deramp5113
Veteran Member
I just realized today that the only copy I've ever seen of the ROMs from the Altair 88-RBM board have at least one modification versus the original ROMs. Does anyone still have this board that could dump the ROMs for me? I want to see what other differences - if any - there may be.
The difference I noticed is that the copyright phrase (Altair ROM BASIC Ver 4.1 Copyright 1977 by MITS Inc.) has been disabled in my copy by changing the leading "A" to a zero which prevents the string from displaying. Of course, that's easy to restore, but I'm curious if other mods have been made. For example, I've noticed in the past that the disk boot loader code is present in the BASIC ROMs at FF00-FFFF. Now I'm curious if that was original or added by the same person who disabled the copyright string.
Mike D
The difference I noticed is that the copyright phrase (Altair ROM BASIC Ver 4.1 Copyright 1977 by MITS Inc.) has been disabled in my copy by changing the leading "A" to a zero which prevents the string from displaying. Of course, that's easy to restore, but I'm curious if other mods have been made. For example, I've noticed in the past that the disk boot loader code is present in the BASIC ROMs at FF00-FFFF. Now I'm curious if that was original or added by the same person who disabled the copyright string.
Mike D