E76
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dex
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L4E76 clc
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adc usrbuf calculate end of request address.
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txa do high address.
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adc usrbuf+1 the final address
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tax must be less than $BFnn (globals)
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cpx #$BF
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bcs L4E1E report bad buffer.
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inx loop thru all affected pages.
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vldbuf1 .EQ *-ofsX
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L4E82 dex check next lower page.
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jsr cmembit
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and memmap,y if 0 then no conflict.
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bne L4E1E branch if conflict.
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cpx usrbuf+1 was that the last (lowest) page ?
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bne L4E82 if not.
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clc all pages ok.
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rts
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getbuf .EQ *-ofsX give user address of file buffer
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ldy #$02 referenced by refnum.
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lda bufaddrl
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sta (A3L),y
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iny
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lda bufaddrh
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sta (A3L),y
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clc no errors possible
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rts
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setbuf .EQ *-ofsX
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ldy #$03
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jsr alcbufr1 allocate new buffer address over old one
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bcs L4EC7 report any errors immediately
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lda bufaddrh
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sta usrbuf+1
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lda bufaddrl
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sta usrbuf
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jsr freebuf free address space of old buffer
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ldy #$00
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ldx #$03
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L4EB8 lda (usrbuf),y move all 4 pages of the buffer to
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sta (datptr),y new location.
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iny
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bne L4EB8
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inc datptr+1
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inc usrbuf+1
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dex
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bpl L4EB8
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clc no errors
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L4EC7 rts
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* move 3 pages of dispatcher from 'displc2' to 'dispadr'
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* this move routine must be resident above $E000 at all times
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calldisp .EQ *-ofsX
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lda RRAMWRAMBNK2 read/write RAM bank 2
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lda RRAMWRAMBNK2
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lda /dispadr
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sta A2L+1
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lda #dispadr
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sta A2L
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lda /displc2
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sta A1L+1
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stz A1L
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ldy #$00
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ldx #$03 3 pages to move.
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L4EE0 dey move a page of code.
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lda (A1L),y
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sta (A2L),y
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tya
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bne L4EE0
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inc A1L+1 pointers to next page
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inc A2L+1
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dex move all pages needed
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bne L4EE0
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lda RRAMWRAMBNK1 read/write RAM bank 1
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lda RRAMWRAMBNK1 swap mli space back in
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stz mliact MLI active flag
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stz softev
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lda /dispadr point RESET to dispatch entry
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sta softev+1
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eor #$A5
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sta pwredup power up byte
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jmp dispadr
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* translate a prodos call into a smartport call
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* to access unseen smartport devices
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remap_sp .EQ *-ofsX
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ldx #$03 assume 3 parameters.
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lda A4L command number
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sta cmdnum
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bne L4F1B taken if not status call
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ldy #spstatlist set up memory for the status list buffer
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sty buf fake up the prodos parameters
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ldy /spstatlist
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sty buf+1
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stz bloknml set statcode = 0 for simple status call
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L4F1B cmp #$03 format command ?
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bne L4F21 no.
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ldx #$01 format has only 1 parameter.
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L4F21 stx statparms set # of parms.
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lda unitnum
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lsr turn unit number into an index
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lsr
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lsr
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lsr
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tax
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lda spunit-1,x get the smartport unit number and
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sta sp_unitnum store into smartport parm list.
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lda spvectlo-1,x
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sta sp_vector+1 copy smartport entry address
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lda spvecthi-1,x
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sta sp_vector+2
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ldx #$04 copy buffer pointer and block #
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L4F3F lda buf-1,x from prodos parameters
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sta sp_bufptr-1,x to smartport parameter block
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dex
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bne L4F3F
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sp_vector .EQ *-ofsX smartport call
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jsr $0000 (entry address gets modified)
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cmdnum .EQ *-ofsX
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.HS 00 command #
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.DA statparms
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bcs L4F6E
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ldx cmdnum status call ?
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bne L4F6E no...
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ldx spstatlist+1 else get the block count
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ldy spstatlist+2
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lda spstatlist get the returned status.
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bit #$10 is there a disk present ?
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bne L4F65 yes, check for write protected.
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lda #$2F return offline error.
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bra L4F6D
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L4F65 and #$44 mask all but write allowed and write
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eor #$40 protected bits. if allowed and not
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beq L4F6E protected, exit with carry clear
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lda #$2B else return write protected error.
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L4F6D sec
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L4F6E rts
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spvectlo .EQ *-ofsX storage for low byte of smartport
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.HS 0000000000000000 entry.
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.HS 00000000000000
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spvecthi .EQ *-ofsX storage for high byte of smartport
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.HS 0000000000000000 entry.
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.HS 00000000000000
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statparms .EQ *-ofsX # of parms (always 3 except format)
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.HS 03
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sp_unitnum .EQ *-ofsX
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.HS 00 unit number
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sp_bufptr .EQ *-ofsX
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.HS 0000 data buffer
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.HS 000000 block number (3 bytes)
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* data tables
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scnums .EQ *-ofsX table of valid mli command numbers.
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.HS D3000000
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.HS 40410000808182
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.HS 65C0C1C2C3C4C5C6
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.HS C7C8C9CACBCCCDCE
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.HS CF00D0D1D2
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pcntbl .EQ *-ofsX parameter counts for the calls
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.HS 02FFFF
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.HS FF0201FFFF030300
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.HS 04070102070A0201
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.HS 0103030404010102
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.HS 02FF020202
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* command table
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cmdtable .EQ *-ofsX
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.DA create create
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.DA destroy destroy
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.DA rename rename
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.DA setinfo setinfo
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.DA getinfo getinfo
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.DA online online
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.DA setprefx set prefix
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.DA getprefx get prefix
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.DA openf open
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.DA newline newline
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.DA readf read
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.DA writef write
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.DA closef close
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.DA flushf flush
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.DA setmark set mark
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.DA getmark get mark
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.DA seteof seteof
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.DA geteof geteof
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.DA setbuf setbuf
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.DA getbuf getbuf
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* corresponding command function bytes
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disptch .EQ *-ofsX
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.HS A0A1A2A3
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.HS 84050607
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.HS 88494A4B
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.HS 2C2D4E4F
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.HS 50515253
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dinctbl .EQ *-ofsX table to increment
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.HS 0100000200 directory usage/eof counts
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pass .EQ *-ofsX
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.HS 75
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xdosver .EQ *-ofsX
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.HS 00
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compat .EQ *-ofsX
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.HS 00
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.HS C3270D000000
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rootstuf .EQ *-ofsX
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.HS 0F02000400000800
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whichbit .EQ *-ofsX
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.HS 8040201008040201
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ofcbtbl .EQ *-ofsX
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.HS 0C0D1819151617
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inftabl .EQ *-ofsX
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.HS 1E101F2080939421
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.HS 22232418191A1B
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deathmsg .EQ *-ofsX
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.HS 20
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.AS -"RESTART SYSTEM-$01"
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.HS 20
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*** work space ***
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* note: this area is accessed by code that depends on the order of these
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* variables in the file control block and temporary directory.
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own_blk .EQ *-ofsX
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.HS 0000
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own_ent .EQ *-ofsX
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.HS 00
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own_len .EQ *-ofsX
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.HS 00
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h_credt .EQ *-ofsX
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.HS 0000 directory creation date
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.HS 0000 directory creation time
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.HS 00 version under which this dir created
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.HS 00 earliest version that it's compatible
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h_attr .EQ *-ofsX attributes (protect bit, etc.)
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.HS 00
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h_entln .EQ *-ofsX length of each entry in this directory
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.HS 00
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h_maxent .EQ *-ofsX maximum number of entries per block
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.HS 00
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h_fcnt .EQ *-ofsX current # of files in this directory
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.HS 0000
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h_bmap .EQ *-ofsX address of first allocation bitmap
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.HS 0000
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h_tblk .EQ *-ofsX total number of blocks on this unit
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.HS 0000
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d_dev .EQ *-ofsX device number of this directory entry
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.HS 00
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d_head .EQ *-ofsX address of <sub> directory header
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.HS 0000
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d_entblk .EQ *-ofsX address of block which contains entry
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.HS 0000
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d_entnum .EQ *-ofsX entry number within block
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.HS 00
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d_stor .EQ *-ofsX
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.HS 0000000000000000 file name
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.HS 0000000000000000
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d_filid .EQ *-ofsX user's identification byte
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.HS 00
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d_frst .EQ *-ofsX first block of file
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.HS 0000
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d_usage .EQ *-ofsX # of blocks allocated to this file
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.HS 0000
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d_eof .EQ *-ofsX current end of file marker
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.HS 000000
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d_credt .EQ *-ofsX
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.HS 0000 file creation date
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.HS 0000 file creation time
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d_sosver .EQ *-ofsX sos version that created this file
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.HS 00
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d_comp .EQ *-ofsX backward version compatibility
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.HS 00
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d_attr .EQ *-ofsX attributes (protect, r/w, enable, etc.)
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.HS 00
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d_auxid .EQ *-ofsX user auxilliary identification
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.HS 0000
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d_moddt .EQ *-ofsX
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.HS 0000 file's last modification date
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.HS 0000 file's last modification time
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d_dhdr .EQ *-ofsX file directory header block address
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.HS 0000
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scrtch .EQ *-ofsX scratch area for
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.HS 00000000 allocation address conversion.
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oldeof .EQ *-ofsX temp used in r/w
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.HS 000000
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oldmark .EQ *-ofsX
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.HS 000000
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xvcbptr .EQ *-ofsX used in 'cmpvcb' as a temp
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.HS 00
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vcbptr .EQ *-ofsX
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.HS 00
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fcbptr .EQ *-ofsX
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.HS 00
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fcbflg .EQ *-ofsX
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.HS 00
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reql .EQ *-ofsX
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.HS 00
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reqh .EQ *-ofsX
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.HS 00
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levels .EQ *-ofsX
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.HS 00
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totent .EQ *-ofsX
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.HS 00
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entcntl .EQ *-ofsX
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.HS 00
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entcnth .EQ *-ofsX
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.HS 00
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cntent .EQ *-ofsX
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.HS 00
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nofree .EQ *-ofsX
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.HS 00
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bmcnt .EQ *-ofsX
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.HS 00
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saptr .EQ *-ofsX
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.HS 00
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pathcnt .EQ *-ofsX
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.HS 00
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p_dev .EQ *-ofsX
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.HS 00
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p_blok .EQ *-ofsX
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.HS 0000
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bmptr .EQ *-ofsX
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.HS 00
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basval .EQ *-ofsX
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.HS 00
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half .EQ *-ofsX
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.HS 00
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* bitmap info tables
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bmastat .EQ *-ofsX
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.HS 00
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bmadev .EQ *-ofsX
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.HS 00
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bmadadr .EQ *-ofsX
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.HS 0000
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bmacmap .EQ *-ofsX
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.HS 00
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tposll .EQ *-ofsX
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.HS 00
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tposlh .EQ *-ofsX
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.HS 00
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tposhi .EQ *-ofsX
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.HS 00
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rwreql .EQ *-ofsX
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.HS 00
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rwreqh .EQ *-ofsX
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.HS 00
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nlchar .EQ *-ofsX
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.HS 00
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nlmask .EQ *-ofsX
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.HS 00
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ioaccess .EQ *-ofsX has a call been made to
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.HS 00 disk device handler ?
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cmdtemp .EQ *-ofsX
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.HS 00
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bkbitflg .EQ *-ofsX used to set or clear backup bit
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.HS 00
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duplflag .EQ *-ofsX
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.HS 00
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vcbentry .EQ *-ofsX
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.HS 00
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* xdos temporary variables
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namcnt .EQ *-ofsX
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.HS 00
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rnptr .EQ *-ofsX
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.HS 00
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namptr .EQ *-ofsX
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.HS 00
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vnptr .EQ *-ofsX
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.HS 00
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prfxflg .EQ *-ofsX
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.HS 00
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cferr .EQ *-ofsX
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.HS 00
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* deallocation temporary variables
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firstbl .EQ *-ofsX
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.HS 00
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firstbh .EQ *-ofsX
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.HS 00
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stortyp .EQ *-ofsX
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.HS 00
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deblock .EQ *-ofsX
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.HS 0000
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dtree .EQ *-ofsX
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.HS 00
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dsap .EQ *-ofsX
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.HS 00
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dseed .EQ *-ofsX
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.HS 0000
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topdest .EQ *-ofsX
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.HS 00
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dtmpx .EQ *-ofsX
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.HS 00
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loklst .EQ *-ofsX look list of recognized device numbers
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dealbufl .EQ *-ofsX
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.HS 0000000000000000
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dealbufh .EQ *-ofsX
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.HS 0000000000000000
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cbytes .EQ *-ofsX
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.HS 0000
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.HS 00 cbytes+2 must = 0
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bufaddrl .EQ *-ofsX
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.HS 00
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bufaddrh .EQ *-ofsX
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.HS 00
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goadr .EQ *-ofsX
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.HS 0000
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delflag .EQ *-ofsX used by 'detree' to know if called
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.HS 00 from delete (destroy).
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* zero fill to page boundary - 3 ($FEFD). so that cortland flag stays
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* within page boundary.
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.HS 00000000000000
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.HS 0000000000
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.DA calldisp
|
||
cortflag .EQ *-ofsX cortland flag. 1 = Cortland system
|
||
.HS 00 (must stay within page boundary)
|
||
|
||
* end of obj mli_2
|
||
*--------------------------------------
|
||
MAN
|
||
SAVE USR/SRC/PRODOS.203/PRODOS.S.XDOS.M
|
||
LOAD USR/SRC/PRODOS.203/PRODOS.S
|
||
ASM
|