Text Errata
Home Up Text Errata EBCDIC Using DEBUG LMC Lights DEBUG script DEBUG script out push_pop.txt push_pop_out.txt call_push.txt call_push_out.txt int_push.txt int_push_out.txt ONEPAGE.ASM ADDTWO.ASM FIRST.ASM STARS.ASM TAIL.ASM SERIES.ASM GETSHOW.ASM
2003-09-23 11:45

Text Errata

The text has some obvious errors.  As I find them, I'll list them here.  See the sidebar for information on the use of the LMC Skip instructions, and the status lights that they test.  (Negative results after a SUBTRACT are also explained therein.)

The location counter must be incremented after the fetch and before the instruction is executed.  (It must not be incremented after the instruction is executed!)
The program counter register holds the address of the next instruction to be executed (not the current instruction).

Web Author: Ian! D. Allen idallen@idallen.ca      Updated: 2003-09-23 11:45

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