HP Laserjet ..again....

[Tony Duell]

> 
> 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