10 Aug
2012
10 Aug
'12
7:51 p.m.
On 8/10/12 7:27 PM, David Riley wrote:
On Aug 10, 2012, at 20:57, Al Kossow<aek at
bitsavers.org> wrote:
The memory manager was designed in the days of the 128k Mac. It is really awkward to deal
with anything
larger than 64k. This is a big problem for large programs. Code segments can't be
bigger than 64k. Back
porting large programs is very, very difficult. It is a shame that they essentially took a
non-segmented
CPU, and made it segmented. That all got fixed with the native PPC runtime and it made
life much easier.
On 8/10/12 5:23 PM, Paul Anderson wrote:
I'm actually very curious to hear details about that, if you have the time. What
kind of issues?
Hercules should work:
http://www.hercules-390.org/
> Is there a 360/70 simulator that will run on
68K Macs?
Doubtful. We fixed a lot of problems with memory management when Apple
went to PowerPC. The 68K runtime has major problems dealing with large
chunks of memory.
Running a big simulation on MacOS 68K is a chore.