A2osX/SYS/KERNEL.S.BLISTX.txt
2022-11-02 07:54:30 +01:00

119 lines
1.9 KiB
Plaintext
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

NEW
AUTO 3,1
*--------------------------------------
IBlkPtr .EQ ZPMEMMGR+12
DBlkPtr .EQ ZPMEMMGR+14
*--------------------------------------
KeyID .EQ *
iByte .BS 1
iBlk .BS 1
*--------------------------------------
BLISTX.New sta SLISTX.Opt
>LDYAI 128 32k Max before out of memory!!!
ldx #S.MEM.F.INIT0+8 index
jsr MEM.GetMem.YAX
bcs .9
>STYA IBlkPtr
stx .8+1
>LDYAI 256
ldx #4 data
jsr MEM.GetMem.YAX
bcs .9
>STYA DBlkPtr
lda #0
sta (DBlkPtr)
lda SLISTX.Opt
sta (IBlkPtr)
txa
ldy #1
sta (IBlkPtr),y
.8 lda #$ff SELF MODIFIED
* clc
.9 rts
*--------------------------------------
BLISTX.Free pha
jsr K.GetMemPtr
>STYA .1+1
ldx #1
.1 lda $ffff,x SELF MODIFIED
beq .8
phx
jsr K.FreeMem
plx
inx
bra .1
.8 pla
jmp K.FreeMem
*--------------------------------------
BLISTX.GetNByte ldy iByte
lda (DBlkPtr),y
BLISTX.2NByte inc iByte
bne .8
pha
jsr BLISTX.2NBlk
pla
.8 rts
*--------------------------------------
BLISTX.AddByte phy
ldy iByte
sta (DBlkPtr),y
inc iByte
bne .8
phx
>LDYAI 256
ldx #4
jsr MEM.GetMem.YAX
bcs .9
>STYA DBlkPtr
txa
inc iBlk
ldy iBlk
sta (IBlkPtr),y
* stz iByte
plx
.8 ply
clc
rts
.9 plx
ply
rts
*--------------------------------------
BLISTX.SetBlkByte
ldy iByte
sta (DBlkPtr),y
inc iByte
bne BLISTX.RTS
*--------------------------------------
BLISTX.2NBlk inc iBlk
ldy iBlk
lda (IBlkPtr),y
jsr K.GetMemPtr
>STYA DBlkPtr
BLISTX.RTS rts
*--------------------------------------
MAN
SAVE usr/src/sys/kernel.s.blistx
LOAD usr/src/sys/kernel.s
ASM