From: William Levak (wlevak_at_cyberspace.org)
Date: 2002-08-08 01:16:00
The 1551 schematics by Jerzy Sobola show a 6525A at position U3. The
other schematic on funet shows a 6523A at this position.
It may be possible to use a 6525 as a substitute for a 6523, but there is
no way to tell from the schematics.
I have compiled a list of 1551 parts from these two schematics:
------------------------------------------------------------------------------
1551 Parts
Location Part Number Description
U4 318008-01 23128 16K ROM DOS 2.6 C000-FFFF
U5 6116 2K Static RAM
U6 HD61J215P 42 pin Gate Array
U7 251829-01 64H157 20 pin Gate Array
U2 6510T CPU
U3 6523A/6525A Tri-Port Interface
U11 251853-01 R/W Hybrid
Interface Cartridge:
U2 6523 Tri-Port Interface
U1 251641-03 82S100 Programmed Logic Array
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