{"product_id":"giddings-lewis-processor-module-pcb-assembly-501-03865-01-502-03061-02-0226-524","title":"Giddings \u0026 Lewis Processor Module PCB Assembly 501-03865-01 \u0026 502-03061-02","description":"\u003cp\u003eThis is a used Giddings \u0026amp; Lewis Electronics processor module PCB assembly bearing part numbers 501-03865-01 and 502-03061-02, silkscreened directly on the board face. The Giddings \u0026amp; Lewis brand logo is printed on the board. The board is a large-format, multi-layer through-hole assembly designed for use as a CPU processor module in a Giddings \u0026amp; Lewis CNC control system. Visible active ICs include a gold-lid Intel processor at IC-14, Intel 8284 clock generator, Intel 8288 bus controller, NEC D8259AC-2 programmable interrupt controller, MC2661PB and MC68661PB serial communications ICs, and Motorola MC68B50P. Logic ICs include SN75188N, AM26LS30PCB, AM26LS32PC-B, SN74LS00N, SN74LS04M, SN74LS640N, SN74LS245N, SN74LS240N, SN74LS373N, SN74LS138N, SN74LS273N, SN74LS244N, SN79LS32N, DM74LS174N, DM74LS244N, DM74LS160AN, DM74LS32H, and DM74LS20N among others. EPROMs and RAM ICs are present at multiple positions including 502-57554-00, 502-57555-00, 502-03333-01, and 502-03354-01. Board sections visible include TERMINATION SELECTION jumpers for TX, RTS, and DTR on channels A and B, ASYNC interface header J1, EXPANSION BUS connector CONN B, and gold-edge card connector P1. Test points and trimmer potentiometer V3-1 are accessible on the board. Physical condition shows signs of prior installation and use.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-524\u003c\/p\u003e","brand":"Giddings \u0026 Lewis Electronics","offers":[{"title":"Default Title","offer_id":48856709923056,"sku":"m00524","price":799.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/6F792CEC-A00B-4B91-889A-B8DA593D9775.jpg?v=1771625528","url":"https:\/\/mroexchange.com\/products\/giddings-lewis-processor-module-pcb-assembly-501-03865-01-502-03061-02-0226-524","provider":"MRO Exchange","version":"1.0","type":"link"}