This technology is ancient, who still has an ISA slot available? Operations like this are best done with Arduino based solutions.

PROM reader

At the left a ISA-bus board containing two 8255 PPI chips and decoding logic. Jumpers allow it to be placed in the 0x300 address area, reserved for experimental boards. The idea came from an old Elektor and I just implemented two 8255s instead of just one.

At the lower right a daughterboard for 74287 and 74288 PROMS. Above that the 2708 EPROM reader board. This EPROM type and its predecessors are often absent from EPROM-programmers because they need multiple power supplies like +12V and -5V.

Some trival QBasic programs

• 74S287 reading program Producing hexadecimal address - data pairs
• 74S288 reading program Producing hexadecimal address - data pairs
• 2708 reading program Producing an Intel-Hex file

Updated: 2010-09-26

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