#SINCLAIR ZX SPECTRUM MOTHERBOARD PRO#

#SINCLAIR ZX SPECTRUM MOTHERBOARD PRO#

If youвЂ™re not short on cash, then the Chip Tester Pro may be more to your liking, however itвЂ™s hard to beat the simplicity and thriftiness of building your own simple tester from spare parts. Not every issue can be identified with such a simple tester, however itвЂ™s great at weeding out the chips that are definitely dead. A failed test is a sure sign that the chip is bad, however the tester does occasionally report a false pass. ItвЂ™s a great sanity check for when youвЂ™re neck deep in suspect DRAM. Just pop the suspect chip into the ZIF socket, hit the reset switch, and wait for the LED вЂ“ green is good, and red means itвЂ™s toast. The original project can be found here, including the Arduino code. With an Arduino at its core, this DRAM tester uses the most basic of electronic components, and any modest tinkerer should have pretty much everything in stock.

These computers are incredibly popular in the vintage computing community, and its not uncommon to find bad memory in any of them. Likewise, the 41256 was used in the Commodore Amiga.

4164 DRAM was used in several popular home computers throughout the 1970s and 1980s, including the Apple ][ series, Commodore 64, ZX Spectrum and many more. This little tester can be used with 416 DRAM memory chips. Identifying bad memory chips can quickly become a chore, so spent some time putting together a cheap DRAM tester out of spare parts. Some of the most popular vintage computers are now more than forty years old, and their memory just ainвЂ™t how it used to be.

Sinclair zx spectrum motherboard