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That's an old one! I haven't used on of those in maybe 20 years.
You can read it just like a static RAM, make the CE pin low and put the address on the input pins, the outputs will show the 4-bit data. It is fully static so you don't have to worry about timing or clock signals.
Brian.
It might be tricky. The 82S129 has a 50nS access time which is faster than many EPROMs so if you are using it in a critical application you may not have enough speed. If the speed isn't important you can use almost any EPROM, only 256 addresses and 4-bits are used so even the smallest modern EPROM will have many times more capacity than you need. Use whichever is easiest for you and tie any address lines higher than A7 to ground and program the upper 4 bits of data to zero between addresses 0 to 256.
Brian.
It depends on what it does on the board. On some clones they were used as a bus command decoder instead of Intels 8288, if that is the case the speed is critical and an EPROM will not work. If it is used as a peripheral address decoder you might be better to consider either a TTL decoder (74LS138 style) or a PAL, both will work at much higher speed than an EPROM.
Back many years ago the AMD data book for the 8088 had a design for a PAL based version of the 8288. Unfortunately, (really bad timing) I took a car load of data books, including that one to a paper recycling center last week. I'm moving home shortly and needed to clear a lot of space so hundreds of data books had to go!
Brian.