Topic       : Documentation of the CT60
Author      : Didier MEQUIGNON
Version     : Version 1.03c (July 13, 2005)
Subject     : Documentation
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HCP-Version : 3
Compiled on : Atari
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View Ref-File2  SDRAM                                                          CT60

 By Rodolphe Czuba 

CT60 don't run without SDRAM !

The CT60 supports the PC100 & PC133 standard SDRAM DIMMs, but some
obsolet or uneeded DIMMs are not accepted.

In general, PC market provides Unbuffured 64-bits models, what you
need for CT60.

ATTENTION :

Don't confuse SDRAM (logical) banks (2 or 4 into a chip) with DIMM
(physical) banks (Single or double side DIMM) !

SDRAM DIMMs for CT60 :

   ∙ Must be PC100 or PC133 CL2.

   ∙ Must be UNBUFFURED.

   ∙ Must be populated with 4 logical banks chips (2 banks, obsolet,
     are refused). All DIMM > 32MB use 4 banks chips.

   ∙ 64 Bits (no Parity / ECC = 72 / 80 bits).


          Module  Nbr chips  Nbr sides  Organization   PAGE 
          64 MB       4          2      4M x 16 bits   4KB 
          64 MB       8          1      8M x 8 bits    8KB 
          64 MB       4          1      8M x 16 bits   8KB 
          128 MB      8          2      8M x 8 bits    8KB 
          128 MB      4          2      8M x 16 bits   8KB 
          128 MB      8          1      16M x 8 bits   16KB 
          128 MB      4          1      16M x 16 bits  8KB 
          256 MB      8          2      16M x 8 bits   16KB 
          256 MB      4          2      16M x 16 bits  8KB 
          256 MB      8          1      32M x 8 bits   16KB 
          512 MB      8          2      32M x 8 bits   16KB 
          512 MB      4          2      32M x 16 bits  16KB 


NOT SUPPORTED SDRAM DIMMs :

   ∙ All OBSOLET models : 8MB, 16MB & 32MB DIMMs.

   ∙ All DIMMs with 2 logical banks chips (needs 4 banks chips).

   ∙ REGISTERED / BUFFURED DIMMs (generally for Work Stations &
     Servers, not consumer PC).

   ∙ All DIMM with only TWO chips on one side (32-bit data width
     chips).

   ∙ 512 MB DIMM with chips on 1 side.