Guzik RWA XMIT 8-Bit ISA Interface Board IBM 30127 Assy 301270 Controller

Guzik RWA XMIT 8-Bit ISA Interface Board IBM 30127 Assy 301270 Controller

The Guzik RWA XMIT is an 8-bit ISA expansion board designed to serve as an interface card within Guzik disk read/write analysis and test systems. Labeled "RWA XMIT" (Read/Write Amplifier Transmit), this card provides the signal interface between a host IBM-compatible PC and Guzik's disk testing instrumentation. It connects via a bracket-mounted DB-15 female connector and is populated with standard TTL-logic DIP integrated circuits, a configurable DIP switch bank, and an onboard crystal oscillator. The PCB silkscreen identifies it as an IBM Interface Board, Assembly No. 301270, under IBM part number 30127.

Specifications & What's Included

• Manufacturer: Guzik
• Board designation: RWA XMIT (Read/Write Amplifier Transmit Interface)
• IBM Part Number: 30127
• Assembly Number: 301270
• Bus interface: 8-bit ISA (PC/XT-compatible edge connector)
• Bracket connector: DB-15 female (full-height bracket)
• Onboard components: multiple DIP ICs including Texas Instruments SN74LS597N and additional 74-series TTL logic devices
• Configuration: red 8-position DIP switch bank for board configuration
• Onboard crystal oscillator (frequency not fully legible in photos)
• PCB silkscreen: "IBM Interface Board, Assy No. 301270"
• What's included: board only

Applications

Guzik Technical Enterprises is a manufacturer of disk drive test and certification equipment, producing systems used to analyze and certify the read/write performance of magnetic disk drives — primarily in hard disk drive manufacturing and quality-control environments. The RWA XMIT board is an interface card designed to slot into a standard IBM PC/XT ISA bus system and connect that host computer to Guzik test instrumentation via the DB-15 connector, passing read/write control and data signals between the PC and the test system. This type of interface card dates from the mid-to-late 1980s era when 8-bit ISA was the standard expansion bus for IBM PCs and compatibles used as controller hosts in automated test equipment (ATE) setups. Buyers for this card are typically engineers or technicians maintaining legacy Guzik disk test stations, restoring vintage disk testing systems, or seeking a replacement interface board for an existing Guzik installation. The 8-bit ISA form factor means it is compatible with PC/XT systems and with 16-bit ISA motherboards that maintain backward compatibility with 8-bit cards.