RLC-3 Software Chip Changes

The following table records which versions of each eprom work 
together.  When a new version is released, only the eproms that 
change are assigned the new version number.  That way it is 
obvious which chips have changed and which have not.  The version 
is always designated by the highest version number of any of the 
eproms.  For example, V1.53 uses V1.53 for eprom1 and eprom2, 
V1.41 for eprom4, and V1.45 for the radio cards. 

Version     Eprom1      Eprom2      Eprom3      Eprom4          Cards
---------------------------------------------------------------------
1.00        1.00        1.00                                    1.00
1.10        1.10        1.00                                    1.10
1.11        1.11        1.00                                    1.11
1.12        1.12        1.00                                    1.12
1.15        1.15        1.00                                    1.12
1.20        1.20        1.00                                    1.12
1.21        1.21        1.00                                    1.12
1.22        1.22        1.00                                    1.12
1.23        1.23        1.00                                    1.12
1.25        1.25        1.00                                    1.12
1.27        1.25        1.00                                    1.27(1)
1.28        1.28        1.28                    1.00 eprom 2    1.27
1.30        1.30        1.30                    1.00 eprom 2    1.30(2)
1.32        1.32        1.32                    1.32(3)         1.30
1.33        1.32        1.32                    1.32            1.33
1.34        1.34        1.34                    1.32            1.34
1.36        1.36        1.36                    1.32            1.34
1.37        1.37        1.37                    1.32            1.34
1.38        1.38        1.38                    1.32            1.34
1.40(4)     1.40        1.40                    1.40            1.34
1.41        1.41        1.41                    1.41            1.34
1.42        1.42        1.42                    1.41            1.34
1.44        1.44        1.44                    1.41            1.34
1.45                                                            1.45(5)
1.46        1.46        1.46                    1.41            1.45
1.48        1.48        1.48                    1.41            1.45
1.53        1.53        1.53                    1.41            1.45
1.63        1.63        1.63                    1.41            1.45
1.64        1.64        1.64                    1.41            1.45
1.65        1.65        1.65                    1.41            1.45
1.66        1.66        1.66                    1.41            1.45
1.67        1.67        1.67                    1.41            1.45
1.70        1.70        1.70                    1.41            1.45
1.71        1.71        1.71                    1.41            1.45
1.72        1.72        1.72                    1.41            1.45
1.73        1.73        1.73                    1.41            1.45
1.74        1.74        1.74                    1.41            1.45
1.76        1.76        1.76                    1.41            1.45
1.77        1.77        1.77                    1.41            1.45
1.78        1.78        1.78                    1.41            1.45
1.78b       1.78b       1.78b                   1.41            1.45
1.79        1.79        1.79                    1.41            1.45

Notes:

-->  In several cases the voice eprom label was changed to match 
     the program eproms even if the data in it did not change.  
     The V1.00 voice eprom could have been labeled anything from 
     V1.00 to V.131. This was also true of card eproms. 

(1)  V1.27 eproms were completely compatible with 1.12 eproms, 
     but had a bigger event queue. 

(2)  V1.30 main eproms also worked with V1.12 and V1.27 card 
     eproms, but without the debouncing feature of the V1.30 card 
     eproms.  V1.30 card eproms would not work with earlier main 
     eproms. 

(3)  The V1.00 voice eprom still worked in versions that expected 
     V1.32 because all of the old words were still in the same 
     locations.  However the 65 new words that were added in the 
     V1.32 voice eprom obviously wouldn't work. 

(4)  V1.40 never worked right - the voice word vector was wrong.

(5)  V1.45 card eproms are completely compatible with V1.34 card 
     eproms, but have smaller queues.  In V1.34 the stack would 
     occasionally hammer the access mode and dial tone variables.  
     Reducing the queue sizes to increase the space available for 
     the stack solved this problem.