Image Map Image Map
  • Dwight Elvey's Avatar
    November 15th, 2017, 09:26 PM
    It was more the blindness to see what was possible and how soon it might happen. Moore's law could be applied to a lot of things. Dwight
    50 replies | 1463 view(s)
  • Dwight Elvey's Avatar
    November 14th, 2017, 01:25 PM
    As I recall, CP/M always used 128 byte buffers and used a de-blocking interface for other sector sizes. At least that is what I recall. I also...
    50 replies | 1463 view(s)
  • Dwight Elvey's Avatar
    November 13th, 2017, 04:22 PM
    Dwight Elvey started a thread Canon floppy drives in Other
    Hi All Did Canon buy there head assemblies from one of the other disk manufactures, for 3.5 in drives, or did they make there own heads. In the...
    0 replies | 81 view(s)
  • Dwight Elvey's Avatar
    November 13th, 2017, 04:00 PM
    Current day micro processors are static in the sense that the flops are made of static latches. They often have to be treated as dynamic because of...
    12 replies | 327 view(s)
  • Dwight Elvey's Avatar
    November 13th, 2017, 03:54 PM
    Dwight Elvey replied to a thread What's a millimeter? in Rants
    When at home I use a chromebook. It is not a computer. At work I use redhat and firefox. It works well enough. Dwight
    64 replies | 1627 view(s)
  • Dwight Elvey's Avatar
    November 13th, 2017, 09:53 AM
    Dwight Elvey replied to a thread What's a millimeter? in Rants
    I never claimed to be a good speller. Dwight
    64 replies | 1627 view(s)
  • Dwight Elvey's Avatar
    November 13th, 2017, 07:34 AM
    Dwight Elvey replied to a thread What's a millimeter? in Rants
    Actually it is not sanded, it is plained. Even though, most people don't understand something, that doesn't mean they can sue over their lack of...
    64 replies | 1627 view(s)
  • Dwight Elvey's Avatar
    November 12th, 2017, 07:04 AM
    Dwight Elvey replied to a thread What's a millimeter? in Rants
    One would have to be silly to try such a suit. It would be like trying to sue over the price of 5 penny nails. Anyway, when buying wood, you are...
    64 replies | 1627 view(s)
  • Dwight Elvey's Avatar
    November 12th, 2017, 06:55 AM
    Don't confuse Nyquist with digital oscilloscope sampling frequencies. Digital signals are composed of a lot of harmonics. Looking at a 10MHz digital...
    43 replies | 3367 view(s)
  • Dwight Elvey's Avatar
    November 10th, 2017, 01:47 PM
    Dwight Elvey replied to a thread What's a millimeter? in Rants
    I suspect with their setup to measure gravity waves, they are close enough for the numbers I gave. Dwight
    64 replies | 1627 view(s)
  • Dwight Elvey's Avatar
    November 10th, 2017, 01:42 PM
    The worst part about that is that it is desired for the cars to talk to each other. You can imagine moving down the freeway at 70 miles per hour and...
    19 replies | 519 view(s)
  • Dwight Elvey's Avatar
    November 10th, 2017, 11:52 AM
    There is no question that they are currently safer than the average drive. That isn't saying much. A high percentage drive drunk or otherwise...
    19 replies | 519 view(s)
  • Dwight Elvey's Avatar
    November 10th, 2017, 11:42 AM
    Dwight Elvey replied to a thread What's a millimeter? in Rants
    ( radar mile ) I had to look that up. One place said it was 10.8 milliseconds but most agree it is about 10.8 us. Just for curiosity I ran the...
    64 replies | 1627 view(s)
  • Dwight Elvey's Avatar
    November 10th, 2017, 11:02 AM
    I suppose we mostly all heard of the self driving shuttle bus accident that happened 40 minutes after it first was started. It was credited as the...
    19 replies | 519 view(s)
  • Dwight Elvey's Avatar
    November 10th, 2017, 10:34 AM
    My Nicolet 1080 has what I think is a SA-915 but could be a SA900. What is unusual is that it has a 50 pin SA connector and a small adapter board to...
    6 replies | 207 view(s)
  • Dwight Elvey's Avatar
    November 9th, 2017, 08:48 PM
    Dwight Elvey replied to a thread What's a millimeter? in Rants
    For some things, fractional sizes make more sense than decimal. Metric hardware is a mess to deal with. There is no smooth transition between...
    64 replies | 1627 view(s)
  • Dwight Elvey's Avatar
    November 9th, 2017, 08:40 PM
    Dwight Elvey replied to a thread What's a millimeter? in Rants
    A nautical mile is no worse or better than a meter. Both are based on a north/south distance. It is degrees and minutes but then the second is 1/60...
    64 replies | 1627 view(s)
  • Dwight Elvey's Avatar
    November 9th, 2017, 01:18 PM
    Dwight Elvey replied to a thread What's a millimeter? in Rants
    That is already a museum piece. a meter ( metre ) is curently: 1579800.762042(33) wavelengths of helium–neon laser light in vacuum Dwight
    64 replies | 1627 view(s)
  • Dwight Elvey's Avatar
    November 9th, 2017, 12:22 PM
    Dwight Elvey replied to a thread What's a millimeter? in Rants
    Of interest, the weight had been connected to a physical artifact. It was the last such artifact that was kept that was not connected to some...
    64 replies | 1627 view(s)
  • Dwight Elvey's Avatar
    November 9th, 2017, 09:10 AM
    Dwight Elvey replied to a thread What's a millimeter? in Rants
    It looks like he measured, using a metric ruler, thinking it was inches and not being able to multiply by 2.54, multiplied by 3 ( close enough? )....
    64 replies | 1627 view(s)
  • Dwight Elvey's Avatar
    November 9th, 2017, 06:23 AM
    There was often a separate piece that when under the socket to isolate the socket from the board below. It was like a special socket for the textool...
    6 replies | 370 view(s)
  • Dwight Elvey's Avatar
    November 8th, 2017, 06:56 AM
    Dwight Elvey replied to a thread Poly 88 case in S-100
    Hi I'm afraid you know as much about the expansion as I do. Polymorphic went on to make the System88. I believe you are right that it was intended...
    13 replies | 442 view(s)
  • Dwight Elvey's Avatar
    November 7th, 2017, 09:18 PM
    Dwight Elvey replied to a thread Poly 88 case in S-100
    I think its claim to fame was the single button reset and no hardware front panel. The monitor in ROM was quite good. Since the video was memory...
    13 replies | 442 view(s)
  • Dwight Elvey's Avatar
    November 7th, 2017, 06:05 AM
    I walk away from such auctions. Never bid more than you will pay. Dwight
    23 replies | 886 view(s)
  • Dwight Elvey's Avatar
    November 6th, 2017, 10:40 PM
    As we mentioned in another thread, the Poly88 CPU board has RAM, ROM and a USART ( it would need a TTL to RS232 level shifter ). The ROM is only 3K...
    11 replies | 365 view(s)
  • Dwight Elvey's Avatar
    November 6th, 2017, 10:25 PM
    Dwight Elvey replied to a thread Poly 88 case in S-100
    It was also a single reset button machine. It had a monitor in ROM rather than switches. The cassette interface wasn't on the CPU, only the USART...
    13 replies | 442 view(s)
  • Dwight Elvey's Avatar
    November 6th, 2017, 05:55 PM
    Dwight Elvey replied to a thread Poly 88 case in S-100
    Video boards are more common than CPU cards as they had early graphics and were memory based. The video board could also take a parallel keyboard,...
    13 replies | 442 view(s)
  • Dwight Elvey's Avatar
    November 6th, 2017, 07:53 AM
    Not good so deleted
    8 replies | 299 view(s)
  • Dwight Elvey's Avatar
    November 6th, 2017, 07:07 AM
    It would seem that the biggest issue with any of the current thinking is a serious lack of being able to proving correctness of the code and in some...
    26 replies | 690 view(s)
  • Dwight Elvey's Avatar
    November 4th, 2017, 02:16 PM
    Dwight Elvey replied to a thread C65 in eBay...OMG! in Commodore
    I think the real issue is learning where you should be using integer math and where you should be using floating point. I've seen too many times...
    78 replies | 2944 view(s)
More Activity
About Dwight Elvey

Basic Information

About Dwight Elvey
Location:
Santa Cruz
Interests:
Computers, radios, pinball
Occupation:
Elect Engr

Statistics


Total Posts
Total Posts
1,547
Posts Per Day
0.29
General Information
Last Activity
Yesterday 10:01 PM
Join Date
June 20th, 2003
Referrals
0