gnupic: gpasm question/may be a bug
Subject:
Re: gpasm question/may be a bug
From:
Samuel Tardieu ####@####.####
Date:
18 Oct 2002 20:27:27 -0000
Message-Id: <2002-10-18-22-24-07+trackit+sam@rfc1149.net>
On 18/10, Tobias Schlottke wrote:
| xorwf PORTB,PORTB
This has no meaning, as the second argument as to be "w" or "f".
Your assembler probably assembles xorwf as:
0x600 | port address | (flag << 7)
where "flag" is 0 for "w" and 1 for "f".
As you erroneously used "PORTB" (whose value is 6) as "flag", this gives:
0x600 | 6 | (6 << 7) = 0x706
0x706 just happens to be the opcode for "addwf PORTB,w", no mistery here.
Sam
--
Samuel Tardieu -- ####@####.#### -- http://www.rfc1149.net/sam
Give PICs the power of Forth -- http://www.rfc1149.net/devel/picforth
