[Coco] Errors in Leventhal's 6809 book

[Dave Philipsen]

If anyone’s keeping track of errors in the main 6809 Assembly Language Programming book, I can mention the following:

Appendix A-18 NOP is listed as 2 byte single cycle instruction. I believe it is a 1 byte two cycle instruction. 

On the same page the numbers for LBRN should be swapped to read 4 bytes and 5 cycles. 

The ISBN printed on the back cover and inside the front page is wrong (numbers transposed). 

On page 3-12 the ADDA #$30 should be ADDA $30. 

There are other errors, too,  that I have seen but not recorded. 

-Dave Philipsen

> On Jan 29, 2022, at 9:52 PM, Joel Rees <joel.rees at gmail.com> wrote:
> 
> On Sun, Jan 30, 2022 at 1:57 AM Robert Gault <robert.gault at att.net> wrote:
>> 
>> Here is a typical issue with the Leventhal book. He has   clra   clrb   std ,s
>> The first two lines are two cycles each but it could be:
>>  ldd #0   std ,s
>> where ldd #0 is three cycles.