Compu/Time - 256K RAM Board
This looks like a great RAM board. It had
its own onboard LSI dynamic RAM refresh controller. CompuTime had come a long
way! Unfortunately I cannot locate a manual for the board. If you
have one please let me know.
The CT256-I supports the following advanced features:
64K Bytes to 256K Bytes using 64K X 1 DRAM memory chips
256K Bytes to 1M Byte using 2§6K X 1 DRAM memory chips
Full IEEE-696 S100 bus support, including:
24 bi t
Memory management capability to allow the addressing of a
full one megabyte of RAM for systems generating only a 16-bit address
Memory mapping on 16K or 64K boundaries
Flexible parity generation and detection capabilites:
Parity latch and
LED error indicator
interrupt on parity error
trap on parity error
on input status port
Refresh cycles performed transparently to system
Refresh during processor wait states or reset can be
enabled through a jumper option, allowing use with systems incorporating a
Onboard M1 wait state generator allows use of the CT256-I
in systems with clocks up to 6 MHz.
Board operates at 4 MHz with no wait states.
Options provided for use of 200ns or 150ns RAMs.
The manual for this board can be obtained
Other Compu/Time Boards
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