Jos Dreesen 2017 jos.dreesen-at-greenmail.ch

These are straight binary dumps of all ALU and MAS board programmable devices, taken from my functional TEK4052. 

ALU (microcode) release should be V5
MAS (firmware)  release should be V5.1

All dumps here have been read out from at minimum 2 different samples of each ROM.
see checksum.txt formore details.

I also have firmware V4.3 and V4.4, to be read out at a later date.

V5.1 does not use the patch-PLA's at U843 and U863
Strangely enough it also does not use 256-byte PROMS at U805 U897

Both V4.3 and V4.4 use patch-PLA's and Proms at U805

The diagnostic roms are dumps of the 4052 diagnostic rom pack ( 2 X 2716)
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Further notes : 
 - the 4052 will not boot without the tapedrive connected.
 - THE 4052 AND 4052A have different IO board, different MAS board, different microcode and different firmware.
   Seen the scanned document on how to convert a 4052 into a 4052A
   A 4052 does sometimes boot with faulty firmware...