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Re: AST RAMStack Plus
- Subject: Re: AST RAMStack Plus
- From: Roy Miller <millers@inetnebr.com>
- Date: Tue, 10 Jul 2001 08:50:40 -0500
- Newsgroups: comp.sys.apple2
- References: <u%x27.237$y%2.34764@newsread1.prod.itd.earthlink.net>
- Xref: archiver1.google.com comp.sys.apple2:10270
As I recall, one meg drams used more pins than 256K drams, so, unless I'm wrong,
no, you can't put more memory on the card. OH! There is one other possible
issue. On IBM machines, at least, you could well need a different decoder chip
to be able to read the denser drams.
For example, not many know that the IBM XT motherboard, which is labeled 64-256K
(up to four banks of 64K chips) can have 640 on the motherboard, IF you solder a
jumper and then put a shorting block on it on the extreme right of the
motherboard, and insert a decoding chip (the last time I bought one it cost me
17 cents) in a certain socket, and then replaced two banks of 64K chips with two
banks of 256K chips.
Roy
Brendon Woirhaye wrote:
> Anyone know much about this card?
>
> I have one. It has one bank of 41256's soldered to the board, plus three
> socketed banks. Mine are full of 41256 and 6256 chips for a total of a meg.
>
> Question: Can larger capacity chips be used in the three socketed banks?
>
> The other big feature about the card is that it has 4 sockets for ROMs.
> Anyone using these for any practical purpose?