Re: Where's the CPM files
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Allison,??
Lee's ALTAID computer uses a 512K RAM chip, 64K for a full memory map and 448K for a single RAM disk. It's fast to access the disk, but the 8080 itself is just chugging along at 2Mhz.
Somethings never change.? I'm guessing in 4 decades from now, it will be the same (if humanity survives). Even back on my XT (or was it on my AT?) I would create RAM Disks and work from them. Today, everyone installs SSD to speed up Windows.
Cheers,
Josh
On Wednesday, September 30, 2020, 10:30:53 a.m. EDT, ajparent1/kb1gmx <kb1gmx@...> wrote:
I've collected and build CP/M systems for decades (over 4)
so I have system that run from sludge slow to current idea of fast.
Z80s at 10mhz, Z180s at 12mhz and A Z280 at 10mhz.
That and no shortage of S100, Multibus, and SBC systems
to run.
Biggest bottleneck is mass storage IO, 5.25 floppy generally
is slow, many hard disks were not fast.? ?Of all CF is usually
fastest (best if 8bit mode) and SD slower as the SD has
more protocol overhead and the serializing if not done in
hardware is slow.? Of course there are implementation
dependencies but the faster?systems usually farm out
the disk/storage IO to a slave cpu in some form.??
Speed is good if it can be had simply.? A Z80 running at? 6, 8
or 10mhz can be simple.?
All that said why speed is nice to have, I use multiplan, Dbase,
smallC, BDS-C, Pascal and a lot of other software like Vedit
and speed helps.
Allison
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