Promise IJWKW-559AH ISA Parallel Serial I/O Controller Card Winbond 561 V2.0

Promise IJWKW-559AH ISA Parallel Serial I/O Controller Card Winbond 561 V2.0

The Promise IJWKW-559AH is an ISA-bus combination I/O controller card providing both a parallel (DB25) port and a serial (DB9) port from a single ISA slot. Built around a Winbond controller chipset and marked V2.0 (board revision 561/559AH V2.0), this card is designed to add or restore parallel printer and serial COM port capability to systems with ISA expansion slots. FCC ID IJWKW-559AH is printed on the PCB edge.

Specifications & What's Included

• Model: IJWKW-559AH (FCC ID) / 561/559AH V2.0 (board revision)
• Bus Interface: ISA (16-bit)
• Parallel Port: 1x DB25 female (standard LPT/printer port)
• Serial Port: 1x DB9 male (standard COM/RS-232 port)
• Main Controller Chipset: Winbond
• Jumpers: IRQ selection jumpers present (JP1, JP7, JP8; IRQ options 3, 4, 5, 9, 12, 14, 15 silkscreened)
• PCB Color: Yellow/green
• Country of Manufacture: Taiwan
• Includes: Card only — no cables or software

Applications

ISA parallel/serial combo cards like the IJWKW-559AH were standard expansion hardware throughout the late 1980s and into the 1990s, when ISA was the dominant PC bus architecture. They were used to add LPT (parallel printer) and COM (serial) ports to desktop PCs — essential for connecting dot-matrix and laser printers, external modems, mice, and other RS-232 serial peripherals. Today these cards are sought by hobbyists maintaining vintage IBM PC-compatible systems, industrial users running legacy ISA-bus hardware or CNC machinery that requires a hardware LPT port, and retrocomputing enthusiasts. ISA I/O cards of this type are not compatible with modern PCI or PCIe systems — they require a motherboard with ISA slots.