HP Laserjet ..again....

From: Jim Isbell <millenniumfalcon_at_cableone.net>
Date: Sun Sep 19 08:35:33 2004

Sure the buss width matters if you are measuring memory as it is NORMALY
measured, in Bytes, not Bits.

Tony Duell wrote:

>>As I stated earlier, I have cannibalized three HP laserjet series II
>>printers. In looking over the parts recovered I find that I have three
>>(3) totally different memory boards.
>>
>>The first is populated with small chips on BOTH sides of the board with
>>a total of 128 soldered in chips that appear from their part numbers to
>>be 256K memory chips, That is the number 256 appears within the part
>>number. Now I don't know how wide the buss is but I am assuming 8 bits
>>because of its age. If so this board is a 4 Megabyte memory board.
>>
>>
>
>The bus width doesn't matter in determining the memory size. If you had
>16 1 megabit memory chips arranged as 2 megs * 8 bits, that a 2 megabyte
>board. If you had them arrangeded as 1 meg * 16 bits, that's still a 2
>megabyte board.
>
>The Series 2 formatters use a 68000 processor (the 64 pin chip on the
>formatter board) and thus have a 16 bit wide databus.
>
>-tony
>
>
>
>
Received on Sun Sep 19 2004 - 08:35:33 BST

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