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A memo circulated inside Tandy outlining the Model 3 and 4 ROMs.


ROM A:

Checksum
Part
No.
Code
Name
Description
9639
8041364
M3A
Model III and first production US and English Model 4
8F65
8048364
M4A
Model 4 international may be used on all versions of Model 4 but must be used on French, German, and Educational versions.

ROM B:

Checksum
Part
No.
Code
Name
Description
407C
8040332
M3L2B
For all Model III’s and 4’s

Intermediate ROM C when used with M3A:

Checksum
Part
No.
Code
Name
Description
1591
8048316
M4CUI6
Intermediate U.S. (60hz)
158C
8049006
M4CEI7
Intermediate English (50hz)

ROM C when used with M4A:

Checksum
Part
No.
Code
Name
Description
488C
8042316
M4CUS6
U.S. including Education (60hz)
48AA
8049005
M4CEN5
English (50hz)
3080
8049004
M4CGR5
German (Must be used with 8049007 character generator)
43AD
8049003
M4CFR5
French (Must be used with 8049007 character generator)

Character Generators:

Checksum
Part
No.
Code
Name
Description
19B9
8044316A
M3/4
For U.S. and Kana
4A0E
8049007
M4I
For U.S. and Europe (All Model 4’s)