for the V70, built on their HP 64700 Series systems, the successor to the HP 64000 Series, specifically the HP 64758. It enables trace function like a logic analyzer. This test equipment also displays disassembled source code automatically, with trace data display and without an object file, and displays high-level language source code when the source code and the object files are provided and they were compiled in DWARF format. An interface for the V60 (10339G) was also in the catalog, but the long probing-pod cable required "special grade qualified" devices, i.e. the high-speed grade V70. HP 64758: Main units, sub-units, and hosted interface Software options Hardware options Failings Strategic failure of the V80 microarchitecture In its development phase, the V80 was thought to have the same performance as the Intel 80486, but they ended up having many different features. The internal execution for each instruction of the V80 needed at least two cycles, while that of i486 required one. The internal pipeline of the V80 seemed buffered asynchronous, but that of i486 was synchronous. In other words, the internal microarchitecture of V80 was CISC, but that of i486 was RISC. Both of their ISAs allowed long non-uniform CISC instructions, but the i486 had a wider, 128-bit internal cache memory bus, while that of V80 had a 32-bit width. This difference can be seen on their die photos. The design was fatal from the performance point of view, but NEC did not change it. NEC might have been able to redesign the physical design, with the same register-transfer level, but it did not. Lack of commercial success The V60-V80 architecture did not enjoy much commercial success. The V60, V70, and V80 were listed in the 1989 and 1990 NEC catalogs in their PGA packaging. A NEC catalog from 1995 still listed the V60 and V70 (not only in their PGA version but also in a QFP packaging, and also included a low-cost variant of the V60 named μPD70615, which eliminated V20/V30 emulation and FRM function), alongside their assorted chipsets; but the V80 was not offered in this catalog. The 1999 edition of the same catalog no longer had any V60-V80 products. Successors The V800 series In 1992, NEC launched a new model, the V800 Series 32-bit microcontroller; but it did not have a memory management unit (MMU). It had a RISC-based architecture, inspired by the Intel i960 and MIPS architectures,