Bitwise And - Internal error: exception: access violation

[ndudman]

Hi

With the follow text code i get a

• >"C:\Program Files\ZBasic\zbasic.exe" --target-device=ZX24p --directory="Z:\home\ndudman\source\swapper/" "test.bas"
  Internal error: exception: access violation
  >Exit code: 1

if the last line is commented out all is ok... what am I doing wrong with the Bitwise AND ?

Code: Select all

sub main()
	Dim resp(1 to 5) as Byte
	resp(1) = 0
	resp(2) = 0
	resp(3) = 0
	Dim MSB as UnsignedInteger = Shl(CUInt(resp(2)), 8)	
	Dim b as Byte = resp(3) 
	Dim LSB as UnsignedInteger = CUInt(b AND 0HFF )
end sub

Thanks for any pointers
Neil

[dkinzer]

what am I doing wrong with the Bitwise AND ?

The error is with the second operand to the And, an improperly formed hexadecimal constant. It will compile without error if you change it as shown below.

Code: Select all

Dim LSB as UnsignedInteger = CUInt(b AND &HFF)

The internal error occurs because the improperly formed initializer isn't being handled correctly. We will need to research this further to find out how to correct it.

[ndudman]

Thanks very much... looking again at the correction... I can't believe I didn't notice the missing & ... but thanks as I was stumped.

Glad to have helped a little, and thanks for your help

Neil