48g upgrade...4mb chip instead of a 512k...Work?



#4

Just wondering if you could use a 4mb SRAM chip instead of a 512K one when doing upgrades. If it would, I realise that you could only access 512k. Can just get them cheaper, thats all.


#5

Should be OK, if the chip is rated for the same operating voltage and as long as you wire all of the extra address lines to either ground or Vcc. (If you leave the extra address lines floating, they will oscillate, and it will both draw more power and not work correctly.)

#6

Quote:
Just wondering if you could use a 4mb SRAM chip instead of a 512K one when doing upgrades. If it would, I realise that you could only access 512k. Can just get them cheaper, thats all.

Most of today's RAM chips are listed in terms of Mb (megabits). So you would need to divide by 8 in order to get the number of KB (kilobytes). In plain English, 4Mb is the same as 512KB.


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