Jump to content
Larry

C060609

Recommended Posts

I'm cleaning off my work table, and ran across an unmarked packet of chips (probably from Best Elec.).  It contained 2 each MB81464-10 drams and a C060609.  (BTW, the print on the chips is clearly C0, and not CO.) Does anybody recognize what the C060609 is, and what these are used for?  It's a 20-pin IC, so that should narrow it down.  I must have bought these for some type of upgrade -- 600XL, maybe?  Hope they are for the 600XL -- I have a new one that I'd like to upgrade this winter.

Thanks,

Larry

Share this post


Link to post
Share on other sites

Thanks!  Now here's a second part -- can the 81464 be used for the 600XL upgrade?  The pinouts look the same.  If these are OK, I'll use them on that 600XL expansion.

 

Share this post


Link to post
Share on other sites
9 minutes ago, ndary said:

Hi Larry.. These are 64k ram chip and an MMU

From the part#(81464) these RAM chips are likely 64k x 4 bit DRAM, the MMU is for the 1200XL/1400XL. 

  • Like 1

Share this post


Link to post
Share on other sites

Just had a quick look at the datasheets. I have some TMS4164 RAM chips here and these can, I believe, be fitted to an XL (same pinouts as others I've seen fitted). I compared the datasheet to the chips you have and the pinouts are completely different.

Share this post


Link to post
Share on other sites
20 minutes ago, Tickled_Pink said:

Just had a quick look at the datasheets. I have some TMS4164 RAM chips here and these can, I believe, be fitted to an XL (same pinouts as others I've seen fitted). I compared the datasheet to the chips you have and the pinouts are completely different.

@BillC are right 😉.

 

The xx464 DRAM chips are 64kx4 Bit organised (2 chips for 64kB, mostly used in ATARI XEGS, and some of the latest 65XE/800XE/130XE) 

See Datasheet attached...

 

The xx164 instead are 64kx1 Bit organised (8 chips for 64kB), used in lots of XL/XE and lots of other system too...)

 

Gtx.,

andY

81464_DRAM.pdf

Edited by andymanone
  • Like 1

Share this post


Link to post
Share on other sites

Hi-

Thanks for the input.  The chips I was comparing the 81464 ones were 4464 which are typically mentioned in the 600XL 16k, 2-chip upgrades (to 64k, 2-chip memory). 

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...

  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...