A2osX/SCMASM.30/IO.S.IIE.VIDEX.txt

220 lines
5.1 KiB
Plaintext
Raw Permalink 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
*--------------------------------------
.PH $A800
*--------------------------------
VIDEX.SCREEN.WIDTH .EQ $A5
*--------------------------------
VIDEX.SLOT .EQ 3 ASSUME SLOT 3
*--------------------------------
VIDEX.CARD .EQ VIDEX.SLOT*256+$C000
VIDEX.COUT1 .EQ VIDEX.SLOT*256+$C007
VIDEX.REG .EQ VIDEX.SLOT*16+$C080
VIDEX.DATA .EQ VIDEX.SLOT*16+$C081
*--------------------------------
VIDEX.BASEL .EQ $0478+VIDEX.SLOT
VIDEX.BASEH .EQ $04F8+VIDEX.SLOT
VIDEX.HORIZ .EQ $0578+VIDEX.SLOT
VIDEX.CHAR .EQ $0678+VIDEX.SLOT
*--------------------------------
* I/O VECTORS -- 3 BYTES EACH
*--------------------------------
JMP VIDEX.INIT
JMP VIDEX.WARM
JMP VIDEX.READ.KEY.WITH.CASE
JMP VIDEX.GET.HORIZ.POSN
LDA #$8C ^L--HOME
.HS 2C
LDA #$9D ^]--CLREOL
.HS 2C
LDA #$8B ^K--CLREOP
.HS 2C
LDA #$9F ^_--UP
.HS 2C
LDA #$8A ^J--DOWN
.HS 2C
LDA #$88 ^H--LEFT
.HS 2C
LDA #$9C ^\--RIGHT
NOP
JMP MON.COUT
JMP VIDEX.PICK.SCREEN
JMP VIDEX.HTABX
JMP VIDEX.HTAB
JMP VIDEX.VTAB
*---Case Toggle MUST go here-----
LDA CASEFLG
EOR #$80
STA CASEFLG
RTS
*--------------------------------
* VARIABLE LENGTH ROUTINES
*--------------------------------
VIDEX.HTABX
PHA
TXA
JSR VIDEX.HTAB
PLA
RTS
*--------------------------------
VIDEX.GET.HORIZ.POSN
LDA VIDEX.HORIZ
RTS
*--------------------------------
VIDEX.VTAB
STA CV
LDA VIDEX.HORIZ
VIDEX.HTAB
PHA SAVE HORIZ POSN
LDA #$9E
JSR VIDEX.COUT1
PLA GET HORIZ POSN
CLC
ADC #$A0
JSR VIDEX.COUT1
LDA CV
ORA #$A0
JMP VIDEX.COUT1
*--------------------------------
VIDEX.INIT
LDA #80
STA VIDEX.SCREEN.WIDTH
STA CASEFLG CLEAR CASEFLG (BIT7=0)
LDA #$8C CLEAR SCREEN AND START VIDEX-80
JSR VIDEX.CARD
VIDEX.INSTALL.VECTORS
LDX #1
.1 LDA VIDEX.VECTORS,X
STA $36,X
STA VIDEX.SLOT*2+$BE10,X
LDA VIDEX.VECTORS+2,X
BIT F.EXEC
BMI .2
STA $38,X
.2 STA VIDEX.SLOT*2+$BE20,X
DEX
BPL .1
RTS
*--------------------------------
VIDEX.VECTORS
.DA VIDEX.COUT
.DA VIDEX.RDKEY
*--------------------------------
VIDEX.WARM
CLD
LDX CV
JSR MON.INIT
STX CV
JMP VIDEX.INSTALL.VECTORS
*--------------------------------
* READ KEY WITH CASE CONTROL
*--------------------------------
VIDEX.READ.KEY.WITH.CASE
JSR MON.RDKEY
ORA #$80 REQUIRED FOR EXEC COMMAND
CLC SIGNAL NO OPEN APPLE
RTS
*--------------------------------
VIDEX.RDKEY
CLD
LDA #$0A SELECT BLINKING DOUBLE UNDERLINE CURSOR
STA VIDEX.REG
LDA #$67
STA VIDEX.DATA
LDA #$0B
STA VIDEX.REG
LDA #$08
STA VIDEX.DATA
.1 LDA $C000
BPL .1
STA $C010
PHA
LDA #$0A HIDE THE CURSOR
STA VIDEX.REG
LDA #$09
STA VIDEX.DATA
PLA
CMP #$8D
BNE .2
JSR IO.CLREOL
LDA #$8D
.2 BIT CASEFLG TEST CASE CONVERSION FLAG
BPL .6 DO NOT CONVERT
CMP #$B0
BCC .6 DO NOT CONVERT
BIT $C063 TEST PADDLE BUTTON
BMI .5 NO SHIFTKEY PRESSED
CMP #$B0
BEQ .4
CMP #$C0
BNE .3
LDA #$D0
.3 CMP #$DB
BCC .6
AND #$CF
BNE .6
.4 LDA #$DD
.5 ORA #$20
.6 AND #$7F
STA VIDEX.CHAR
ORA #$80
SEC
RTS
*--------------------------------
VIDEX.COUT
CLD
CMP #$80 NORMAL OR INVERSE?
BCS .1 ...NORMAL
PHA ...80-COLUMN
LDA #$8F SELECT INVERSE DISPLAY
JSR VIDEX.COUT1
PLA
ORA #$80 MAKE PRINTABLE CHARACTER
CMP #$A0
BCS .2
ORA #$40
.2 JSR VIDEX.COUT1
LDA #$8E SELECT NORMAL DISPLAY
.1 JMP VIDEX.COUT1
*--------------------------------
* GET CHARACTER OFF CURRENT SCREEN LINE, COLUMN (Y)
*--------------------------------
VIDEX.PICK.SCREEN
STX SAVEX
BIT $CFFF TURN ON $C800 VIDEO SPACE
BIT VIDEX.CARD
*---CALCULATE POSITION-----------
CLC
TYA COLUMN 0-79
ADC VIDEX.BASEL
PHA
LDA #0
ADC VIDEX.BASEH
PHA
ASL
AND #$0C USE BIT 0 AND 1 FOR PAGING
TAX
LDA VIDEX.REG,X
PLA
LSR ODD/EVEN PAGE
PLA
TAX
*---GET CHAR FROM WINDOW---------
LDA $CC00,X
BCC .1
LDA $CD00,X
.1 ORA #$80
STA VIDEX.CHAR
LDX SAVEX
RTS
*--------------------------------
SAVEX .BS 1
CASEFLG .BS 1
*--------------------------------------
.EP
*--------------------------------------
MAN
SAVE usr/src/scmasm.30/io.s.videx
LOAD usr/src/scmasm.30/scmasm.s
ASM