[5] Later, Merge was enhanced to make use of the virtual 8086 mode provided by the 80386 processor; that version was offered with Microport SVR3 starting in 1987,[citation needed] and subsequently with SCO Unix.
In the late 1980s, the main commercial competitor of Merge was VP/IX developed by Interactive Systems Corporation and Phoenix Technologies.
[citation needed] The acquisition went through, and Platinum went on to develop the SCO Merge 4 version with Windows 95 support, which was released in 1998.
Reporting that at least one terminal emulator ran on it but not on native MS-DOS on the 6300 Plus, the magazine estimated that Simultask's performance running DOS software was comparable to that of the original IBM PC AT.
Also approving of the documentation and ease of installation, InfoWorld concluded that Simultask was "an elegant and reasonably priced one-box solution for those who want to access both Unix and MS-DOS".