Keyboard Microsoft BASIC - Revision history

Mr z: Protected "Keyboard Microsoft BASIC" ([edit=autoconfirmed] (indefinite) [move=autoconfirmed] (indefinite))

2010-12-04T08:50:22Z

Protected "Keyboard Microsoft BASIC" ([edit=autoconfirmed] (indefinite) [move=autoconfirmed] (indefinite))

Mr z at 08:50, 4 December 2010

2010-12-04T08:50:15Z

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Arnauld at 13:37, 1 July 2006

2006-07-01T13:37:42Z

Mr z at 17:58, 30 June 2006

2006-06-30T17:58:46Z

New page

<I>(this is a stub article. must upload photos of BASIC cart as well.)</I>

Microsoft ported a version of its ubiquitous BASIC to the Intellivision Keyboard Component. It reports itself as "Intellivision BASIC" with the following copyright: "Copyright Microsoft, Mattel 1980."

The version found on the Keyboard Component appears to be based off the same [http://en.wikipedia.org/wiki/Microsoft_BASIC 8K BASIC] that other late-70s and early 80s machines used. Similarities included the cryptic 2-character error codes associated with those versions of BASIC. The BASIC interpreter is a 6502-specific program that does not appear to make use of any Master Component functionality. The BASIC interpreter is 8K bytes in size, and resides at $E000 - $FFFF in the address map.

The BASIC interpreter supports the following keywords:

END PRINT SGN
FOR CONT INT
NEXT LIST ABS
DATA CLEAR VER
INPUT PRT FRE
DIM NEW POS
READ TAB( SQR
LET TO RND
GOTO FN LOG
RUN SPC( EXP
IF THEN COS
RESTORE NOT SIN
GOSUB STEP TAN
RETURN + ATN
REM - GETC
STOP * LEN
ON / STR$
PLOD # VAL
PSAV AND ASC
VLOD OR CHR$
VSAV > LEFT$
DEF = RIGHT$
SLOD < MID$

It reports the following error codes:

GO ??
NF NEXT without FOR
SN Syntax error
RG RETURN without GOSUB
OD Out of DATA. Attempted to READ beyond last DATA statement.
FC Illegal function call (e.g. arguments are out of range)
OV Numeric overflow
OM Out of memory
US ??
BS Bad array subscript
DD Attempt to re-DIM an array
/0 Division by 0
ID Illegal direct-mode instruction. Instruction legal only inside a program.
TM Type mismatch. (e.g. assigning a number to a string variable or vice versa)
LS Long string. Strings have a maximum length of 255(?) chars.
ST String operation is too complex
CN Can't continue
UF ??
TR ?? Tape read error?
TP ?? Tape error?

← Older revision	Revision as of 08:50, 4 December 2010
(No difference)

@@ Line 41: / Line 41: @@
   OV  Numeric overflow
   OM  Out of memory
-  US  ??
+  US  Undefined line number
   BS  Bad array subscript
   DD  Attempt to re-DIM an array
@@ Line 50: / Line 50: @@
   ST  String operation is too complex
   CN  Can't continue
-  UF  ??
+  UF  ?? Undefined user function?
   TR  ?? Tape read error?
   TP  ?? Tape error?