kvp#76
"Minden fontosabb dolog a ROM-ban volt! A kernel, a library-k nagy része, stb.A floppykon (vagy a vinyón) csak a körítés volt, és a WORKBENCH. Beteszel egy bootolható üres lemezt, és megjelenik egy mozgatható screenen egy ablakban a CLI!"
Ami a kickrom-ban volt: kernel, driverek, grafikus alrendszer szervere, diszk alrendszer. Gyakorlatilag kb. a linuxos initrd tartalma, ami bar az os resze, de nem jelent teljes kornyezetet. A bootolhato floppy pedig tobbnyire egy minimalis os-t tartalmaz, meg ha az csak annyibol is all, hogy: parancs beolvasasa, vegrehajtasa. Az amigaknak mindenkeppen kellett valamilyen kulso tarolo, ahhoz hogy a floppy-t tarto kez eltunjon es a gep mukodni kezdjen. Ezt lehetett egy plusz rom chippel kikerulni, ami az os hianyzo reszeit tarolta, minimalis esetben a cli inditasat. (ennek felel meg linuxon az init folyamat)
Ami nem volt a rom-ban: a workbench, a teljes karakteres shell, es a programok
Az operacios rendszer nem csak a kernelbol all. Ebbol a szempontbol az ibm dos rom-os valtozata is hasonlo volt, mert bar sokkal kevesebbet, de azt tenyleg lemez nelkul tudta. A megoldas hasonlo volt, ott is egy romdisk-et hasznalt a gep a programok tarolasara, csak az ibmdos.com es az iosys.com melle odatettek a command.com-ot is, hogy teljeserteku legyen a rendszer es lemez nelkul is el tudjon indulni. Igazabol nem tudom az amiga 1.3-as kickrom /A500 gyari rom/ miert nem dobott fel legalabb egy boot menut... (kesobb ezt megoldottak)
Egy jo hosszu idezet, ami nallam jobban leirja a helyzetet:
The Commodore Amiga line of computers were known for their superior (at the time) graphics and sound and a highly integrated GUI that was ahead of its time, but they had one nagging attribute that made them less accessible and less hackable than the Commodore computers that had come before them: They all required a disk to boot. Unlike the Commodore 64 (and even earlier Commodore machines that predated the C64, like the PET and VIC-20), a diskless Amiga would not boot to a BASIC interface built into ROM. Rather, most Amigas would simply display an image asking you to insert a disk containing Workbench, the standard GUI environment for the Amiga. Although you didn't specifically need a Workbench disk (many programs other than Workbench can be placed in the drive and booted when this screen appears), the point is that an Amiga is basically useless without a disk.
The Amiga 1000, however--the very first Amiga model made--was even more disk-reliant than its later cousins, as it required not one but two floppy disks to boot. The second disk was Workbench, but the first disk required was Kickstart, the name of what is, essentially, the Amiga's ROM BIOS code. The Amiga 1000 was made to load its BIOS off a floppy disk rather than from ROM, and so it contains very little internal ROM code except that needed to read a floppy. This was done so that the Amiga's BIOS could be easily upgraded without having to physically swap out the ROM chip (this was in the days before Flash or EEPROM memory upgrades were widely available). While this opens up certain interesting possibilities for hackers, as it means you can literally rewrite the machine's BIOS and easily load it off a floppy disk, this also means that if you have an Amiga 1000 sitting around that you want to use, you're basically stuck unless you can provide a floppy containing some bootable Amiga code.
ps: Aki csak uae-ben latott amigat, az nem tudja mennyi hackelest igenyelt az, hogy jatszani lehessen rajta az ujabb jatekokkal. Az utolso jatekok amiket meg amigan jatszottam vegig, az az eob 1 es a settlers 1 volt. Az egyik kedvencem meg a lasersquad.