mirror of
https://github.com/RevCurtisP/C02.git
synced 2024-11-26 13:49:21 +00:00
104 lines
2.8 KiB
Plaintext
104 lines
2.8 KiB
Plaintext
|
;Screen Control Assembly Language Routines for Oric-1
|
||
|
|
|
||
|
|
; Display Colors
|
||
|
|
BLACK EQU $00 Black
|
||
|
|
RED EQU $00 Red
|
||
|
|
GREEN EQU $00 Green
|
||
|
|
YELLOW EQU $00 Yellow
|
||
|
|
BLUE EQU $00 Blue
|
||
|
|
MAGENT EQU $00 Magenta
|
||
|
|
CYAN EQU $00 Cyan
|
||
|
|
WHITE EQU $00 White
|
||
|
|
|
||
|
|
;ASCII Screen Control Characters
|
||
|
|
CHRBCK EQU $7E Backspace
|
||
|
|
CHRBEL EQU $FD Beep (Buzzer)
|
||
|
|
CHRCLR EQU $7D Clear Screen
|
||
|
|
CHRDEL EQU $FE Delete (Character)
|
||
|
|
CHRDWN EQU $1C Cursor Down
|
||
|
|
CHRFLS EQU $00 Flash On
|
||
|
|
CHRHOM EQU $00 Home (None)
|
||
|
|
CHRINS EQU $FF Insert (Character)
|
||
|
|
CHRLFT EQU $1E Cursor Left
|
||
|
|
CHRRGT EQU $1F Cursor Right
|
||
|
|
CHRRTN EQU $9B Return (End of Line)
|
||
|
|
CHRTAB EQU $7F Tab
|
||
|
|
CHRUP EQU $1B Cursor Up
|
||
|
|
|
||
|
|
;ATASCII Symbolic Characters
|
||
|
|
CHRBLK EQU $A0 Block
|
||
|
|
|
||
|
|
;ASCII Box Drawing Characters
|
||
|
|
BOXBLC EQU $0A Bottom Left Corner
|
||
|
|
BOXBRC EQU $03 Bottom Right Corner
|
||
|
|
BOXBCT EQU $18 Bottom to Cetter Tee
|
||
|
|
BOXCTR EQU $13 Center Cross
|
||
|
|
BOXHLN EQU $12 Horizontal Line
|
||
|
|
BOXLCT EQU $01 Left To Center T)
|
||
|
|
BOXRCT EQU $04 Right To Center T
|
||
|
|
BOXTLC EQU $11 Top Left Corner
|
||
|
|
BOXTRC EQU $05 Top Right Corner
|
||
|
|
BOXTCT EQU $17 Top to Center T
|
||
|
|
BOXVLN EQU $7C Vertical Line (|)
|
||
|
|
|
||
|
|
;Set Background Color
|
||
|
|
;Args: A = Atari Color Code
|
||
|
|
;Uses: TEMP0 - Temporary Storage
|
||
|
|
;Affects: A,C,N,Z
|
||
|
|
SCRBKG: AND $07 ;Strip High Bits
|
||
|
|
ORA $90 ;Convert to Control Character
|
||
|
|
JMP PRCHR ;Print Character and Return
|
||
|
|
|
||
|
|
;Set Text Color
|
||
|
|
;Args: A = Vic color code
|
||
|
|
;Affects: A,X,C,N,Z
|
||
|
|
SCRTXT: AND $07 ;Strip High Bits
|
||
|
|
ORA $80 ;Convert to Control Character
|
||
|
|
JMP PRCHR ;Print Character and Return
|
||
|
|
|
||
|
|
;Clear Screen
|
||
|
|
;Affects A,C,N,Z
|
||
|
|
SCRCLR: LDA #CHRCLR ;Load Clear Screen Character
|
||
|
|
JMP PRCHR ;Print it and Return
|
||
|
|
|
||
|
|
;Move Cursor Down
|
||
|
|
;Affects A,C,N,Z
|
||
|
|
SCRDWN: LDA #CHRDWN ;Load Cursor Down Character
|
||
|
|
JMP PRCHR ;Print it and Return
|
||
|
|
|
||
|
|
;Move Cursor To Home Position
|
||
|
|
;Affects A,C,N,Z
|
||
|
|
SCRHOM: LDA #0 ;Column 0
|
||
|
|
TAY ;Row 0
|
||
|
|
BEQ SRCMOV ;Move Cursor
|
||
|
|
|
||
|
|
;Move Cursor Left
|
||
|
|
;Affects A,C,N,Z
|
||
|
|
SCRLFT: LDA #CHRLFT ;Load Cursor Left Character
|
||
|
|
JMP PRCHR ;Print it and Return
|
||
|
|
|
||
|
|
;Move Cursor Right
|
||
|
|
;Affects A,C,N,Z
|
||
|
|
SCRRGT: LDA #CHRRGT ;Load Cursor Left Character
|
||
|
|
JMP PRCHR ;Print it and Return
|
||
|
|
|
||
|
|
;Move Cursor Up
|
||
|
|
;Affects A,C,N,Z
|
||
|
|
SCRUP: LDA #CHRUP ;Load Cursor Left Character
|
||
|
|
JMP PRCHR ;Print it and Return
|
||
|
|
|
||
|
|
;Move Cursor to Specified Coordinates
|
||
|
|
;Args: A = screen column (0 = top)
|
||
|
|
; Y = screen line (0 = left)
|
||
|
|
SCRMOV: RTS ;Not Yet Implemented
|
||
|
|
|
||
|
|
;Get Cursor Position
|
||
|
|
;Returns: A = current cursor column
|
||
|
|
; Y = current cursor row
|
||
|
|
SCRPOS: RTS ;Not Yet Implemented
|
||
|
|
|
||
|
|
;Get Screen Size
|
||
|
|
;Returns: A = width of screen in columns
|
||
|
|
; Y = height of screen in rows
|
||
|
|
SCRSIZ: RTS ;Not Yet Implemented
|