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PROCEDURE example ON ALL BUT VIC20 CLS ' ****************************************************************** ' ******** destination: signed byte ******************************** ' ****************************************************************** DIM sb AS SIGNED BYTE ' source underflow -> destination underflow ' ' -42 = 11010110 -> 11010110 -> -42 sb = -42 PRINT "signed byte(-42) = "; sb; " (exp ";"-42";" )" ' source overflow [with unsigned byte] -> destination approximation ' ' 200 = 11001000 -> 01001000 -> +72 sb = 200 PRINT "signed byte(200) = "; sb; " (exp ";"72";" )" ' source overflow [with signed word] -> destination approximation ' ' -500 = 1111111000001100 -> 000111110100 -> 11110100 -> -116 sb = -500 PRINT "signed byte(-500) = "; sb; " (exp ";"-116";" )" ' source overflow [with unsigned word] -> destination approximation ' ' 20000 = 0100111000100000 -> 00100000 -> +32 sb = 20000 PRINT "signed byte(20000) = "; sb; " (exp ";"32";" )" ' source overflow [with signed dword] -> destination approximation ' ' -100500 = 11111111111111100111011101101100 -> 00011000100010010100 -> 10010100 sb = -100500 PRINT "signed byte(-100500) = "; sb; " (exp ";"-20";" )" ' source overflow [with unsigned dword] -> destination approximation sb = 10020000 PRINT "signed byte(10020000) = "; sb; " (exp ";"32";" )" ' ****************************************************************** ' ****************************************************************** ' ****************************************************************** WAIT KEY RELEASE : PRINT ' ****************************************************************** ' ******** destination: unsigned byte ****************************** ' ****************************************************************** DIM b AS BYTE ' source underflow -> destination underflow ' ' 42 = 11010110 -> 11010110 -> 42 b = 42 PRINT "byte(42) = "; b; " (exp ";"42";" )" ' source overflow [with unsigned byte] -> destination unsigned ' ' -42 = 11010110 -> 01001000 -> +42 b = -42 PRINT "byte(-42) = "; b; " (exp ";"42";" )" ' source overflow [with signed word] -> destination approximation ' ' -500 = 1111111000001100 -> 000111110100 -> 11110100 -> -116 b = -500 PRINT "byte(-500) = "; b; " (exp ";"12";" )" ' source overflow [with unsigned word] -> destination approximation ' ' 20000 = 0100111000100000 -> 00100000 -> +32 b = 20000 PRINT "byte(20000) = "; b; " (exp ";"32";" )" ' source overflow [with signed dword] -> destination approximation ' ' -100500 = 11111111111111100111011101101100 -> 00011000100010010100 -> 10010100 b = -100500 PRINT "byte(-100500) = "; b; " (exp ";"148";" )" ' source overflow [with unsigned dword] -> destination approximation b = 10020000 PRINT "byte(10020000) = "; b; " (exp ";"160";" )" ' ****************************************************************** ' ****************************************************************** ' ****************************************************************** WAIT KEY RELEASE : PRINT ' **************************************************************** ' ******** destination: signed word ****************************** ' **************************************************************** DIM sw AS SIGNED WORD ' source underflow -> destination underflow ' ' 42 = 11010110 -> 11010110 -> 42 sw = 42 PRINT "signed word(42) = "; sw; " (exp ";"42";" )" ' source underflow [with unsigned byte] -> destination underflow ' ' -42 = 11010110 -> -42 sw = -42 PRINT "signed word(-42) = "; sw; " (exp ";"-42";" )" ' source underfow [with signed word] -> destination underflow ' ' -500 = 1111111000001100 -> -500 sw = -500 PRINT "signed word(-500) = "; sw; " (exp ";"-500";" )" ' source overflow [with unsigned word] -> destination approximation ' ' 40000 = 0100111000100000 -> 00100000 -> 7232 sw = 40000 PRINT "signed word(40000) = "; sw; " (exp ";"7232";" )" ' source overflow [with signed dword] -> destination approximation ' ' -100500 = 11111111111111100111011101101100 -> 00011000100010010100 -> 10010100 sw = -100500 PRINT "signed word(-100500) = "; sw; " (exp ";"-2196";" )" ' source overflow [with unsigned dword] -> destination approximation sw = 10020000 PRINT "signed word(10020000) = "; sw; " (exp ";"25760";" )" ' ****************************************************************** ' ****************************************************************** ' ****************************************************************** WAIT KEY RELEASE : PRINT ' ****************************************************************** ' ******** destination: unsigned word ****************************** ' ****************************************************************** DIM w AS WORD ' source underflow -> destination underflow ' ' 42 = 11010110 -> 11010110 -> 42 w = 42 PRINT "word(42) = "; w; " (exp ";"42";" )" ' source underflow [with unsigned byte] -> destination underflow ' ' -42 = 11010110 -> -42 w = -42 PRINT "word(-42) = "; w; " (exp ";"42";" )" ' source underfow [with signed word] -> destination underflow ' ' -500 = 1111111000001100 -> -500 w = -500 PRINT "word(-500) = "; w; " (exp ";"500";" )" ' source overflow [with unsigned word] -> destination underflow ' ' 40000 = 0100111000100000 -> 00100000 -> 7232 w = 40000 PRINT "word(40000) = "; w; " (exp ";"40000";" )" ' source overflow [with signed dword] -> destination approximation ' ' -100500 = 11111111111111100111011101101100 -> 00011000100010010100 -> 10010100 w = -100500 PRINT "word(-100500) = "; w; " (exp ";"30752";" )" ' source overflow [with unsigned dword] -> destination approximation w = 10020000 PRINT "word(10020000) = "; w; " (exp ";"58528";" )" ' ****************************************************************** ' ****************************************************************** ' ****************************************************************** WAIT KEY RELEASE : PRINT ' ***************************************************************** ' ******** destination: signed dword ****************************** ' ***************************************************************** DIM dw AS SIGNED DWORD ' source underflow -> destination underflow ' ' 42 = 11010110 -> 11010110 -> 42 dw = 42 PRINT "signed dword(42) = "; dw; " (exp ";"42";" )" ' source underflow [with unsigned byte] -> destination underflow ' ' -42 = 11010110 -> -42 dw = -42 PRINT "signed dword(-42) = "; dw; " (exp ";"-42";" )" ' source underfow [with signed word] -> destination underflow ' ' -500 = 1111111000001100 -> -500 dw = -500 PRINT "signed dword(-500) = "; dw; " (exp ";"-500";" )" ' source underflow [with unsigned word] -> destination underflow ' ' 40000 = 0100111000100000 -> 00100000 -> 7232 dw = 40000 PRINT "signed dword(40000) = "; dw; " (exp ";"40000";" )" ' source underflow [with signed dword] -> destination underflow ' ' -100500 = 11111111111111100111011101101100 -> 00011000100010010100 -> 10010100 dw = -100500 PRINT "signed dword(-100500) = "; dw; " (exp ";"-100500";" )" ' source underflow [with unsigned dword] -> destination approximation dw = 10020000 PRINT "signed dword(10020000) = "; sw; " (exp ";"25760";" )" ' ****************************************************************** ' ****************************************************************** ' ****************************************************************** WAIT KEY RELEASE : PRINT ' ****************************************************************** ' ******** destination: unsigned word ****************************** ' ****************************************************************** DIM udw AS DWORD ' source underflow -> destination underflow ' ' 42 = 11010110 -> 11010110 -> 42 udw = 42 PRINT "unsigned dword(42) = "; udw; " (exp ";"42";" )" ' source underflow [with unsigned byte] -> destination underflow ' ' -42 = 11010110 -> -42 udw = -42 PRINT "unsigned dword(-42) = "; udw; " (exp ";"42";" )" ' source underfow [with signed word] -> destination underflow ' ' -500 = 1111111000001100 -> -500 udw = -500 PRINT "unsigned dword(-500) = "; udw; " (exp ";"500";" )" ' source underflow [with unsigned word] -> destination underflow ' ' 40000 = 0100111000100000 -> 00100000 -> 7232 udw = 40000 PRINT "unsigned dword(40000) = "; udw; " (exp ";"40000";" )" ' source underflow [with signed dword] -> destination underflow ' ' -100500 = 11111111111111100111011101101100 -> 00011000100010010100 -> 10010100 udw = -100500 PRINT "unsigned dword(-100500) = "; udw; " (exp ";"-100500";" )" ' source underflow [with unsigned dword] -> destination underflow udw = 10020000 PRINT "unsigned dword(10020000) = "; udw; " (exp ";"10020000";" )" END PROCEDURE example[] ON ALL BUT VIC20
Some examples: HELLO WORLD PARABOLA AND HYPERBOLA PRE-EMPTIVE PARALLEL COMPUTING

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