Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Looking at the chips installed in an Apple II Plus motherboard, is there a way to tell which chips are 4K RAM chips and which are 16K?

share|improve this question

migrated from electronics.stackexchange.com Nov 8 '11 at 2:34

This question came from our site for electronics and electrical engineering professionals, students, and enthusiasts.

1  
By the numbers printed on them? –  Majenko Nov 7 '11 at 18:59
1  
IIRC the 2116 was a standard for 16k, don't recall the prefix though. –  stevenvh Nov 7 '11 at 19:03
    
fact check: the 2116 chip was a 1K x 4 bit static ram; there appears to also have been a 16K x 8 RAM board employing 32 of the buggers, bearing the designation CCS 2116. At the time, static ram was considered expensive, and I believe the Apple used dynamic ram, like some contemporary machines. The 4K dynamic chips needed three supply voltages. –  JustJeff Nov 8 '11 at 3:11
add comment

1 Answer

According to this site the Apple II used TMS4116-20 DRAMs for the 16k chips, although I cannot find any references I'd assume the TMS4104 was used for 4k versions.

The full schematics for are available in the Apple II Reference Manual.

share|improve this answer
    
the 2+ I used to have had 4116 chips in it –  JustJeff Nov 8 '11 at 3:13
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.