A2osX/SYS/KERNEL.S.SHARED.txt

NEW
  AUTO 3,1
*--------------------------------------
SHARED.GetKeyCharY	
				sta CLRREADAUX
				lda (ZPSListDataPtr),y
				sta SETREADAUX
				beq SHARED.IsDigit.9
SHARED.IsIDValid
				cmp #'.'
				beq SHARED.IsDigit.8

				cmp #'_'
				beq SHARED.IsDigit.8
SHARED.IsDigitOrL
				cmp #'z'+1
				bcs SHARED.IsDigit.RTS
				cmp #'a'
				bcs SHARED.IsDigit.8
SHARED.IsDigitOrUC
				cmp #'Z'+1
				bcs SHARED.IsDigit.RTS
				cmp #'A'
				bcs SHARED.IsDigit.8

				jmp ZP.IsDigit
SHARED.IsDigit.9
				sec
				rts
				
SHARED.IsDigit.8
				clc
SHARED.IsDigit.RTS
				rts
*--------------------------------------
SHARED.IsHexDigit
				jsr ZP.IsDigit
				bcc .8
				
				cmp #'A'
				bcc SHARED.IsDigit.9
				cmp #'F'+1
				bcc .1
				
				cmp #'a'
				bcc SHARED.IsDigit.9
				cmp #'f'+1
				bcs SHARED.IsDigit.RTS

				eor #$20			
.1					
*				clc
				sbc #'A'-11			cc so A->10 (11-CC)
				clc
				
.8				and #$0F					
				rts
*--------------------------------------
SHARED.SetKeyCharY
				sta CLRWRITEAUX
				sta (ZPSListDataPtr),y
				sta SETWRITEAUX
				rts
*--------------------------------------
SHARED.GetDataByte
				sta CLRREADAUX
				lda (ZPSListDataPtr)
				sta SETREADAUX
				bra SHARED.SetDataByte.1
*--------------------------------------
SHARED.SetDataByte
				sta CLRWRITEAUX
				sta (ZPSListDataPtr)
				sta SETWRITEAUX
SHARED.SetDataByte.1				
				inc ZPSListDataPtr
				bne .8
				inc ZPSListDataPtr+1
.8				rts
*--------------------------------------
SHARED.TXTPTR.GetY
				sta CLRREADAUX
				lda (TXTPTR),y
				sta SETREADAUX
				rts
*--------------------------------------
SHARED.TXTPTR.GetNext
				sta CLRREADAUX
				lda (TXTPTR)
				sta SETREADAUX
				beq .9
				inc TXTPTR
				bne .9
				inc TXTPTR+1
.9				rts				
*--------------------------------------
SHARED.SPtr1PPtr2
				>STYA ZPPtr1
				>PULLW ZPPtr2
				rts
*--------------------------------------
SHARED.SPtr2PPtr1
				>STYA ZPPtr2
				>PULLW ZPPtr1
				rts
*--------------------------------------
SHARED.GetCharPtr1
				lda (ZPPtr1)
				bne SHARED.NextCharPtr1
				rts
				
SHARED.PutCharPtr1
				sta (ZPPtr1)
SHARED.NextCharPtr1				
				inc ZPPtr1
				bne .8
				inc ZPPtr1+1			never Z
.8				rts
*--------------------------------------
SHARED.AddYp1ToPtr1
				sec	
				.HS 90					BCC
SHARED.AddYToPtr1	
				clc
				tya
				adc ZPPtr1
				sta ZPPtr1
				bcc .8
				inc ZPPtr1+1
.8				rts
*--------------------------------------
SHARED.AddYp1ToPtr2
				sec	
				.HS 90					BCC
SHARED.AddYToPtr2	
				clc
				tya
				adc ZPPtr2
				sta ZPPtr2
				bcc .8
				clc						keep CC as some JMP exit here
				inc ZPPtr2+1
.8				rts
*--------------------------------------
SHARED.GetCharPtr2
				lda (ZPPtr2)
				bne SHARED.NextCharPtr2
				rts
SHARED.PutCharPtr2
				sta (ZPPtr2)
SHARED.NextCharPtr2
				inc ZPPtr2
				bne .8
				inc ZPPtr2+1
.8				rts
*--------------------------------------
MAN
SAVE USR/SRC/SYS/KERNEL.S.SHARED
LOAD USR/SRC/SYS/KERNEL.S
ASM