#bbcmicro

What's that, little buddy? You would like some CYBER. Sure, no probs... (SOUND: ON) #BBCMicro #Cyber #RetroComputing #WHY2025 #39C3

IFEL BeebMMC V5 am BBC Micro Model B Mein BBC Micro Model B hat inzwischen neben dem echten Diskettenlaufwerk auch ein IFEL BeebMMC V5. Im neuen Beitrag geht es um mein aktuelles Setup mit DFS 2.26, SPI 0.91 und BASIC, die wichtigsten Befehle wie *CARD, *DCAT und *DIN, Sideways-ROMs, RLOAD sowie die Möglichkeiten zum Übertragen und Archivieren von Disketten. https://www.jungsi.de/ifel-beebmmc-v5/#BBCMicro #Acorn #BeebMMC #IFEL #RetroComputing #VintageComputing #DFS #8Bit

Did you know there was a system called Red Box for the BBC Micro that enabled you to turn home appliances off and on using your computer? So, basically, an early version of HomeKit, etc. In 1986. https://www.computinghistory.org.uk/det/36892/BBC-Micro-Red-Box/ #BBCMicro #RedBox #homeAutomation

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)

Wish me the luck, the little guy’s going under the knife… the video signal cuts out intermittently so I’m going to try changing the 16MHz oscillating crystal. 🤞 #BBCMicro

So mine’s apparently an Issue 4 from 1982. Although there’s a sticker in it that reads 1 Nov 83 (maybe when it was sold/serviced?) The board’s out and yes, I was a bit of a barbarian and, since I’m not going to be using the composite out, cut the wires to it instead of desoldering them. If I ever need it, I can just connect the wires again. Now the bit that scares me… #BBCMicro #repair

Note, if you will, the beauty of this design: There are seven places where the power supply attaches to the main board but there’s no way you can get it wrong as the lengths of the wire won’t let you. (You still have to know black is 0v.) #BBCMicro #repair

Yep, it’s been half an hour and no dropouts… I’m calling it, my lovely new BBC Micro B is fixed :) Yay! Soooo excited to play with it tomorrow 🥳 Here’s a before video: https://vimeo.com/1181523949#t=26 And an after: https://vimeo.com/1182284426 And the issue, for anyone else who stumbles on this thread, was the 16MHz oscillator circuit (marked X1 on the main board). Also, I could only find a lot of 50 of them, so if anyone needs one, just hit me up and I’ll send it to you :) Huge thanks to the folks on the stardot.org.uk for sharing the fix: https://stardot.org.uk/forums/viewtopic.php?p=246304#p246304 #BBCMicro #BBCMicroModelB #video #dropout #issue #fix #x1 #oscillator