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--- philpem:vlsi-technology:arm2 [2025/10/15 10:56] – created - external edit 127.0.0.1
+++ philpem:vlsi-technology:arm2 [2025/10/15 21:40] (current) – philpem
@@ Line 1: / Line 1: @@
 {{tag>collection_philpem vendor_vlsi-technology type_unknown year_unknown foundry_unknown}}
+ARM2 microprocessor. This is the first ARM chip which saw mass production, and has a number of improvements over the ARMv1.
+This chip is an early production ARM2 which was found to be faulty and removed from an Acorn Archimedes series workstation.
 ====== Package ======
+PLCC, 84 pins.
 {{:philpem:vlsi-technology:arm2:pack_top.jpg?300|}}
 <code>
+(VLSI logo)
+AV   I8581
+VL2333-QC
+ARM
+ACORN
 </code>
@@ Line 18: / Line 28: @@
 <code>
+ACORN
+AV 005
+ARM2UM
 </code>
+(The chip geometry is reportedly 2um, so "ARM2UM" could simply mean "ARM, 2um")
+Chip contains designer credits:
+<code>
+SBF
+ARW
+JSU
+HEO
+JRS
+DWH
+</code>
+These are the same people as the [[philpem:vlsi-technology:vl86c020|ARM3]]:
+  * SBF: Steve Furber
+  * ARW: Sophie Wilson
+  * JSU: Jamie Urquhart
+  * HEO: Harry Oldham
+  * JRS: Jim Sutton
+  * DWH: Dave Howard
+The only chip art present is the Acorn nut logo at top-right near the layer/diffusion identifiers. The Acorn logo text with slanted A is bottom-centre above the I/O pads, the credits are bottom-right, and the die identifiers are at top left among the I/O pads.
 {{https://siliconprawn.org/map/vlsi-technology/arm2/single/vlsi-technology_arm2_philpem_mz_ms10x.thumb.jpg}}