🇬🇧 BBC Master Compact: Part 2 (Using a Gotek) [TCE #0552]
31Thanks to #PCBWAY for sponsoring this video!
Let's hook the Master Compact up to a Gotek. It's really quite simple using either the cable that is connected to the base unit or by creating one. The machine should come with a 3½" floppy drive but I have no disks with software for it.
My Github page:
https://github.com/0ddjob/BBC_Micros
By default the Master Compact comes with only ADFS support, which isn't widely supported (AFAIK) ... the DFS format has a lot more support (i.e. disk images) so I'll look at installing some ROMs (including DFS) next.
00:00 ... Intro
02:45 ... Floppy interface pinout
04:24 ... Wired then wireless then wired doorbells
05:45 ... Unexpected visitor 🦘
06:40 ... Floppy interface pinout ... again
09:19 ... PCBWAY sponsor spot
10:32 ... Saving on shipping ... only $US5!
12:10 ... Earning commission on designs with PCBWAY
12:50 ... Earning BEANS to exchange for gadgets
13:45 ... Testing the original floppy cable with the Gotek
15:00 ... Ramble about my machine not working in the case
18:00 ... Master Welcome Disk
23:45 ... Testing my interface board with the Gotek (Zork 1)
27:32 ... Channel outro & thanks
My Master Compact has these ROMs installed:
MOS 5.10
UTILS 1.10
ADFS 2.10
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:
hhttps://chrisacorns.computinghistory.org.uk/Computers/MasterCompact.html
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.
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hhttps://karlcasey.bandcamp.com/ / @whitebataudio