23128 and 23256 ROMs are not as hard to deal with, as 27XXX JEDEC standard EPROMs share the same pinout. However, some of the benefits of the 2364 ROM-el still remain, such as:
- Use of 5V programmable FLASH/EEPROM
- Can be pre-assembled and field programmed
If used in a switched ROM scenario (one where the upper address bits are toggled on or off via a switch), this design can save a lot of time (most 27256/27512 switched ROM replacement options I’ve seen manually bend the additional address pins over the top of the EPROM and hand solder a resistor to Vcc.)
Thus, I’m considering this unit as well for production. It offers some additional configuration options over the 2364 ROM-el, but retains the ease of assembly and programming of the 2364 ROM-el.
One thought on “23256 ROM-el”
I’m pretty sure I’m addicted to Jim’s designs.
Keep ’em coming!
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