Attribute finder



This program will be of use to anyone investigating a BASIC

program when they only have a black and white television

available. It may also be useful to anyone who has colour

blindness. The BASIC program under investigation is stopped

with the Break key and then RUN 9040 is entered [which

promptly obliterates any attributes which were on the

screen. Better use GO TO 9040 instead...]

   Immediately the global attributes are displayed - the

BORDER colour, the default PAPER colour, the default INK

colour and BRIGHT/normal mode - together with the attribute

number that was set by the last PRINT statement before the

break.

   Then the user is prompted for a row and column co-ordi-

nates until '33' is entered, which will stop the program.

   The Attribute finder program itself obtains the global

attributes by PEEKing three locations in the Spectrum

workspace. This is done in line 9041. Local attributes are

picked up using ATTR(r1,c1) in line 9048. The attribute

number, held in N, is broken up into its component parts

by the subroutine starting at line 9050. Notice the use of

computed GO SUBs in lines 9052 and 9053 which pick up the

names of the colours.