Page 2 of 2
Re: maprom 1.8 working on TT
Posted: 23 Feb 2021 20:25
by stephen_usher
Both maprom and romspeed do the same thing. They take a copy of the ROM, put it into TT-RAM and then change the 68030 MMU translation tables so that the RAM copy maps to the ROM address. It's as simple as that.
Re: maprom 1.8 working on TT
Posted: 23 Feb 2021 21:28
by Steve
@stephen_usher yes but going by the results in this thread it seems they do certain things differently due to the massive speed increase the TT has for romspeed Vs maprom.
Re: maprom 1.8 working on TT
Posted: 24 Feb 2021 03:36
by thorsten.otto
Steve wrote: 23 Feb 2021 21:28
@stephen_usher yes but going by the results in this thread it seems they do certain things differently due to the massive speed increase the TT has for romspeed Vs maprom.
Could be that maprom marks the mirrored ROM as non-cacheable?
Re: maprom 1.8 working on TT
Posted: 24 Feb 2021 19:48
by stephen_usher
Actually, I think the latest version of maprom does turn off the cache due to issues of some kind I can't remember. I recompiled it without that restriction.