Dragon Notebook - Revision history

Tormod: /* ERROR MESSAGES AND CODES */ pre

2017-07-09T15:54:24Z

‎ERROR MESSAGES AND CODES: pre

Tormod: /* BAUD RATE CODE */ fixup

2017-07-09T15:53:24Z

‎BAUD RATE CODE: fixup

Tormod: /* HELPFUL ROUTINES */ pre and headers

2017-07-09T15:51:42Z

‎HELPFUL ROUTINES: pre and headers

Show changes

Tormod: /* PEEKs, POKES and EXECs */ pre

2017-07-09T15:38:53Z

‎PEEKs, POKES and EXECs: pre

Tormod: /* INTRODUCTION */

2017-07-09T15:33:36Z

‎INTRODUCTION

Tormod: /* DEBUGGING HINTS */ make headers

2017-07-09T15:32:02Z

‎DEBUGGING HINTS: make headers

Tormod: /* GRAPHIC MODES of the DRAGON and COCO */ pre

2017-07-09T15:28:49Z

‎GRAPHIC MODES of the DRAGON and COCO: pre

Tormod: /* SAM CONTROL BITS */

2017-07-09T15:26:56Z

‎SAM CONTROL BITS

Tormod: /* INPUT/OUTPUT ROUTINES */

2017-07-09T15:26:41Z

‎INPUT/OUTPUT ROUTINES

Tormod: /* BASIC INTERPRETER CODES */ pre

2017-07-09T15:26:06Z

‎BASIC INTERPRETER CODES: pre

@@ Line 2,241: / Line 2,241: @@
 == ERROR MESSAGES AND CODES ==
+<pre>
        NF      NEXT without FOR
        SN      Syntax error
@@ Line 2,296: / Line 2,295: @@
          SE      Set to non-fielded string (data)
          VF      Verification error
+</pre>
 [[Category:Documentation]] [[Category:Software]] [[Category:Development]]

@@ Line 769: / Line 769: @@
 DATA
 ,75,110,135,150,300,600,1200,1800,2400,3600,4800,7200,9600
-<pre>
+</pre>
 === DATA TROUBLE ===

@@ Line 45: / Line 45: @@
 == PEEKs, POKES and EXECs ==
+<pre>
 WAIT for Keyboard input
 DRAGON EXEC 34091 (COCO EXEC 44539)
@@ Line 241: / Line 241: @@
 & the Coco. If a disk drive  is installed then a 14 is returned
 for the Coco and a 12 for the Dragon.
 SOUND - OCTAVE
@@ Line 296: / Line 299: @@
 (b) SCALE PEEK(233)
 Returns scale number from 1 to 62
-CONTNUE after BREAK
+== Other ==
 PEEK(41)*256+PEEK(42)
@@ Line 347: / Line 353: @@
 CUMANA DOS POKES
-Addresses of the READ/WRITE routines in ROM.
+=== Addresses of the READ/WRITE routines in ROM. ===
+<pre>
 EB    Number of the active drive
 EE/F  Buffer address (for sector read/write)
@@ Line 365: / Line 372: @@
 E56D    Sector READ routine
 E643    Sector WRITE routine
+</pre>
 == HELPFUL ROUTINES ==

@@ Line 1: / Line 1: @@
 == INTRODUCTION ==
 This Notebook is dedicated to 6809 programmers past, present
@@ Line 43: / Line 42: @@
-Ray Smith,
+Ray Smith, THE EDITOR
 == PEEKs, POKES and EXECs ==

@@ Line 1,177: / Line 1,177: @@
 == DEBUGGING HINTS ==
+=== FC (Function Call) errors ===
 These usually occur in  the  GET,  PUT,  DRAW,  PLAY and LINE
@@ Line 1,199: / Line 1,198: @@
 the definition of the individual components.
-OD (Out of data) errors
+=== OD (Out of data) errors ===
 These occur as a rule when you:-
@@ Line 1,210: / Line 1,209: @@
 next item in the current Data statement.
-PAINT errors
+=== PAINT errors ===
 Paint errors can be catastrophic  in graphics, when the paint
@@ Line 1,227: / Line 1,226: @@
 in the outline somewhere.
-USR Routines
+=== USR Routines ===
 A well known bug in the ROM  of  the Dragon 32 means that the
@@ Line 1,237: / Line 1,236: @@
 circumvent this and will  ensure  the  program should  run on
 both machines.
+<pre>
 VS$=CHR$(PEEK(49052) + PEEK(49053)) 'TO TEST WHETHER
 DRAGON 32 OR 64
 IF VS$="64" THEN DEF USR1=30000 ELSE DEF USR01=30000
 where 30000 can be any address......
 and then later in the program...
 IF VS$="64" THEN X=USR1(A) ELSE X=USR01(A)
-BS Bad Subscript errors
+=== BS Bad Subscript errors ===
 These usually occur when the  subscripts  in an array are out
@@ Line 1,256: / Line 1,258: @@
 as the DIM count starts with zero.
-DD Attempt to redimension an array.
+=== DD Attempt to redimension an array. ===
 Be careful where you put the  DIM  statement in your program,
@@ Line 1,265: / Line 1,267: @@
 the beginning and the program does not regress.
-DS Direct statement
+=== DS Direct statement ===
 Can occur because there is a direct statement in a data file,
@@ Line 1,272: / Line 1,274: @@
 error.
-FM Bad file mode
+=== FM Bad file mode ===
 If you have both double and single drives you may be prone to
@@ Line 1,287: / Line 1,289: @@
 and there's nothing you can do about it!
-NE File non-existent
+=== NE File non-existent ===
 The Computer can't find the file you want. If you've got more
@@ Line 1,300: / Line 1,302: @@
 RENAME commands and omit the extension.
-NF NEXT without FOR
+=== NF NEXT without FOR ===
 This occurs when the command NEXT is used without a matching
@@ Line 1,311: / Line 1,313: @@
 forgotten!
-TF Too many open
+=== TF Too many open ===
 Files that is. One of the easiest errors to fall into, when
@@ Line 1,324: / Line 1,326: @@
 command was not included.
-UL Undefined line
+=== UL Undefined line ===
 Occurs when a GOTO or a GOSUB is used with a line number
@@ Line 1,337: / Line 1,339: @@
 when reloaded it will probably run.
-DATA
+=== DATA ===
 Most mistakes occur when you type in programs from magazines
@@ Line 1,361: / Line 1,363: @@
 and replaced it with gobbledegook. It used to drive me mad,
 but it taught me to never leave disks in the drive.
 == GRAPHIC MODES of the DRAGON and COCO ==

@@ Line 1,364: / Line 1,364: @@
 == GRAPHIC MODES of the DRAGON and COCO ==
 NOTE - Modes 3 to 9 are not supported by Basic, but can be
 poked and used in your programs. One such program was called
 'Semigraphics 24' and was written by A C Daniel, it appeared
 in Dragon User magazine August 1985.
+<pre>
 MODE 1 Standard text screen 32 x 16 bytes (512)
@@ Line 1,409: / Line 1,407: @@
         A=PEEK65314):POKE65314,(A AND 7)
         POKE65477,1:POKE65475,1:POKE65472,0
+</pre>
 NOTE - In the Semigraphic 8 colour modes, the colours are
 set with the MSB which ALWAYS has bit 7 set (1) and the rest
 of the MSB (ie bits 6,5 &4) are set for the colours as
 follows:
 GREEN        001 YELLOW
 BLUE         011 RED
@@ Line 1,456: / Line 1,455: @@
 MODE14 is PMODE4 - 6144 bytes - 2 colour
+</pre>
 == BIBLIOGRAPHY ==

@@ Line 2,155: / Line 2,155: @@
 == SAM CONTROL BITS ==
+<pre>
 /7 FFC0/5  VDG Control Registers for 6883 SAM
                  Contains 3 pairs of addresses (V0-V2), and
@@ Line 2,190: / Line 2,189: @@
 /7 FFD8/9  Control of Bit R1
                  R0=0, R1=0 (slow mode defa
+</pre>
 == MPU VECTORS ==

@@ Line 2,106: / Line 2,106: @@
 == INPUT/OUTPUT ROUTINES ==
 These refer to DRAGONDOS.
+<pre>
    FF00    Bits 0 to 6 Keyboard row input
                  Bit 7 koystick comparator input
@@ Line 2,154: / Line 2,152: @@
 - not used
 - Cartridge Interrupt Flag
+</pre>
 == SAM CONTROL BITS ==

@@ Line 1,917: / Line 1,917: @@
 == BASIC INTERPRETER CODES ==
+<pre>
    8000    Hardware initialisation
    8003    Software initialisation
@@ Line 1,936: / Line 1,935: @@
    802D    Sends a byte to another computer
    8030    Select Baud rate of communications line
+</pre>
 From here on the Coco equivalents are given in brackets and
 only a few Hex addresses will be given
+<pre>
   (44102)  SYSERR: Generates appropriate action for
                  Error code in B Reg
@@ Line 1,979: / Line 1,978: @@
   (46323)  ASSIGN-8-BIT:assigns value in B register to
                  a numeric variable
   (46481)  GARBAGE COLLECT: forces a controlled garbage
                  collection of string space
@@ Line 2,045: / Line 2,041: @@
   (43189)  RESET LRG PIXEL:as above but B Reg ignored,
                  Pixel reset to Black
   (43225)  CALC PIXEL POS:on entry the top of stack
                  must contain Lo-res vertical co-ordinate,
@@ Line 2,085: / Line 2,078: @@
   (43050)  BYTE OUT: writes byte in A Reg to tape
    BE6A    WRTLDR:turns cassette on and writes a leader
+</pre>
 THE FOLLOWING ARE DRAGONDOS ROUTINES
+<pre>
    C00E    LENFIL: Report file length
    C010    CLOSAL: Close all files
@@ Line 2,110: / Line 2,103: @@
                  number of milliseconds to wait
    DC0A    BOOT DSK: boots an OS off disk in DEFD drive
 == INPUT/OUTPUT ROUTINES ==