Tested various micros running this FLOATING POINT program. It derives Pi to 20 decimal places. Interesting stats.

1 N=20: L=INT(10*N/3): DIM A(255): Z$="000000":T$="999999"
2 FOR I=1 TO L: A(I)=2: NEXT I: M=0: P=0: FOR J=1 TO N: Q=0: K=2*L+1
3 FOR I=L TO 1 STEP -1: K=K-2: X=10*A(I)+Q*I: Q=INT(X/K): A(I)=X-Q*K: NEXT I
4 Y =INT(Q/10): A(1)=Q-10*Y: Q=Y: IF Q=9 THEN LET M=M+1: GOTO 7
5 IF Q=10 THEN PRINT STR$(P+1);LEFT$(Z$,M);: P=0: M=0: GOTO 7
6 PRINT STR$(P);LEFT$(T$,M);: P=Q: M=0
7 NEXT J:PRINT STR$(P)

#RC2014 : 14 (thank you JonV)
#BBCMicro : 19
#AmstradCPC : 22 (thank you Devlin)
#AmstradPCW : 23 (thank you Pete)
#AcornElectron : 25
#C128 : 27 (fast mode - thank you Jonas H)
#LuxorABC80 : 29 (thank you Erik)
#SharpMZ700 : 32 (thank you Tim Holyoake)
#VIC20 : 36
#AcornAtom : 37
#AppleII : 38 (thank you Jeroen)
#TRS80CoCo : 42 (thank you Chip)
#Atari800 : 42 (thank you Mark Elliott)
#CBMPET : 43
#C64 : 43
#Dragon32 : 44
#SharpMZ80K : 45 (thank you Tim Holyoake)
#C16 : 46
#Altair8800 : 52
#MSX : 53 (thank you Pixel Purrito)
#C128 : 56 (default "mode")
#ZX80 : 57
#ZXSpectrum : 68 (thank you Adam)
#SharpPC1500A : 167 (thank you Karttu)
#SharpPC1245 : 405 (thank you Karttu)

Edit: now ordered (seconds)

This is a „Tapuino Micro“ running as tape drive on my #cbm3016
I now can put .tap files on a micro-SDcard an load them into this 8 bit computer from 1979!

https://64kb.de/tapuino-micro/

#cbmpet #retrocomputing

A few updates to the hardware project thingy.

Renamed as "Optical Data Channel..." because although vaguely amusing, "JellyLoad" isn't a terribly helpful title.

Also applied MIT open source license, free and easy do-what-you-like-pal whilst absolving me of any liability if you attempt to use the data and end up destroying the universe or something similarly daft.

https://github.com/StefanoGaivota/Optical-Data-Channel-JellyLoad-Hardware

#JellyLoad
#OpticalDataChannel
#RetroComputing
#Commodore
#VIC20
#C64
#CBMPET
#Youtube
#GitHub
#Electronics
#Design

Simulation and prototypes successful, however I currently lack the resources for experimentation beyond this stage, so I'm casting the design out into the open for any and all enthusiasts to pick up and play with.

https://github.com/StefanoGaivota/JellyLoad-Hardware

Feel free to let me know how you get on with it.

#JellyLoad #RetroComputing #VIC20 #C64 #CBMPET #Youtube #GitHub #OpticalDataChannel #Electronics #Design

Attention #commodore #retrocomputing folks!

I found a CBM-II keyboard and a CBM610 (w/o PCB) in my attic (yes, I should go up and dig more often, I suppose 😉 ).

I wonder whether there's a turnkey solution out there to connect it to a PC (using USB). I am aware of Jens Schoenfeld's (iComp) "Keyrah v3". But have the strong feeling I am missing some essential point.

#CBMpet #CBM
#helpneeded #retrogaming

I won't be watching "The Continental" but those that do, look out for the CBM PET #retrocomputer porn that appears.

Core. Sexy.

#CBMPET #Commodore #RetroComputing #RetroComputingPorn

That was a long stressful work day. Please post retro computing porn. Sci-fi / anime computing imagery also welcome.

Here is the gorgeous Commodore Pet.

#RetroComputing #retrocomputer #Commodore #CommodorePET #CBMPET #RetroComputingPorn