Hyperion Multi-Booter For Ti-68k - Page 1

The idea behind the hyperion multi-booter program is that it is a tsr program that allows someone to have both the Ti-Os and Pedrom or any other operating system that comes along in the future.

It uses the same basic system and features as the GNU Grub Multi-booter for Redhat Linux / Fedora Core (1, 2, 3, 4)

Some of the projected features will include

-A GUI for OS choosing
-An optional password protection
-Up to 3 Operating Systems at one time installed (if memory permits)
-And much more...

I need to know if anyone would be interested in this program...

Before knowing if such a program would be useful...
Is it really something that can be done ?
(for instance, a TSR needs AMS - or any other OS - to work... It can work _before_ the OS is launched, I think)

BTW, I'm wondering if ExtendeD did not create something to use PedRom on a calculator without deleting AMS...
Hu, I can find it on ticalc... maybe I'm wrong, actually

je suppose que:

squale92 :
(for instance, a TSR needs AMS - or any other OS - to work... It can't work _before_ the OS is launched, I think)

heu, yes, naturally
(I should re-read before sending... but I almost never do so )

Well the "hack" done by ExtendeD (if I remember well it's ExtendeD, else, I'm sorry for the real developper) that leads to PedRhum is enough for me, but why not, that may by fun, but I will not say that it may be usefull (as PedRom has just one point good : the amout of free mem... if two OS are installed, PedRom has no interest, on my opinion)

Il reste quand même l'avantage de disposer de plus de ram.

Ben... c'est pas dit... vu que la RAM allouée pour AMS sera verrouillée pour pedROm (ou alors on est mort... on n'est pas sur un PC, le "disque" c'est la RAM !)

pourquoi pas juste swappée en flash ?

Ca serait bien lourd à gérer. Si t'as 170ko en ram, i lfaut les copier en flash avant le boot, puis les restaurer... Or la flash TI n'est pas la plus rapide du monde...

Raziel> Hi, this looks interesting, but you didn't mention how you handled the most important points (password protection and GUI are, imho, secondary) : would you have to reset the whole RAM to switch operating systems? How does it compare to Pedrhum?

Nil :
as PedRom has just one point good : the amout of free mem... if two OS are installed, PedRom has no interest, on my opinion

Well, currently it's sort of a chicken-and-egg problem: nobody wants to develop on pedrom, because few people have it, because you have to sacrifice the math functions. If you could get AMS and Pedrom to smoothly cooperate (e.g. be able to use the AMS CAS in Pedrom -- though that would be a HUGE undertaking, due to the ton of internal variables that AMS uses), then people might be more interested in Pedrom development, and in return bring unique features to Pedrom. Although I must admit that apart from extra RAM and the ability to run from Flash (although this can be worked around if you are willing to take the risk of unprotecting the flash, or simply to have your app signed), I can't think of anything that Pedrom could do that AMS can't... Maybe extra speed [e.g. faster heap management], or stuff like reentrancy? But it's true that at the moment, there's nothing compelling apart from extra ROM/RAM

Heu... rassurez moi :
c irréalisable comme truc hein ?
Rien que par le fait que AMS a des adresses absolues il me semble (corrigez moi si je me trompe )

AMS serait à l'adresse de base je suppose, alors que pedrom serait modifié pour être à une adresse différente ^^

arf vi j'y avait pas pensé
escusez mon interruption alors ^^

on attend les plans de ton montage

ouais en fait tu l'avais compressé dans un fichier qui s'appelle keylogger.exe et t'as détruit l'original ^^

Nil>bah... y a 64Ko à tout casser. Ca prend 30s à archiver dans le pire des cas.

Oui, mais tu fais quoi des variables que tu peux créer sous AMS ?

Il les voit mais ne peut pas les modifier.

pas une bonne solution.. Si en plus faut sauver la ram AMS et la ram de pedrom a chaque switch d'os.. Déjà on va
3 fois plus vites bousiller la flash (et oui c'est pas éternel) et il ne va vite plus rien rester en flash de dispo pour l'utilisateur.. (sauf a la limite sur V200 et 89Ti mais bon)

Et comme le dit pollux (#13) dans Pedrhum, le fichier de 64Ko de pedrom est mis a la suite d'AMS en flash rom

By the way, WHY clone a grub like shell ? It's surely a good thing for PC like system (even if only x86 PC can use it) but for handheld system like the TI's one, it's (for me) not a good thing. No one need a shell bootloader, It will be too large for the purpose. A simple one which can just allow to select the OS is enought (and GRUB is not a redhat only feature by the way)

Indeed, there's already Pedrhum...

Yes, but only for pedrom. Make an universal bootloader won't be a bad idea

Well, there is a single usable third-party OS (PedroM), although the current version has annoying bugs such as that of strncpy. Therefore, an universal bootloader is quite pointless for the time being.
Not to mention that it takes space per se, especially if OS makers decide that it should be up to the bootloader to try to make their OSs compatible with standard AMS (Pedrhum's modifications to PedroM are not trivial pieces of code) - if they want to, obviously.

The only problem of PedRhum is that (if I remember well) it is built based on a deprecated version of PedRom, no ?

Yes... And since pedrom isn't easily relocatable, making a pedrhum version of is a lot of work..

why isn't it easily relocatable ?