5 ms·
>Only applicable to CHIP RAM. CPU could access FAST RAM, the default allocation target, all the time. "default" haha. Afaik the only Amiga that ever shipping w
by rasz 4y ago
>Only applicable to CHIP RAM. CPU could access FAST RAM, the default allocation target, all the time.
"default" haha. Afaik the only Amiga that ever shipping with fast ram was A4000. It was introduced at $4600 in 1992. In 1993 it was down to $2500, same price ARL was selling Pentium 60MHz system with 8MB ram.
- snvzz 4y ago>"default" haha. Yes, default. AmigaOS AllocMem() will use fast32, then fast, then slow, then chip. Thus software needs to request Chip explicitly when required. This is fortunately well respected by software, thanks to "slow ram" being commonly mounted inside Amiga 500's trapdoor. >Afaik the only Amiga that ever shipping with fast ram was A4000 A3000 already shipped with a 1M+1M CHIP/FAST split in 1991. For the other Amiga, fast ram is a priority expansion. Typically over 2x performance for the A1200's CPU just from having any, via trapdoor expansion slot. On A500, the most sold model, you'd get this through the left expansion slot, either as a standalone board or mounted inside an HDD adapter, back in the day. Today, A500 CPU socket adapters giving 8MB Fast RAM are common.
- deleted 4y ago[deleted]