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1986-10-12
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CHALK
AN ELECTRONIC SPREAD SHEET
BY PAUL M WILSON
TABLE OF CONTENTS
1. OVERVIEW............................................... 2
2. GET STARTED............................................ 2
3. BOARD COMPONENTS....................................... 4
4. HELP................................................... 5
5. COMMANDS............................................... 6
6. STANDARDS.............................................. 8
7. BOARD DESIGN HINTS..................................... 8
8. DEFINE SYSTEM.......................................... 8
9. GLOSSARY............................................... 9
10. MESSAGES...............................................10
11. FILE STRUCTURE.........................................11
12. MAKE MONEY WITH CHALK..................................12
13. EXAMPLES...............................................13
1
CHALK AN ELECTRONIC SPREADSHEET
1. OVERVIEW:
CHALK IS AN ELECTRONIC SPREADSHEET. IT ALLOWS YOU TO BUILD AND MAINTAIN A
BOARD OF TABULAR DATA. SOME POSSIBLE USES ARE CASH FLOW PROJECTION, STUDENT
GRADE BOOK, PHONE BOOK, INVENTORY MAINTENANCE, CHECK BOOK MAINTENANCE, AND SALES
HISTORY.
A BOARD IS A TABLE HAVING ROWS AND COLUMNS. THE BOARD HAS A TITLE. EACH ROW
AND EACH COLUMN MAY HAVE A TITLE. THE INTERSECTION OF A ROW AND A COLUMN IS
CALLED A CELL. CELLS ARE THE BASIC BUILDING BLOCK OF THE BOARD. EACH CELL
CONTAINS AN AMOUNT AND A FORMULA. NORMALLY AMOUNTS ARE DISPLAYED BUT YOU
CAN ALTERNATLY SEE FORMULAS.
YOU CONTROL ALL TITLES AND THE CONTENTS OF ALL CELLS. YOU CAN SAVE AND
RETRIEVE THE CONTENTS OF ANY BOARD AS A FILE. SELECTED AMOUNTS OF EXISTING
BOARDS CAN BE MERGED WITH THE CURRENT BOARD. ROWS AND COLUMNS CAN BE ADDED
OR DELETED. SELECTED PORTIONS OF THE BOARD CAN BE SORTED BY ROW TITLE OR
ROW AMOUNT IN ASCENDING OR DESCENDING SEQUENCE. THE BOARD CAN BE PRINTED.
2. GET STARTED:
THIS SECTION EXPLAINS THE STEPS NECESSARY TO START USING A BOARD. IT ASSUMES
THAT THE SYSTEM HAS BEEN DEFINED.
STEP PROMPT============= ENTER=============== EXPLAINATION================ NEXT
1 SYSTEM PROMPT CHALK LOGON TO CHALK 2
2 AUTHOR'S STATEMENT PRESS RETURN 3
3 AUTHOR'S STATEMENT PRESS RETURN 4
4 ENTER BOARD NAME OR EXISTING BOARD FILE LOAD BOARD INTO MEMORY 6
NEW NAME
WARNING BOARD NOT FOUND 4
NEW INITIALIZE NEW BOARD IN MEMORY 5
Q EXIT CHALK
5 ENTER EXPECTED ROWS,
EXPECTED COLS ##,## BUILD EMPTY BOARD IN MEMORY 6
IF BOARD WON'T FIT SHOW
##### BYTES MORE MEMORY
REQUIRED. TRY SMALLER ARRAY 5
6 BOARD FORMAT THE BOARD IS NOW DISPLAYED.
== ===================== ==================== =================================
2
CHALK AN ELECTRONIC SPREADSHEET
2.1 EXAMPLE OF LOGON FOR A NEW BOARD:
NOTE EXAMPLE SCREEN SIZE IS 64 COLUMNS.
2.1.1 FIRST LOGON SCREEN:
================================================================
|CHALK REVISION: 2.10 COPYRIGHT 1983 BY PAUL M WILSON |
|PRESS RETURN |
|NOT RESPONSIBLE FOR CONSEQUENTIAL DAMAGES |
|AUTHOR'S STATEMENT |
| |
================================================================
2.1.2 SECOND LOGON SCREEN:
================================================================
|CHALK REVISION: 2.10 COPYRIGHT 1983 BY PAUL M WILSON |
|PRESS RETURN |
| |
|AUTHOR'S STATEMENT CONTINUED |
| |
================================================================
2.1.3 WHAT BOARD DO YOU WANT:
================================================================
|CHALK REVISION: 2.10 COPYRIGHT 1983 BY PAUL M WILSON |
|ENTER BOARD NAME OR NEW<NEW> |
| |
================================================================
2.1.4 SPECIFY BOARD SIZE:
================================================================
|CHALK REVISION: 2.10 COPYRIGHT 1983 BY PAUL M WILSON |
|ENTER EXPECTED ROWS, EXPECTED COLS <3,4> |
|CURRENT ROWS: 3 COLS: 4 |
|MAX ROWS: 22 COLS:23 |
| |
================================================================
AN EMPTY BOARD OF 3 ROWS BY 4 COLUMNS WILL BE CONSTRUCTED. NOTE THAT FOR THIS
EXAMPLE THE BOARD COULD EVENTUALLY GROW TO 22 ROWS BY 23 COLUMNS. IT IS
IMPORTANT THAT YOU ESTIMATE AS ACCURATLY AS POSSIBLE THE DIMENSIONS OF YOUR
BOARD. EACH TIME YOU RUN CHALK AND SPECIFY A NEW OR EXISTING BOARD, THE
MAXIMUM BOARD SIZE WILL BE COMPUTED. CHALK ATTEMPTS TO ALLOCATE AN EQUAL
NUMBER OF ROWS AND COLUMNS BEYOND THE CURRENT BOARD SIZE. THAT IS A ROW WILL
BE ALLOCATED AND THEN A COLUMN REPETITIVELY UNTIL ALL AVAILABLE MEMORY IS
USED. THUS SHOULD YOU ADD ROWS BEYOND THE INITIAL 3 AND THEN SAVE THE BOARD,
THE NEXT TIME YOU RUN CHALK WITH THIS BOARD, MAX ROWS WILL PROBABLY BE LARGER
AND MAX COLUMNS WILL BE SMALLER.
3
CHALK AN ELECTRONIC SPREADSHEET
3. BOARD COMPONENTS:
A BOARD IS A TABLE HAVING ROWS AND COLUMNS. THE BOARD HAS A TITLE. EACH ROW
AND EACH COLUMN MAY HAVE A TITLE. THE INTERSECTION OF A ROW AND A COLUMN IS
CALLED A CELL. CELLS ARE THE BASIC BUILDING BLOCK OF THE BOARD. EACH CELL
CONTAINS AN AMOUNT AND A FORMULA. NORMALLY AMOUNTS ARE DISPLAYED BUT YOU
CAN ALTERNATLY SEE FORMULAS.
YOU CONTROL ALL TITLES AND THE CONTENTS OF ALL CELLS. YOU CAN SAVE AND
RETRIEVE THE CONTENTS OF ANY BOARD AS A FILE. SELECTED AMOUNTS OF EXISTING
BOARDS CAN BE MERGED WITH THE CURRENT BOARD. ROWS AND COLUMNS CAN BE ADDED
OR DELETED. SELECTED PORTIONS OF THE BOARD CAN BE SORTED BY ROW TITLE OR
ROW AMOUNT IN ASCENDING OR DESCENDING SEQUENCE.
3.1 BOARD COMMUNICATION:
THE FIRST THREE LINES OF THE CRT ARE USED TO COMMUNICATE WITH THE BOARD.
3.1.1 LINE 1. HEADER INFORMATION:
LINE ONE DISPLAYS THE LOCATION OF THE CURRENT CELL (WHICH IS HIGHLIGHTED
ON THE DISPLAY), THE BOARD FILE NAME, COPYRIGHT, AUTOMATIC CURSOR
DIRECTION, AND THE FORMULA OF THE CURRENT CELL. IF CALCULATIONS MUST BE
PERFORMED TO UPDATE THE BOARD, A WARNING IS DISPLAYED ON THE LINE.
3.1.2 LINE 2. DATA ENTRY PROMPT:
LINE TWO DISPLAYS THE CURRENT ROW AND COLUMN TITLES. COMMANDS, AMOUNTS
AND FORMULAS ARE INPUT, THE CURSOR ADVANCES AND THE BOARD IS REFRESHED.
COMMAND PROMPTS ARE ALSO DISPLAYED ON THIS LINE.
3.1.3 LINE 3. WARNINGS AND MESSAGES PERTINENT TO THE LAST DATA ENTRY.
3.2 BOARD DATA:
3.2.1 LINE 4. BOARD TITLE AND DATE.
3.2.2 LINE 5. COLUMN IDENTIFIERS.
3.2.3 LINE 6. COLUMN TITLES.
3.2.4 LINE 7 THRU N. ROW IDENTIFIER, ROW TITLE, AMOUNTS OR FORMULAS.
NEW BOARD:
===============================================================
1|ROW: 1 COL:AA CHALK BY:PAUL M WILSON:CURSOR DOWN:A |
2| | |#######.## |
3| |
4|BOARD:NEW NEW |
5| AA AB AC AD |
6| |
7| 1 0.00 0.00 0.00 0.00 |
8| 2 0.00 0.00 0.00 0.00 |
9| 3 0.00 0.00 0.00 0.00 |
===============================================================
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4. HELP:
AFTER A BOARD HAS BEEN CHOSEN, THE HELP SCREENS CAN BE VIEWED AT ANY TIME
BY ENTERING '?'.
THE FIRST HELP SCREEN DISPLAYS THE COMMANDS AND EXPLAINS CURSOR MOTION.
================================================================
|C CALCULATE BOARD |T TITLE BOARD |AR ADD ROW |
|S SAVE BOARD ON DISK|TR TITLE ROW |DR DELETE ROW |
|DATE DATE BOARD |TC TITLE COL |AC ADD COL |
|HS HARDCOPY SCREEN |H HARDCOPY |DC DELETE COL |
|V VIEW ON/OFF |B VIEW BOARD |F VIEW FORMULA |
|Q QUIT |R RIGHT |D DOWN |
| |AB ADD BOARD |SORT SORT |
| |
|M MOVE CURSOR FOLLOWED BY ANY COMBINATION OF: |
| A COL 1 |W ROW 1 |R RIGHT A SCREEN |
| S LEFT A COL |E UP A ROW |V DOWN A SCREEN |
| D RIGHT A COL|X DOWN A ROW| |
| F LAST COL |Z LAST ROW |
| Q COL 1 ROW 1|RRCC WHERE RR IS ROW AND CC IS COL |
| |
|? HELP |
| |
================================================================
THE SECOND HELP SCREEN DESCRIBES FORMULA RULES.
=====================================================================
|FORMULA DESCRIPTION |FORMULA DESCRIPTION |
|FA ACTUAL |FB BLANK |
|Frr+ss ROW rr + ROW ss |Fcc+dd COL cc + COL dd |
|Frr-ss ROW rr - ROW ss |Fcc-dd COL cc - COL dd |
|Frr*ss ROW rr * ROW ss |Fcc*dd COL cc * COL dd |
|Frr/ss ROW rr / ROW ss |Fcc/dd COL cc / COL dd |
|F###%rr PERCENT OF ROW rr |F###%cc PERCENT OF COL cc |
|Frr&ss ROW rr THRU ROW ss SUM |Fcc&dd COL cc THRU COL dd SUM |
|Ftt>uu MOVE ROW tt COL cc |
| |
|NOTE: |
|rr AND ss MUST BE LESS THAN THE CURRENT ROW. |
|cc AND dd MUST BE LESS THAN THE CURRENT COL. |
|tt MAY BE ANY ROW. uu MAY BE ANY COL LESS THAN THE CURRENT COL. |
|uu MAY EQUAL CUR COL IF CELL ttuu HAS BEEN CALCULATED. |
| |
|CALCULATIONS FOR EACH CELL ARE MADE IN COL FASHION FROM ROW 1 COL 1|
|TO THE LAST ROW OF COL 1 AND THEN ADVANCING TO THE NEXT COL. |
|'C' IN THE TOP LINE AFTER FREE INDICATES CALCULATIONS ARE NEEDED. |
|CALCULATIONS ARE MADE BY ENTERING 'C'. |
| |
=====================================================================
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5. COMMANDS:
COMMANDS CAN BE VIEWED BY ENTERING '?'.
COMMAND DESCRIPTION EXPLAINATION
_______ __________________ _______________________________________________
AB ADD BOARD ADDS AMOUNTS FROM A SPECIFIED ROW AND COL RANGE
OF A SPECIFIED BOARD TO THE CURRENT BOARD USING
THE CURRENT CELL AS THE UPPER LEFT HAND CORNER.
AC ADD COL INSERTS A NEW COL TO THE IMMEDIATE RIGHT OF THE
CURRENT COL. THE NEW COL WILL HAVE ZERO FOR ALL
VALUES AND WILL HAVE THE SAME FORMULA CHARAC-
TERISTICS AS THE CURRENT COL. FORMULAS ARE
AUTOMATICALLY ADJUSTED, CALCULATIONS ARE
PERFORMED AND THE SCREEN IS REFRESHED. THE
CURSOR IS PLACED IN THE NEW COL.
AR ADD ROW INSERTS A NEW ROW IMMEDIATLY BELOW THE CURRENT
ROW. THE NEW ROW WILL HAVE ZEROS FOR ALL VALUES
BUT IT WILL HAVE THE SAME FORMULA CHARACTER-
ISTICS AS THE CURRENT ROW. ALL FORMULAS ARE
AUTOMATICALLY ADJUSTED, CALCULATIONS ARE
PERFORMED AND THE SCREEN IS REFRESHED. THE
CURSOR IS PLACED IN THE NEW ROW.
B VIEW BOARD REFRESHES THE SCREEN WITH THE AMOUNTS CENTERED
AROUND THE CURRENT CELL. SETS THE VIEW FORMULA
TOGGLE OFF.
C CALCULATE BOARD COMPUTES CURRENT AMOUNTS FOR THE BOARD.
REFRESHES THE SCREEN WITH AMOUNTS. SETS VIEW
FORMULA TOGGLE OFF. SETS VIEW BOARD TOGGLE ON.
D DOWN TOGGLE CONTROLS THE DIRECTION OF THE AUTOMATIC
CURSOR AFTER ENTRY OF DATA. IF IN FORMULA MODE
THE NEXT CELL WILL BE IMMEDIATLY DOWN. IF IN
AMOUNT MODE THE NEXT CELL WILL BE THE NEXT CELL
DOWN WHICH CAN ACCEPT AN AMOUNT.
DATE DATE BOARD UPDATES THE DATE ASSOCIATED WITH THE BOARD.
DC DELETE COL DELETES THE CURRENT COL. ADJUSTS ALL FORMULAS.
COMPUTES CURRENT AMOUNTS FOR THE BOARD. COLUMNS
REFERENCED IN A FORMULA CAN'T BE DELETED. THE
CURSOR IS PLACED IN THE PRIOR COLUMN.
DR DELETE ROW DELETES THE CURRENT ROW. ADJUSTS ALL FORMULAS.
COMPUTES CURRENT AMOUNTS FOR THE BOARD. ROWS
REFERENCED IN A FORMULA CAN'T BE DELETED. THE
CURSOR IS PLACED IN THE PRIOR ROW.
6
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COMMAND DESCRIPTION EXPLAINATION
------- ------------------ -----------------------------------------------
F VIEW FORMULA REFRESHES THE SCREEN WITH THE FORMULAS CENTERED
AROUND THE CURRENT CELL. SETS THE VIEW AMOUNTS
TOGGLE OFF.
H HARDCOPY PRINT A HARDCOPY OF THE BOARD. DATA PRINTED
DEPEND ON WHETHER THE 'B' OR 'F' TOGGLE IS SET.
HS HARDCOPY SCREEN PRINT A HARDCOPY OF THE CURRENT SCREEN ONLY.
Q QUIT QUIT. IF DATA HAS BEEN CHANGED, TRIES TO SAVE
THE BOARD.
R RIGHT TOGGLE CONTROLS THE DIRECTION OF THE AUTOMATIC
CURSOR AFTER ENTRY OF DATA. IN FORMULA MODE
THE NEXT CELL WILL BE IMMEDIATLY TO THE RIGHT.
IN AMOUNT MODE THE NEXT CELL WILL BE THE NEXT
CELL TO THE RIGHT WHICH CAN ACCEPT AN AMOUNT.
S SAVE BOARD ON DISK CALCULATES AMOUNTS FOR THE BOARD. SETS VIEW ON.
REFRESHES THE SCREEN. ASKS FOR THE NAME TO SAVE
THE BOARD AS. IF THE BOARD NAME ALREADY EXISTS
GIVES YOU A CHANCE TO CHANGE YOUR MIND.
SORT SORT ANY VALID RANGE OF ROWS MAY BE SORTED IN
ASCENDING OR DESCENDING SEQUENCE BY EITHER ROW
TITLE OR AMOUNTS OF THE CURRENT COL.
FORMULA PATTERNS FOR ALL ROWS MUST MATCH.
T TITLE BOARD TITLE BOARD.
TC TITLE COL TITLE THE CURRENT COL. THE CURSOR AUTOMATICALLY
ADVANCES TO THE NEXT COL FOR ENTRY OF A TITLE
IN THAT COL TOO. PRESS RETURN WHEN YOU ARE
DONE ENTERING COL TITLES.
TR TITLE ROW TITLE THE CURRENT ROW. THE CURSOR AUTOMATICALLY
ADVANCES TO THE NEXT ROW FOR ENTRY OF A TITLE
IN THAT ROW TOO. PRESS RETURN WHEN YOU ARE
DONE ENTERING ROW TITLES.
V VIEW ON/OFF TOGGLE TO SUPPRESS VIEWING OF THE ENTIRE BOARD.
USED TO SPEED ENTRY OF DATA AND FORMULAS.
7
CHALK AN ELECTRONIC SPREADSHEET
6. STANDARDS:
DATA ENTRY. THE REPLY TO ANY PROMPT MUST TERMINATE WITH A RETURN.
Q WILL GENERALLY EXIT A STEP.
RETURN WILL LEAVE DATA UNCHANGED.
AMOUNTS MUST HAVE ZERO OR TWO PLACES TO THE RIGHT OF THE DECIMAL.
MINUS SIGNS ARE LEADING.
7. DEFINE THE SYSTEM:
SYSTEM REQUIREMENTS:
ANY CP/M SYSTEM WITH AT LEAST 48K.
CRT ABLE TO:
HOME THE CURSOR.
CLEAR SCREEN FROM CURSOR TO END OF SCREEN.
TOGGLE HIGHLIGHTING ON AND OFF (HIGHLY DESIRABLE).
RING BELL.
PRINTER (HIGHLY DESIRABLE).
7.1 MAKE A COPY OF THE CHALK DISKETTE AND SAVE IT! AS YOU WILL PROBABLE
WANT TO GIVE CHALK TO FRIENDS (HUNDREDS I HOPE!). PLEASE DO IT NOW.
7.2 CHALK ASSUMES THE CURRENT ACTIVE DRIVE CONTAINS THE FOLLOWING FILES:
1. CHALK.COM
2. CHALK1.OVL
3. CHALK2.OVL
4. CHALK3.OVL
5. CHALK.CTL
6. CHALKNEW.COM
THESE ARE THE ONLY FILES THAT ARE ABSOLUTELY REQUIRED TO EXECUTE CHALK.
CHALKNEW.COM IS ONLY NEEDED WHEN RECONFIGURING THE SYSTEM.
7.3 TAILOR CHALK TO YOUR SYSTEM CONFIGURATION:
EXECUTE CHALKNEW TO MODIFY THE FOLLOWING FIELDS IN CRT.CTL:
1. SCREEN DEPTH.
2. SCREEN WIDTH.
3. PRINTER PAGE LINES.
4. PRINTER PAGE WIDTH.
5. HOME. THIS IS THE COMMAND TO HOME THE CURSOR ONLY. DON'T USE THE
COMMAND TO HOME AND CLEAR.
6. CLEAR FROM CURSOR TO END OF SCREEN.
7. BRIGHT.
8. DIM.
9. BELL.
10. PRINTER FORM FEED.
NOTE THAT ITEMS 5 THRU 10 EXPECT THE DECIMAL VALUES OF THE ASCII CHARACTER
CODES NEEDED TO FORM THAT COMMAND. IF MORE THAN ONE ASCII CHARACTER IS
NEEDED, THEY MUST BE SEPARATED BY COMMAS. FOR EXAMPLE THE HAZLETINE 1500
COMMAND TO HOME THE CURSOR IS '126,18'. SEE THE CONTROL FILE IF YOU NEED
TO KNOW MORE.
8
CHALK AN ELECTRONIC SPREADSHEET
8. BOARD DESIGN HINTS:
LOOK FOR AN EXISTING BOARD SIMILAR TO THE BOARD YOU WANT AND COPY IT.
IF YOU CAN'T FIND AN EXISTING BOARD TO COPY THEN DO THE FOLLOWING.
8.1 ESTIMATE THE NUMBER OF ROWS AND COLUMNS YOU WILL NEED. THIS IS
IMPORTANT AS IT IS TIME CONSUMING TO ADD OR DELETE ROWS AND COLUMNS.
8.2 TITLE THE BOARD.
8.3 TITLE ROWS.
8.4 TITLE COLUMNS.
8.5 DEFINE FORMULAS.
IF YOU ARE SUMMING A SERIES OF CELLS IT IS HELPFUL TO MAKE THE FIRST CELL
OF THE SERIES BLANK. SINCE BLANK CELLS ALWAYS CONTAIN A VALUE OF ZERO,
THIS DOESN'T AFFECT THE CALCULATIONS YET MAKES IT MUCH EASIER TO ADD OR
DELETE THE FIRST CELL CONTAINING DATA.
REMEMBER THAT CALCULATIONS ARE ALWAYS PERFORMED FROM TOP TO BOTTOM LEFT TO
RIGHT.
8.6 ENTER INITIAL AMOUNTS.
8.7 BE SURE TO SAVE THE BOARD.
9
CHALK AN ELECTRONIC SPREADSHEET
9. GLOSSARY:
AMOUNT:
ANY QUANTITY IN THE RANGE +/- 99999999.99.
BOARD:
THE FILE YOU ARE CURRENTLY WORKING WITH. MAY HAVE A NAME OF UP TO
8 CHARACTERS. THE BOARD MAY ALSO BE GIVEN A TITLE. THE CURRENT BOARD
MAY BE SAVED AS MANY TIMES AS DESIRED FOR ANY CHALK SESSION.
CELL:
THE BASIC BUILDING BLOCKS OF THE BOARD. THE CURRENT CELL IS
HIGHLIGHTED. EACH CELL CONTAINS AN AMOUNT AND A FORMULA. UNLESS YOU
ARE IN FORMULA MODE YOU WILL SEE AN ENTERED AMOUNT OR A CALCULATED
AMOUNT IN EACH CELL. CELLS ARE ADDRESSED BY ROW AND COLUMN.
COLUMN:
EACH CELL OCCUPIES A COLUMN ADDRESS. COLUMNS ADDRESSES ARE 2
ALPHABETIC CHARACTERS.
FORMULA:
THE ALGORITHM USED TO DISPLAY THE COMPUTED AMOUNT FOR ANY CELL. SEE
THE HELP SCREENS FOR MORE ABOUT FORMULAE.
HARD COPY:
THE PRINTED OUTPUT AVAILABLE FOR ANY BOARD OR SCREEN.
ROW:
EACH CELL OCCUPIES A ROW ADDRESS.
TITLE:
YOU CAN TITLE A BOARD.
YOU CAN ALSO TITLE EACH ROW AND EACH COLUMN.
10. MESSAGES:
MESSAGES APPEAR ON THE THIRD LINE OF THE SCREEN. THEY DESCRIBE THE
RESULTS OF THE LAST ENTERED DATA. IF AN ERROR HAS BEEN MADE THE BELL
WILL RING.
10
CHALK AN ELECTRONIC SPREADSHEET
11. FILE STRUCTURE:
ALL DATA FILES END WITH THE 3 CHARACTERS 'BRD'.
ALL DOCUMENTATION FILES END WITH THE 3 CHARACTERS 'DOC'.
ALL EXAMPLE BOARDS START WITH THE THREE CHARACTERS 'CHK'.
FIVE FILES ARE REQUIRED ON THE SYSTEM AND THEY MUST BE ON THE CURRENT
ACTIVE DRIVE. THEY ARE:
1. CHALK.COM
2. CHALK1.OVL
3. CHALK2.OVL
4. CHALK3.OVL
5. CHALK.CTL
THE SYSTEM DOCUMENTATION FILE IS CHALK.DOC.
THE EXAMPLE DOCUMENTATION FILE IS CHALKEX.DOC
CHALKA2B.SUB IS A SUBMIT FILE TO PIP ALL CHALK FILES TO DRIVE B.
CHALKNEW.COM IS USED TO DEFINE THE SYSTEM.
11.1 CONTROL FILE:
THE CONTROL FILE IS NAMED CHALK.CTL.
IT CONSISTS OF LINES OF NUMBERS SEPARATED BY COMMAS.
EACH LINE IS TERMINATED BY 255.
FOR EXAMPLE THE LINE FOR A BELL IS USUALLY:
7,255<CRLF>
LINE DEFAULT
============================================= =================
REGISTRATION 0,255<CRLF>
ROW TITLE LENGTH 16,255<CRLF>
COLUMN TITLE LENGTH 10,255<CRLF>
SCREEN DEPTH 24,255<CRLF>
SCREEN WIDTH 80,255<CRLF>
PRINTER PAGE LINES 66,255<CRLF>
PRINTER PAGE WIDTH 132,255<CRLF>
HOME 126,18,255<CRLF>
CLEAR FROM CURSOR TO END OF SCREEN 126,24,255<CRLF>
BRIGHT 126,31,255<CRLF>
DIM 126,25,255<CRLF>
BELL 7,255<CRLF>
PRINTER FORM FEED 12,255<CRLF>
LAST LINE OF FILE END<CRLF>
CAUTION SHOULD BE USED IN MODIFYING THESE PARAMETERS. MODIFICATION
OF TITLE LENGTH PARAMETERS MAY CAUSE PREVIOUS BOARDS TO BE
PROCESSED INCORRECTLY. DEFAULT VALUES ARE FOR A HAZLETINE 1500 CRT.
YOU MAY HAVE TO CHANGE HOME, CLEAR, BRIGHT AND DIM FOR YOUR CRT.
IF YOU DON'T HAVE BRIGHT AND DIM OR THE EQUIVALENT ON YOUR CRT, THEN
USE 0,255<CRLF> FOR THOSE PARAMETERS.
11
CHALK AN ELECTRONIC SPREADSHEET
11.2 DATA FILE:
ALL BOARDS HAVE A TYPE OF BRD. SAVING AN EXISTING BOARD CAUSES THE
OLD BOARD TYPE TO BECOME BAK.
BOARD TITLE
DATE AS MMDDYY
MAX ROW,MAX COL
ROW TITLE 1
...........
ROW TITLE N
COLUMN TITLE 1
..............
COLUMN TITLE N
CELL DATA ARRANGED ROW MAJOR AND COLUMN MINOR. EACH CELL IS ON A LINE.
A CELL CONTAINS THE FOLLOWING FIELDS SEPARATED BY COMMAS:
VALUE
FORMULA TYPE
FORMULA ARGUMENT 1
FORMULA ARGUMENT 2
11.3 SUBMIT FILE: CHALKA2B.SUB
PIP
B:=CHALK.COM[OV]
B:=CHALK1.OVL[OV]
B:=CHALK2.OVL[OV]
B:=CHALK3.OVL[OV]
B:=CHALK.CTL
B:=CHALK.DOC
B:=CHALKEX.DOC
B:=CHALKA2B.SUB
B:=CHKCASH.BRD
B:=CHKCLASS.BRD
B:=CHKMETER.BRD
B:=CHKPHONE.BRD
B:=CHKSALES.BRD
B:=CHKSIMP.BRD
B:=CHALKUSR.DOC
12. DISTRIBUTE CHALK TO YOUR FRIENDS:
I REALLY WANT YOU TO DISTRIBUTE CHALK TO YOUR FRIENDS. YOU MIGHT MAKE A
FEW BUCKS ON IT. SUBMIT CHALKA2B. CHALK FILES AND DOCUMENTATION WILL BE
COPIED FROM DRIVE A TO DRIVE B.
FEEL FREE TO ADD YOUR COMMENTS TO CHALKUSR.DOC, BUT PLEASE DON'T CHANGE
ANYTHING ELSE. REMEMBER THE NEXT GUY MIGHT NEED WHAT YOU CHANGE.
13. EXAMPLES:
SEE CHALKEX.DOC.
102083================== END CHALK.DOC =======================================
12
