NEW
  AUTO 3,1
				.LIST OFF
*--------------------------------------
RT.NOT			>PULLA
				ora (pStack)
				beq .1

				lda #1
	
.1				dec
				sta (pStack)
				>PUSHA
				rts
*--------------------------------------
RT.StrAdd		ldx #2
				jsr RT.StrPullX

				jsr RT.StrPull
			
				>PUSHW ZPStrBuf1
				>PUSHW ZPStrBuf2
				>SYSCALL strcat
				
				>PUSHWZ					RVALUE in buffer
				
				clc
				rts
*--------------------------------------
RT.StrCmp		ldx #2
				jsr RT.StrPullX

				jsr RT.StrPull
			
				>PUSHW ZPStrBuf1
				>PUSHW ZPStrBuf2
				>SYSCALL strcmp
				
				>PUSHYA
				
				clc
				rts
*--------------------------------------
* on stack : Src StrID
* Y,X : Dst StrID
*--------------------------------------
RT.StrSet		sty STRID
				stx STRID+1
				
				ldy #1
				lda (pStack),y
				ora (pStack)
				beq .1
				
				>PUSHB hStrings

				ldy #2
				lda (pStack),y
				>PUSHA
				lda (pStack),y
				>PUSHA

				>PUSHW ZPStrBuf1
				>SYSCALL StrVGet

.1				>PUSHB hStrings
				>PUSHW STRID
				>PUSHW ZPStrBuf1
				>SYSCALL StrVSet

				inc pStack
				inc pStack

				rts
*--------------------------------------
RT.StrOut		jsr RT.StrPull

				ldy #S.PS.hStdOut
				lda (pPS),y
				>PUSHA
				
				>PUSHW ZPStrBuf1
				>PUSHBI 0
				>SYSCALL fprintf
				rts
*--------------------------------------
RT.StrPull		ldx #0

RT.StrPullX		>PULLW STRID

				ora STRID
				beq .8

				lda #0
				sta (ZPStrBuf1,x)

				>PUSHB hStrings
				>PUSHW STRID
				>PUSHW ZPStrBuf1,x
				>SYSCALL StrVGet

.8				rts
*--------------------------------------
RT.IntSet		sty VAR.ADDR
				stx VAR.ADDR+1
				
RT.IntUpd		>PULLA
				sta (VAR.ADDR)
				>PULLA
				ldy #1
				sta (VAR.ADDR),y
				rts
*--------------------------------------
RT.IntGet		sty VAR.ADDR
				stx VAR.ADDR+1
				
				ldy #1
				lda (VAR.ADDR),y
				>PUSHA
				lda (VAR.ADDR)
				>PUSHA
				rts
*--------------------------------------
RT.IntOut		>PUSHW L.MSG.INT16

				ldy #3
				lda (pStack),y
				>PUSHA
				lda (pStack),y
				>PUSHA

				>PUSHBI 2
				>SYSCALL PrintF
				inc pStack
				inc pStack
				rts
*--------------------------------------
RT.DATEd		ldx #0
				bra RT.TIMEd.1
				
RT.TIMEd		ldx #2
	
RT.TIMEd.1		>PUSHW ZPStrBuf1
				>PUSHW L.FMT.DATE,x
				>PUSHEA.G TimeBuf
				
				>PUSHEA.G TimeBuf
				>SYSCALL Time
				
				>SYSCALL StrFTime

				>PUSHWZ					RVALUE in buffer

				rts
*--------------------------------------
RT.GET			jsr RT.GetChar
				sta (ZPStrBuf1)

				ldy #1
				
				lda #0
				sta (ZPStrBuf1),y
				
				>PUSHWZ					RVALUE in buffer
				clc
				rts
*--------------------------------------
RT.INPUT		lda #0
				sta (ZPStrBuf1)
				
				stz ZPPtr1
				
				ldx #0					OUT.ELW
				jsr RT.OUTX
				
.1				jsr RT.GetChar
				bcs .9
				
				ldy ZPPtr1

				cmp #C.SPACE
				bcs .7
				
				cmp #C.CR
				bne .2
				
				lda #0
				sta (ZPStrBuf1),y
				
				ldx #4					OUT.CRLF
				jsr RT.OUTX
				
				bra .8
				
.2				cmp #C.BS
				bne .1
				
				cpy #0
				beq .1
					
				ldx 6					OUT.BSSPBS
				jsr RT.OUTX

				dec ZPPtr1
				bra .1
				
.7				cpy #255
				bcs .1
				
				sta (ZPStrBuf1),y
				>SYSCALL PutChar
				inc ZPPtr1
				bra .1
				
.8				ldx #2					OUT.DLW
				jsr RT.OUTX
				
				>PUSHWZ					RVALUE in buffer
				clc

.9				rts
*--------------------------------------
RT.LEFTd		>PULLB ZPPtr2			cnt
				inc pStack

				jsr RT.StrPull

				ldy ZPPtr2
				lda #0
				sta (ZPStrBuf1),y

.8				>PUSHWZ					RVALUE in buffer
				clc
				rts
*--------------------------------------
RT.LEN			jsr RT.StrPull

				ldy #$ff

.1				iny
				lda (ZPStrBuf1),y
				bne .1
				
				>PUSHYA
				rts
*--------------------------------------
RT.MIDd			>PULLB ZPPtr2+1			len
				inc pStack
				>PULLB ZPPtr2			start
				inc pStack

				jsr RT.StrPull
				
				ldy #0

.1				lda (ZPStrBuf1),y
				beq .8

				iny
				cpy ZPPtr2				start
				bne .1

				tya
				clc
				adc ZPStrBuf1
				sta ZPPtr1

				lda ZPStrBuf1+1
				adc #0
				sta ZPPtr1+1

				ldy #$ff

.3				iny
				cpy ZPPtr2+1			len
				beq .8
				
				lda (ZPPtr1),y
				sta (ZPStrBuf1),y
				bne .3

.8				lda #0
				sta (ZPStrBuf1),y

.80				>PUSHWZ					RVALUE in buffer
				clc
				rts
*--------------------------------------
RT.RIGHTd		>PULLB ZPPtr2			cnt
				inc pStack

				jsr RT.StrPull
				
				ldy #$ff

.1				iny
				lda (ZPStrBuf1),y
				bne .1
				
				tya
				sec
				sbc ZPPtr2
				bcc .8
				beq .8
				
				clc
				adc ZPStrBuf1
				sta ZPPtr1

				lda ZPStrBuf1+1
				adc #0
				sta ZPPtr1+1

				ldy #$ff
				
.3				iny
				lda (ZPPtr1),y
				sta (ZPStrBuf1),y
				bne .3
				
.8				>PUSHWZ					RVALUE in buffer
				clc
				rts				
*--------------------------------------
RT.STRd			>PULLYA					int
				pha
				>PUSHW ZPStrBuf1
				>PUSHW L.MSG.INT16
				pla
				>PUSHYA
				>PUSHBI 2
				>SYSCALL sprintf

				>PUSHWZ					RVALUE in buffer

				rts
*--------------------------------------
RT.VAL			>PULLYA					str
				>SYSCALL atoi
				>PUSHYA
				rts
*--------------------------------------
RT.OUTCRLF		ldx #4					CRLF

RT.OUTX			ldy #S.PS.hStdOut
				lda (pPS),y
				>PUSHA
				>PUSHW L.OUT,x
				>SYSCALL FPutS
				rts
*--------------------------------------
* TODO: handle lost conn CS and remap VT100 ESC codes
*--------------------------------------
RT.GetChar		>SYSCALL GetChar
				cmp #C.CR
				bne .8
				
				>SYSCALL GetChar		LF
				
				lda #C.CR
				
.8				clc
				rts
*--------------------------------------
MAN
SAVE usr/src/bin/acos.s.rt
LOAD usr/src/bin/acos.s
ASM