WINBOND的W21C512的存储器管脚图，对此存储器的一些参数性能指标-WINBOND W21C512 memory of pin maps, this memory of some of the parameters of performance indicators

原创作品：QQYYPRO编程器简介 制作该编程器可使用8K 的78LE52﹐或64K 78LE516 .可编程AT89系列﹐AT89CX051系列﹐Winbond 78系列和27C512 EPROM。 可编程IC清单﹕ AT89C51 AT89C52 AT89C55/LV55 AT89S51/LS51 AT89S52/LS52 AT89S53 AT89C1051 AT89C2051 AT89C4051 78E51/LE51 78E5

Small programs allow copy entire RAM image in to programmable fiscal memory 27C512/also cleaned Winbond W27c512 supported and restore RAM image from it. i wrote this code easyway to fix some ram errors schematics of cashregister included , bu