Compaq ProLinea 4/24s

Compaq ProLinea 4/24s

[Vin194]

From a vintage‑computing and university museum perspective, the Compaq ProLinea 4/24s represents an important chapter in early‑1990s PC history as part of Compaq’s budget ProLinea series, which brought 486‑class IBM PC‑compatible desktops into the mainstream at unprecedented low prices and helped trigger a major industry price war in 1992. Models like the 4/24s typically featured a 486‑series processor, modest RAM and hard drive by modern standards, and were designed for everyday business and educational use, making them highly accessible to first‑time buyers and institutions alike. While not as celebrated as flagship machines like the Deskpro or more commercially successful lines like the later Presario, the ProLinea family nevertheless sold hundreds of thousands of units and marked Compaq’s strategic push into the low‑cost PC market, influencing competitor pricing and broadening PC adoption in schools, offices, and homes.

• Manufacturer: Compaq Computer Corporation
• Type: Desktop IBM‑PC‑compatible personal computer
• Release Date: October 1992
• Cost at release: ~$2,000 (adjusted for inflation)
• Cost with peripherals: ~$4,400 (adjusted for inflation)
• MIPS: ~20

Hardware Specifications

• CPU: Intel 486SX @ 25 MHz (no internal math coprocessor in base config)
• Memory: 4 MB onboard (70 ns SIMM), expandable (some boards up to ~32 MB)
• Graphics: Often Tseng Labs ET4000/W32 local‑bus VGA or similar integrated graphics on 486 models
• Hard Drive: Originally commonly a ~120 MB IDE hard disk in many 4/25s units
• Floppy Drive: 1.44 MB 3.5″ floppy drive (some units also supported a 5.25″)
• Expansion Slots: Typically 2–3 ISA slots + shared PCI/ISA on some configurations
• Integrated I/O: Serial, parallel, keyboard, PS/2 mouse, and VGA ports (standard PC configuration)
• Weight: Approximately ~21–24 lbs (9.5–10.9 kg) depending on configuration and drives.

Operating System & Programming Languages 

• Operating System:
  • Primary OS: MS‑DOS 5.0 or 6.0 (depending on the exact year/configuration).
  • Graphical Environment: Windows 3.0 or 3.1 (Windows ran on top of DOS).
  • Optional OS: Some installations could run OS/2 2.x or early Linux ports for PCs, but this was less common.
• Supported Languages:
  • Compiled Languages:
    • C / C++ (Turbo C/C++, Borland C++, Microsoft C)
    • Pascal / Object Pascal (Turbo Pascal, Borland Delphi later on Windows)
    • Fortran (IBM Fortran, Lahey Fortran)
  • Interpreted Languages:
    • BASIC (GW‑BASIC, QuickBASIC, QBasic)
    • Bourne / DOS batch scripting
    • Early versions of Python or Perl (if installed, mostly under DOS extenders or Windows 3.x)
  • Other: Assembly language programming via MASM / TASM for low‑level development.

Notables

• Part of Compaq’s ProLinea line, it was among the first 486‑class PCs sold at sub‑$1,000 prices, making powerful IBM-compatible computing accessible to homes, schools, and small offices.
• Its aggressive pricing in 1992 forced competitors to cut PC prices dramatically, accelerating desktop adoption worldwide.
• Sold hundreds of thousands of units in its first year, making it one of the most popular “entry-level” 486 PCs of the era.
• Represents the democratization of desktop computing, bridging business-grade PCs and home computers.

Donated by: Dr. Arlen Michaels