Rainbow 100. The Rainbow 100 was a microcomputer introduced by Digital Equipment Corporation (DEC) in 1982. This desktop unit had a monitor similar to the VT220 in a dual-CPU box with both 4 MHz Zilog Z80 and 4.81 MHz Intel 8088 CPUs.
Why can’t I run MS-DOS on the Rainbow 100B?
The Rainbow 100B fixed this overlap in hardware by changes to the board design that allowed the OS to move the hardware interrupts. This means that the MS-DOS 3.10b version for the Rainbow can only run on the Rainbow 100B. DEC itself ported Microsoft Windows 1.0 to the Rainbow.
What version of Windows was on the DEC Rainbow?
DEC itself ported Microsoft Windows 1.0 to the Rainbow. There was also a third-party upgrade that included a 286 processor board and a modified version of Windows 3.0 . Software bundled with DEC Rainbow floor model included:
What kind of terminal is Rainbow 100?
The Rainbow 100 was a triple-use machine: VT100 mode (industry standard terminal for interacting with DEC’s own VAX ), 8-bit CP/M mode (using the Z80), and CP/M-86 or MS-DOS mode using the 8088. The Rainbow came in three models, the 100A, 100B and 100+. The “A” model was the first released, followed later by the “B” model.
What are the features of Rainbow system?
The base Rainbow system was capable of displaying text in 80×24- or 132×24-character format in monochrome only. The system could apply attributes to text including bolding, double-width, and double-height-double-width. The graphics option was a user-installable module that added graphics and color display capabilities to the Rainbow system.
What type of video signals does the Rainbow produce?
The base Rainbow system generates a TTL 15 kHz composite-video signal compatible with RS-170 (NTSC) in monochrome mode. With the inclusion of the graphics option, the Rainbow could also output sync-on-green RGB video signals at TTL levels.
