atari email archive

a collection of messages sent at Atari from 1983 to 1992.

SA II ROMs

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ROMs for SA II					
--------------
	The schematics for the SA II call for 300 ns 27512s. If that is what 
you really want, then that is what I will specify.

	However, you should know that a 27512 is an NMOS part and we do not
stock them and they may be difficult to get. (CMOS has generally taken over.) 

	Note also that we do not stock 300 ns EPROMs or OTPs. 

	Tell me which part you want to use.


EPROMs
------
  Type		 Atari PN	Speed 	Type	Cost	# in inventory	
---------	----------	------	----	-----	--------------
27C512-300	137448-300	300 ns	CMOS	$ none	       0
27C512-250	137448-250	250 ns	CMOS	$ 4.50	  52,238
27C512-200	137448-200	200 ns	CMOS	$ 5.70    17,487

27512-300	137444-300	300 ns	NMOS	$ 6.75	       0	
27512-250	137444-250	250 ns	NMOS	$ 6.50	       0	
27512-200	137444-200	200 ns	NMOS	$ 7.90	       0


OTPs
-----
27C512-300	137454-300	300 ns	CMOS	$ 3.80	       0
27C512-250	137454-250	250 ns	CMOS	$ 5.10	  46,559.
27C512-200	137454-200	200 ns	CMOS	$ 5.35    23,511.


	Jed	

Stun Runner SA II ROM numbers

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Here are the part numbers for Stun Runner SA II:

The schematics calls for 27512-300 but since we don't have any, Byron has 
approved the use of 27C512-250 .

     
136070-1123	10C		27C512, 250 ns

136070-1124	1C/D		27C512, 250 ns

136070-1125	1D/E		27C512, 250 ns

136070-1126	1E/F		27C512, 250 ns

136070-1127	1F/H		27C512, 250 ns


	Jed

SA II ROMs

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I have looked at the SA II TOPP.LIS and although you have used the
programmed part numbers I gave you, you have listed the parts as 300 ns
even though I asked you to use 250 ns.

Please explain. (Did someone tell you to do this?)


	Jed

SA II ROMS

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  JED,
    BYRON SHEPPARD CHANGED THE PARTS TO 300N. HE WAS TOLD BY HIS
    SUPERIORS TO CALL OUT 300N BUT OK 250N WHEN PURCHASING ASKED
    TO SUBSTITUTE.THIS WAS A LAST MINUTE CHANGE BEFORE RELEASING
    THE PARTS LIST.I AM SORRY YOU WERE NOT KEPT INFORMED.
                                                           JOE
Message 1 of 4

Jul 27, 1989