Close

A new ROM layout generation script

A project log for Numitron Hexadecimal display module

Another hexadecimal display, this one is sans transistor for the extra vintage touch, and uses only Soviet-era parts

Yann Guidon / YGDESYann Guidon / YGDES 10/30/2017 at 17:280 Comments

I have just uploaded convo7seg_09.html which computes the ROM configuration from the updated digits.

As I wrote in a previous log, the lines 5 and 6 must be swapped, or the output is totally messy. The swap must be integrated in the initial array, not at the line drivers level. This new script confirms the configuration that is implemented in the 2nd prototype.

Here is the output :

...v^v.v.....v  0/8
......^..v^.^.  X4
..............  1/9  <- empty line :-)

^.^.....^..v..  X2

.....v....^.^.  2/A
.v..^..v.....v  X4
......^..v....  3/b

...........v..  4/C
.v^v..^.....^.  X4
^....v.v.....v  5(6)/E

....^....v....  X2

.v.v..^v^.^...  6(5)/d
^............v  X4
..^........v^.  7/F

Total: 45 diodes

Discussions