> On Nov 4, 2024, at 12:34 AM, ben via cctalk wrote:
>
> On 2024-11-03 9:37 p.m., Tony Duell via cctalk wrote:
>> On Mon, Nov 4, 2024 at 4:06 AM Mychaela Falconia via cctalk
>> wrote:
>>>
>>> Paul Koning wrote:
>>>
1. Show a one-word PDP-11 program that writes all of memory, in reverse
On 2024-11-04 7:23 a.m., Murray McCullough via cctalk wrote:
A lot happened in the computer industry in early Nov. in the past: Intel's
x86 PC architecture was born; lo & behold Windows ME was released upon the
world; for the corporate in us the IBM Portable Computer was introduced.
The PC world
The other dectape (image below)
1 bit =- 1/8th inch
1 byte = 1 inch
DECtp Tape Measure DEC DIGITAL EQUIPMENT CORPORATION - 1980's - Picture
1 of 5
A lot happened in the computer industry in early Nov. in the past: Intel's
x86 PC architecture was born; lo & behold Windows ME was released upon the
world; for the corporate in us the IBM Portable Computer was introduced.
The PC world hasn't been the same since.
Happy computing,
Murray 🙂
Steve,
from my experience, these "Non-descript" are often the cause for format errors.
Look for high quality disk media like
Dysan 100 5.25 MD2D
2D/2D "BASF"
MD2-DD "Maxell" or
DS,DD from "3M"
In addition, these "Non-descript" disk are most likely pre-formatted by
factory, so Degaussing is rec
Paul Koning wrote:
> On the "one word clear", I missed a detail. I pointed out you get to
> initialize the registers. You can also initiate one memory word. In other
> words: choose two words in memory, and registers contents, such that
> execution will give you a memory full of zeroes and a ha
On Sun, 3 Nov 2024, Steve Lewis via cctalk wrote:
Non-descript 5.25 DS/DD (they don't format as 1.2M disk using a 1.2 5.25"
drive, so I'm pretty sure they are actual 360KB disks). That said, I
haven't really fully confirmed if it's a 1.2M drive. TEAC FD-55GFR
142-U, because I haven't actuall
haven't really fully confirmed if it's a 1.2M drive. TEAC FD-55GFR
142-U, because I haven't actually come across any 1.2M formatted media.
Teac FD-55GFR is a 1.2M drive that can also be used as a 720K 5.25" drive.
(FD-55G is 1.2M; FD-55F is 720K)
On Mon, 4 Nov 2024, Chuck Guzis via cctalk wr
The prototype of the Altair 8800 was completed in Oct 1974 and was
announced in Jan 1975.
On Mon, Nov 4, 2024 at 10:01 AM Murray McCullough via cctalk
wrote:
>
> A lot happened in the computer industry in early Nov. in the past: Intel's
> x86 PC architecture was born; lo & behold Windows ME was r
> On Nov 4, 2024, at 12:15 PM, Mychaela Falconia wrote:
>
> Paul Koning wrote:
>
>> On the "one word clear", I missed a detail. I pointed out you get to
>> initialize the registers. You can also initiate one memory word. In other
>> words: choose two words in memory, and registers contents
Non-descript 5.25 DS/DD (they don't format as 1.2M disk using a 1.2 5.25"
drive, so I'm pretty sure they are actual 360KB disks). That said, I
On Mon, 4 Nov 2024, osi.superboard via cctalk wrote:
from my experience, these "Non-descript" are often the cause for format
errors. Look for high q
On Mon, 4 Nov 2024, Bill Gunshannon via cctalk wrote:
I used Elephant. Still have piles of them and they are all still
readable (and probably writable but I don't want to lose the data
they hold.)
SOME batches of Elephant were quite good.
The biggest laugh I ever had was when we complained a
On 11/4/2024 1:38 PM, Fred Cisin via cctalk wrote:
Non-descript 5.25 DS/DD (they don't format as 1.2M disk using a 1.2
5.25"
drive, so I'm pretty sure they are actual 360KB disks). That said, I
On Mon, 4 Nov 2024, osi.superboard via cctalk wrote:
from my experience, these "Non-descript"
not wrong, but in my benchmarks, the order of how long it took to clear out a
255 byte area exactly reversed between the 370/168 and 3033. I hope I remember
all the ways, not sure if I remember the order, or the exact syntax. Not
included are the 'costs' of storage required for code and data a
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