Search found 14 matches

by AlanW
Sat Jun 20, 2020 8:46 pm
Forum: Usage tips, tricks and problem reports
Topic: Need help programming with RPN
Replies: 5
Views: 489

Re: Need help programming with RPN

I have vague memories of this problem in games (but not on a calculator). This should give the general idea, but is not a fully worked solution. A: If the pixel can only move less than 8 pixels per frame relative to the box, it is sufficient to just check that the pixel is inside the box The pixel c...
by AlanW
Tue Jun 09, 2020 7:42 pm
Forum: DM1x/DM1xL
Topic: [DM15] Aeronautical Calculations
Replies: 13
Views: 1100

Re: [DM15] Aeronautical Calculations

Verification check of program. Data from BS2G199:1984 Table 4 Height (ft) CAS (kts) M TAS (kts) 0 150 0.2268 150.00 0 300 0.4535 300.00 0 600 0.9071 600.00 0 875 1.3228 875.00 20000 150 0.3321 204.00 20000 300 0.6513 400.10 20000 600 1.2421 763.05 20000 875 1.8474 1134.86 40000 150 0.5134 294.47 400...
by AlanW
Wed Jun 03, 2020 11:09 am
Forum: DM42
Topic: DM42 file read/write
Replies: 7
Views: 595

Re: DM42 file read/write

I think the DM42 can print to a file. From the manual … Printing to File Since DM42 3.10 in addition to default IR printing user can choose printing to file. This functionality can be activated in Printing menu. Two output formats are supported: Graphics Print Creates bitmap (.bmp) file with printed...
by AlanW
Thu May 28, 2020 7:28 pm
Forum: DM42
Topic: My DM42 Is lost
Replies: 38
Views: 4300

Re: My DM42 Is lost

And I received today my classic boards from teenix, after a 70 days trip from Australia. :? The teenix website was interesting, particular the Hp-65 board. My Dad brought an HP-65 home from work when I was a youngster. It was awesome, particularly all the magnetic card packs. I remember you ran the...
by AlanW
Thu May 28, 2020 10:58 am
Forum: DM42
Topic: My DM42 Is lost
Replies: 38
Views: 4300

Re: My DM42 Is lost

My new DM42 just arrived in the UK 5 working days after being shipped - the postal service in Europe appears to be recovering ;)

All the keys are working well. Shift key looks a nice solid yellow. S/N 05171. Time to read the manual(s).

Alan
by AlanW
Fri May 22, 2020 4:16 pm
Forum: Firmware updates
Topic: Do not use Firmware V30 for DM1x/41
Replies: 10
Views: 1176

Re: Do not use Firmware V30 for DM1x/41

That explains why I have had to replace the battery of my new dm15L after about 2 months, and when powered on the low battery indicator was on and the display blanked shortly after each key press. E+ON gave a battery reading of zero, and shortly afterwards the calculator went into a deep sleep, only...
by AlanW
Thu May 21, 2020 11:10 am
Forum: DM1x/DM1xL
Topic: [DM15] Aeronautical Calculations
Replies: 13
Views: 1100

Re: [DM15] Aeronautical Calculations

All errors identified to date have now been corrected in the original post (including the description in the hp15c simulator save file)

Alan
by AlanW
Thu May 21, 2020 6:44 am
Forum: DM1x/DM1xL
Topic: [DM15] Aeronautical Calculations
Replies: 13
Views: 1100

Re: [DM15] Aeronautical Calculations

Conversion between True Airspeed, (TAS), Computed Airspeed (CAS) and Mach Number (M) for a given Altitude in .... Although CAS is a computed airspeed, CAS denotes "Calibrated Airspeed". BTW TAS is a computed airspeed also. Günter I agree and will change 'Computed' to 'Calibrated' 'Computed Air Spee...
by AlanW
Tue May 19, 2020 9:46 pm
Forum: DM1x/DM1xL
Topic: [DM15] Aeronautical Calculations
Replies: 13
Views: 1100

Re: [DM15] Aeronautical Calculations

Thanks for pointing out that it should be mbar rather than mb.
The licence is based on the BSD License which is from the US, while I'm from the UK.

Alan
by AlanW
Tue May 19, 2020 9:27 pm
Forum: DM1x/DM1xL
Topic: [DM15] Aeronautical Calculations
Replies: 13
Views: 1100

Re: [DM15] Aeronautical Calculations

Errata: It's BS2G199:1984 not BS2G100:1984.