NEW
  AUTO 3,1
				.LIST OFF
*--------------------------------------
HIS.Init		>LDYAI HISTORY.MAX		Get a buffer for History

				>SYSCALL StrVNew
				bcs .9

				>STA.G HIS.hBuf

				>STZ.G HIS.Count
				>STA.G HIS.Index
				>STA.G HIS.LRU
.9				rts
*--------------------------------------
HIS.Add			>LDA.G HIS.hBuf
				beq .9

				>LDA.G HIS.Count
				cmp #HIS.MAX
				bcc .2

				>LDA.G HIS.LRU
				tax
				inc
				cmp #HIS.MAX
				bne .1

				lda #0

.1				>STA.G HIS.LRU
				bra .7

.2				tax
				>INC.G HIS.Count

.7				>PUSHB.G HIS.hBuf
				>PUSHBI 0
				txa
				>PUSHA
				>PUSHW ZPCLBuf
				>SYSCALL StrVSet

				>STZ.G HIS.Index		Reset Index
.9				rts
*--------------------------------------
HIS.Select		>LDA.G HIS.Count
				beq .8

				>STZ.G HIS.Index

.1				jsr HIS.GetIndex
				bcs .9

				>PUSHW L.MSG.HISTORY
				>PUSHB.G HIS.Index
				>PUSHW ZPCLBuf
				>PUSHBI 3
				>SYSCALL PrintF
				bcs .9

				>INC.G HIS.Index
				>CMP.G HIS.Count
				bne .1
				
				>PUSHW L.MSG.HISTORYPROMPT
				>PUSHBI 0
				>SYSCALL PrintF
				
				>SYSCALL GetChar
				bcs HIS.Select.RTS
				
				
				
*				>PUSHW L.MSG.ECHOCRLF
*				>PUSHBI 0
*				>SYSCALL PrintF

				jsr CL.PrintPrompt
				bcs .9
				
				bra HIS.Reset
				
.8				clc
.9

HIS.Select.RTS	rts
*--------------------------------------
HIS.GetPrev		>LDA.G HIS.hBuf
				beq HIS.Select.RTS

				>LDA.G HIS.Count
				beq HIS.Select.RTS		empty history,nothing to do

				>LDA.G HIS.Index
				bne .1

				>LDA.G HIS.Count

.1				dec
				bra HIS.GetToCL
*--------------------------------------
HIS.GetNext		>LDA.G HIS.hBuf
				beq HIS.Select.RTS

				>LDA.G HIS.Count
				beq HIS.Select.RTS		empty history,nothing to do

				>LDA.G HIS.Index
				inc
				>CMP.G HIS.Count
				bne HIS.GetToCL

HIS.Reset		>STZ.G HIS.Index
				jmp CL.CLR
*--------------------------------------
HIS.GetToCL		>STA.G HIS.Index

				jsr CL.CLR

				jsr HIS.GetIndex
				bcs .9

				ldy #$ff

.1				iny
				lda (ZPCLBuf),y
				bne .1

				tya

				>STA.G CL.Ptr
				>STA.G CL.Len
				jmp CL.PrintCLBuf

.9				rts
*--------------------------------------
HIS.GetIndex	>PUSHB.G HIS.hBuf
				>PUSHBI 0
				>PUSHB.G HIS.Index
				>PUSHW ZPCLBuf
				>SYSCALL StrVGet
				rts
*--------------------------------------
MAN
SAVE usr/src/bin/sh.s.his
LOAD usr/src/bin/sh.s
ASM