VOGONS


First post, by 9646gt

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I am an absolute sucker for low profile 486 and pentium machines. SUCKER. So I ended up with this AST Bravo LP system that's super tiny and never thought to check if it had cache before upgrading it from a 486 DX 50Mhz to a DX2 66 (pointless I know haha). Then I realized there was no cache on this board and nowhere to install one. I was browsing Ebay and somehow while searching "AST Cache" came across this proprietary card that claimed it was an industrial computer part and remembered seeing a nearly identical set of connectors on the motherboard of my little machine. So I bought it and lo and behold it fit the socket!

I booted up hoping that nothing went wrong and I was greeted with 64k of cache! I plan to run Cacheck to see how the configuration works out and how much RAM it's able to cache. The kicker was I took a risk at just $15 when I see these all online now for about $90 or more and it sure did pay off! It's super tempting to not drop my DX4 100 in here instead of my full-size Gateway machine but I know without being able to cache enough RAM it is kind of pointless aside from having a fast and tiny 486 to brag about haha.

Reply 1 of 4, by Major Jackyl

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When you mentioned it in your other post, I wanted to know what it looked like. Thanks for sharing. I've never seen a module like that before.

Main Loadout (daily drivers):
Intel TE430VX, Pentium Sy022 (133), Cirrus Logic 5440, SB16 CT1740
ECS K7S5A, A-XP1600+, MSI R9550
ASUS M2N-E, A64X2-4600+, PNY GTX670, SB X-Fi Elite Pro
MSI Z690, Intel 12900K, MSI RTX3090, SB AE-7

Reply 2 of 4, by 9646gt

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Major Jackyl wrote on 2025-06-04, 01:53:

When you mentioned it in your other post, I wanted to know what it looked like. Thanks for sharing. I've never seen a module like that before.

No problem! I'm hoping it will help someone in the future who ends up needing cache on one of these old AST boards. I just hate that every other example I see is priced cray high... maybe a realistic offer to the sellers on eBay will net someone a decent deal though.

Reply 3 of 4, by 9646gt

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Well it looks like cachechk is only showing 7Mb cacheable sadly. Attached is a screenshot of why from ChatGPT when I provided it screen shots and pictures of the cache card since I don’t understand the low level breakdown on my own haha. I wonder if I can easily solder in a new TAG chip??

Reply 4 of 4, by 9646gt

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So back to chatGPT I mentioned using a Toshiba TC55V328AJ-15 28pin DIP that I have available which is a 32kx8 chip. It mentions that the current 2kx8 is using 11 address lines and that the 32Kx8 will use 15 address lines and must be supported by the VLSI VL82C480 controller. Anyone have good techno insight on if this is worth trying please?!