🇬🇧 BBC Master Compact: Part 1 (Dusting it off) [ скачать в хорошем качестве

🇬🇧 BBC Master Compact: Part 1 (Dusting it off) [

The BBC Model B was the first vintage computer system that I was really interested in (apart from the Amstrad CPC series), but they are yet to feature on the channel! I have a bunch of Model Bs and just one Master system ... a Master Compact. 00:00 ... Intro 02:33 ... Checking the ports 04:30 ... Checking the motherboard 07:10 ... Initial power on check - NOK 10:00 ... Closer look at the motherboard 12:58 ... Checking the Service Manual 15:15 ... Yeah, you can skip this 17:00 ... Checking the 16MHz oscillator 20:32 ... Crystal replaced, dodgy RCA connector 21:02 ... Power on test again 22:40 ... Channel outro & thanks The Master Compact is a cutdown version of the Master 128 that had the computer contained within the keyboard and a separate unit containing the 3½" drive and power supply. The keyboard was connected to the unit by a 5V power cable and a DB25 cable for the disk drive. Some further info here: https://chrisacorns.computinghistory.... You can run the machine with just a +5VDC power supply with 2.1mm plug (centre positive) - probably a modern USB charger is enough. The major chips on the board: 6522: Versatile Interface Adaptor (VIA) VC2069: Video ULA (or VIDPROC) HD6845: CRT controller (CRTC) SAA5050: Teletext character generator CF30048: CRTC Multiplexer CF30049: Peripheral Bus Controller CF30050: I/O Controller CF30058: Memory Controller (socketed) WD1772: Floppy Drive Controller (FDC) 65C12: CPU PCD8572: 1Kbit (128x8bit) EEPROM (socketed) There are some empty sockets for the RS232 serial support. ECONET support comes via a daughterboard that plugs into the motherboard. -------------------------------- Check out my Patreon for regular blog-type updates between videos - there is a free membership tier and two paid tiers (US$2 and US$5). There is also a one-week trial for the paid tiers so if you don't think it's worth it, then cancel ... no hard feelings ... I appreciate any support, even if it's just subscribing to my YouTube channel!   / thecluelessengineer   -------------------------------- Music by Karl Casey @ White Bat Audio https://karlcasey.bandcamp.com    / @whitebataudio