[4] Differences like that meant that a V20 could typically complete more instructions in a given time than an Intel 8088 running at the same frequency.

[10] The ADD4S, SUB4S, and CMP4S instructions were able to add, subtract, and compare huge packed binary-coded decimal numbers stored in memory.

Another family consisted of the TEST1, SET1, CLR1, and NOT1 instructions, which test, set, clear, and invert single bits of their operands, but are far less efficient than the later i80386 equivalents BT, BTS, BTR, and BTC; neither are their encodings compatible.

There were two instructions to extract and insert bit fields of arbitrary lengths (EXT, INS).

And finally, there were two additional repeat prefixes, REPC and REPNC, which amended the original REPE and REPNE instructions for scanning a string of bytes or words (with instructions SCAS and CMPS) while a less or not less condition remained true.

The operand of the instruction specifies an interrupt number whose vector contains the segment:offset where emulation is to begin.

This suit was settled out of court, with NEC agreeing to license the designs from Intel.

[14] They further found Intel to have forfeited their copyright by neglecting to ensure that all second-source chips were suitably marked.