Indy custom PROM

[Noguri]

One year ago or so I made a decompilation of the Indy PROM.
From that point it wasn't too difficult to figure out how to modify boot colors, fonts, logos, cursors and tunes (among others). The coolest part probably being that with a little extra effort, it was possible to extend the startup tune to roughtly 3.5 seconds instead of the original 2 seconds.

It was now time to test a modified PROM file with a real Indy... And it actually worked.
Hereunder is a screen capture of a custom boot screen example but like I said, the "coolest" part IMO is the possibility to change the tunes. Therefore I enclosed a small video in attached file (file is zipped because it wasn' possible to attach direct video file). Be sure to have volume turned on

PS: don't judge my artistic skills please

 

[Linux-RISC]

How have you flashed the modified PROM ?

 

[Noguri]

Hi Linux-RISC,

This is probably the most straightforward part of the process and you can follow this tutorial there for instance.
As I am not using the same ISP programmer, I cannot provide any feedback though. In particular, the byte swapping part is natively taken care by my ISP programmer (a DataMan 40PRO, totally overkill for the task..)

One piece of advice:
If you buy second hand EEPROMs, be sure to buy a bunch of them to have at least one working. They are extremely cheap anyway.

 

[Linux-RISC]

Uhmm.. I thought there was a way to show a temporary background on boot.