![Texas Instruments TMS2532 - 1979 Vintage; EPROM - used in #1ESS switch from Western Electric. For those not familiar the #1ESS was used as a local switch in the Bell System later Texas Instruments TMS2532 - 1979 Vintage; EPROM - used in #1ESS switch from Western Electric. For those not familiar the #1ESS was used as a local switch in the Bell System later](https://i.redd.it/texas-instruments-tms2532-1979-vintage-eprom-used-in-switch-v0-rwcfnscgspva1.jpg?width=6800&format=pjpg&auto=webp&s=82867f9dedd5cca09e1f1d2f240233350f08514e)
Texas Instruments TMS2532 - 1979 Vintage; EPROM - used in #1ESS switch from Western Electric. For those not familiar the #1ESS was used as a local switch in the Bell System later
![Texas Instruments TMS2532 - 1979 Vintage; EPROM - used in #1ESS switch from Western Electric. For those not familiar the #1ESS was used as a local switch in the Bell System later Texas Instruments TMS2532 - 1979 Vintage; EPROM - used in #1ESS switch from Western Electric. For those not familiar the #1ESS was used as a local switch in the Bell System later](https://i.redd.it/texas-instruments-tms2532-1979-vintage-eprom-used-in-switch-v0-3nfr690ispva1.jpg?width=6800&format=pjpg&auto=webp&s=8537fae3f67aa0436633145d4f1878a2f1dd9392)
Texas Instruments TMS2532 - 1979 Vintage; EPROM - used in #1ESS switch from Western Electric. For those not familiar the #1ESS was used as a local switch in the Bell System later
![EPROM switcher- Have separate street and race programs in your Motronic - Rennlist - Porsche Discussion Forums EPROM switcher- Have separate street and race programs in your Motronic - Rennlist - Porsche Discussion Forums](http://forums.rennlist.com/upload/eprom_switcher.jpg)
EPROM switcher- Have separate street and race programs in your Motronic - Rennlist - Porsche Discussion Forums
![AMIGAstore™ on X: "It (Eprom chip included) lets you switch between Kickstart ROM 3.1 & Kickstart ROM 3.2.1 using a switcher (included) Full configured Note: if you have an A500 rev5 or AMIGAstore™ on X: "It (Eprom chip included) lets you switch between Kickstart ROM 3.1 & Kickstart ROM 3.2.1 using a switcher (included) Full configured Note: if you have an A500 rev5 or](https://pbs.twimg.com/media/FUpY0E1WIAQR35Y.jpg:large)
AMIGAstore™ on X: "It (Eprom chip included) lets you switch between Kickstart ROM 3.1 & Kickstart ROM 3.2.1 using a switcher (included) Full configured Note: if you have an A500 rev5 or
![General Automation 31D70009A01 16 Series CMOS/EPROM Memory Switch Board: Amazon.com: Industrial & Scientific General Automation 31D70009A01 16 Series CMOS/EPROM Memory Switch Board: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/51kzchzXx3L._AC_UF894,1000_QL80_.jpg)