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Attempt to fix line clipping

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This commit is contained in:
Bill Chatfield 2024-02-24 02:04:14 -05:00
parent fc9eeda779
commit 8ace07d469
1 changed files with 66 additions and 58 deletions
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124
more.merlin.s
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@ -204,6 +204,21 @@ SET23 MAC
STA ]1
<<<
********************************
* *
* STANDARD ASSEM LANG *
* BACKWARDS COPY OF 1 BYTE *
* A IS DESTROYED *
* ]1 DESTINATION *
* ]2 SOURCE *
* *
********************************
COPY_B MAC
LDA ]2
STA ]1
<<<
********************************
* *
* MAIN PROGRAM *
@ -485,24 +500,23 @@ PRSTRBYTES PUSHY
********************************
VIEWFILE
DO TRACE
PUTS ENVIEW
FIN
SET1 LINENUM ;INIT LINE NUMBER
SET1 LINEIDX ;POSITION IN LINE
:LOOP JSR PRODOS_MLI ;CALL PRODOS TO READ FILE
DB READ ;SPECIFY PRODOS READ COMMAND
DA READPARMS ;READ PARAMETERS
BNE :READERR
JSR WRITEBUF ;WRITE TO SCREEN WHAT WAS READ
LDA #1 ;PREPARE FOR NEXT OP
CMP USRQUIT ;IF USER WANTS TO QUIT, THEN
BEQ :ENDLOOP ;EXIT THE LOOP
JMP :LOOP ;ELSE, GET THE NEXT BUFFER
:READERR JSR ERRPROC
:ENDLOOP NOP
RTS
DO TRACE
PUTS ENVIEW
FIN
COPY_B LINEIDX;#1 ;POSITION IN LINE
:LOOP JSR PRODOS_MLI ;CALL PRODOS TO READ FILE
DB READ ;SPECIFY PRODOS READ COMMAND
DA READPARMS ;READ PARAMETERS
BNE :READERR
JSR WRITEBUF ;WRITE TO SCREEN WHAT WAS READ
LDA #1 ;PREPARE FOR NEXT OP
CMP USRQUIT ;IF USER WANTS TO QUIT, THEN
BEQ :ENDLOOP ;EXIT THE LOOP
JMP :LOOP ;ELSE, GET THE NEXT BUFFER
:READERR JSR ERRPROC
:ENDLOOP NOP
RTS
********************************
* *
@ -510,39 +524,33 @@ VIEWFILE
* *
********************************
WRITEBUF PUSHY
LDY #0 ;INIT CHAR COUNTER VARIABLE
:LOOP CPY READCNT ;COMPARE TO MAX CHARS
BEQ :ENDLOOP
LDA (ZP_A1L),Y ;GET CHAR FROM BUFFER
ORA #%10000000 ;TURN ON HIGH BIT FOR PRINTING
JSR WRITECHAR ;COUT PRESERVES ACCUM
*
* CHECK END OF LINE
*
CMP #CR_HIBIT ;COMPARE TO CARRIAGE RETURN
BNE :CONT ;IF NOT END OF LINE, NEXT CHAR
INC LINENUM ;NEXT LINE HAS BEEN REACHED
WRITEBUF PUSHY
LDY #0 ;INIT CHAR COUNTER VARIABLE
:LOOP CPY READCNT ;COMPARE TO MAX CHARS
BEQ :ENDLOOP
LDA (ZP_A1L),Y ;GET CHAR FROM BUFFER
ORA #%10000000 ;TURN ON HIGH BIT FOR PRINTING
JSR WRITECHAR ;COUT PRESERVES ACCUM
*
* CHECK AT END OF PAGE
*
LDA LINENUM
CMP #SCR_HGHT ;AT BOTTOM OF SCREEN?
BNE :CONT ;NO? THEN NEXT CHAR
JSR STATBAR ;YES? THEN SHOW THE STATUS BAR
LDA #1 ;SETUP FOR NEXT LINE
CMP USRQUIT ;DID USER ASK TO QUIT
BEQ :ENDLOOP ;YES? THEN END SUB
:CONT INY ;STATBAR HAS ADJUSTED LINENUM
JMP :LOOP
:ENDLOOP NOP
POPY
LDA CV ;CURSOR VERTICAL SCREEN LINE
CMP #SCR_HGHT ;AT BOTTOM OF SCREEN?
BNE :CONT ;NO? THEN NEXT CHAR
JSR STATBAR ;YES? THEN SHOW THE STATUS BAR
LDA #1 ;SETUP FOR NEXT LINE
CMP USRQUIT ;DID USER ASK TO QUIT
BEQ :ENDLOOP ;YES? THEN END SUB
:CONT INY ;STATBAR HAS ADJUSTED LINENUM
JMP :LOOP
:ENDLOOP NOP
POPY
DO TRACE
PUTS EXWRITEBUF
FIN
DO TRACE
PUTS EXWRITEBUF
FIN
RTS
RTS
********************************
* *
@ -551,19 +559,19 @@ WRITEBUF PUSHY
* PRESERVES ACCUMULATOR *
* *
********************************
WRITECHAR STA CHAR
LDA LINEIDX
WRITECHAR STA CHAR ;DON'T LOOSE THE CHARACTER
CMP #CR_HIBIT ;COMPARE TO CARRIAGE RETURN
BNE :NOT_EOL ;IF NOT END OF LINE, PRINT
INC CV ;FORCE DOWN 1 LINE ON SCREEN
COPY_B LINEIDX;#1 ;RESET TO BEGINNING OF LINE
JMP :ENDSUB ;NOTHING MORE TO DO FOR EOL
:NOT_EOL LDA LINEIDX ;GET CURSOR HORIZ COL
CMP SCR_WDTH ;COMPARE WITH SCREEN WIDTH
BPL :OFF_SCR ;DON'T PRINT IF OFF SCREEN
LDA CHAR
BPL :ENDSUB ;DON'T PRINT IF OFF SCREEN
LDA CHAR ;ON SCREEN, SO PRINT IT
JSR COUT
JMP :DONE
:OFF_SCR INC LINEIDX ;TODO - THIS IS WRONG!
LDA CHAR
CMP #CR_HIBIT
BNE :DONE
JSR CROUT
:DONE LDA CHAR
INC LINEIDX
:ENDSUB LDA CHAR
RTS
********************************
@ -640,7 +648,7 @@ ERASEBAR
JSR COUT ;WRITE TO SCREEN
INY ;MAKE PROGRESS
JMP :LOOP ;LOOP TO NEXT CHAR
:ENDLOOP SET0 OURCH ;RESET CURSON TO BEG OF LINE
:ENDLOOP SET0 OURCH ;RESET CURSOR TO BEG OF LINE
POPY
DO TRACE