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)
#AcornElectron : 25
#C128 : 27 (fast mode - thank you Jonas H)
#VIC20 : 36
#AcornAtom : 37
#CBMPET : 43
#C64 : 43
#Dragon32 : 44
#C16 : 46
#Altair8800 : 52
#MSX : 53 (thank you Pixel Purrito)
#C128 : 56 (default "mode")
#ZX80 : 57
#ZXSpectrum : 68 (thank you Adam)

Edit: now ordered (seconds)

I think I have a problem.

whats that? addicted to collecting old computers?

dinnae be daft, I mean where do I put this atari ST I got the other day.

im running outta wall space.

#retrocomputing #retro_gaming #atari #commodore #amiga #dragon32 #zxspectrum #spectrumnext #atarist

The expanding range of #computer PCB Pin Badges and PCB Keyrings I make.

Buy individually at www.samcoupe.com/quickshop.htm with UK postage included. For combined shipping for a bundle or international shipping please send a message via the site.

#samcoupe #zxspectrum #commodore #c64 #dragon32 #retrogaming #retrocomputing

I had hoped to pop into the Centre of Computing History this weekend as they've a Dragon 32 event and say 'hello' but despite being up and down to Cambridgeshire every week at the moment I'm not able to make things coincide to be there.

But, I have designed another PCB Badge to add my growing range, this time it is of the Dragon 32!

https://www.samcoupe.com/quickshop.htm

https://www.ebay.co.uk/itm/117105786267

All helps add a few pounds to the development fund for everything #retrocomputing I'm working on!

#dragon32 #retrogaming #gamedev

From the CoCo Nation Show, mentioned some of the Dragon 32 (Welsh CoCo not-quite-clone) games & books. So I go looking… and they have fuck-all on Archive, or on their own site:
https://archive.worldofdragon.org/

Some of these books look good, but only a few are archived:

https://archive.org/details/Inside_the_Dragon_1983_Adn-Wesley_Publishing_Company

https://archive.org/details/creating-adventure-games-on-your-dragon-32
#retrocomputing #dragon32

I received my "Oojamaflip" #Dragon32 adapter kit today.

It allows cartridges (minus the case) to be installed INTERNALLY to the computer. Still allowing cartridges to be plugged in externally.

It came as a kit, so I was surprised that it worked first time after my infrequent soldering skillz were applied!

With this setup I'm now running the SD interface internally so the cartridge is no longer obstructing the TV stand that I made.

Please don't judge my soldering.