k Ramdisk (48k RAM + 16k RD or 32k RAM + 32k RD) ?!?
– … ————————————————————————— B) Atari XL/XE Ramdisks: Name Vendor Size Area Bits Port Banks Notes => Note that bit 4 is always used in all Port B type memory upgrades to turn on the CPU’s access to the extended memory. Thus, it is not reported in bit use tables as a used bit as it does not control which bank gets switched into the 4000-7FFF region. This seems to be a standard convention as the majority of ramdisk users don’t want bit 4 counted as a control bit. And it’s not a control bit – its the ‘on’ bit. Likewise, bit 5 is the ‘on’ bit for ANTIC’s access to the extended memory for ‘compatible’ (to 130XE) machines as well. If bit 5 does show up in a bit use table, one can only assume that this is an incompatible machine which doesn’t have or use ANTIC access at all.
