Really stupid PDP assembler question

>> -----Original Message----- >> From: cctalk-bounces(a)classiccmp.org >> [mailto:cctalk-bounces@classiccmp.org] On Behalf Of Paul Koning >> Sent: Friday, June 25, 2004 6:03 PM >> To: cctalk(a)classiccmp.org >> Subject: Re: Really stupid PDP assembler question >> >> >>>>> "wai-sun" == wai-sun chia &lt;squidster(a)techie.com&gt; writes: >> >> wai-sun> *WARNING: NEWBIE ALERT* Ok. I must be an idiot. >> I for the wai-sun> life of me cannot figure out why is it >> when I say: >> >> wai-sun> 1000: .ASCIZ /HELLO WORLD!/ >> >> wai-sun> After assembling and linking it turns out that: >> >> wai-sun> 1000: 042510 ;H=110, E=105 ... >> >> wai-sun> Why is the octal ASCII code and the content of >> the addresses wai-sun> different? >> >> They aren't. >> >> Remember that bytes are 8 bits and octal gives you 3 bits per digit. >> So (unlike hex) the boundary between the two bytes is "in >> the middle" >> of the fourth digit. >> >> The word is (0105 << 8) + 0110 which 042510 as you showed, >> and similarly for the other words. >> >> paul >>