CUBE Coprocessor Software & Resources

CUBE 6502 Software and Resources

MDFS::Software.Tube.6502.CUBE

Control Universal Systems: CUBIT, EuroCUBE-65, EuroCUBE-09, EuroBEEB.

Control Universal of Cambridge took over Acorn's rackmount/Euroboard systems in about 1982.

The CUBIT microcomputer was purchased board by board from Control Universal to produce a 6502 or 6809-based computer using the standard Acorn bus in a Eurorack. The CUBIT was a developed from the Rockwell AIM 65 to produce a system that could function as an Single Board Computer or be linked to Acorn Eurocards.
EuroCUBE-09 is a 6809-based version allowing FLEX to run on the CUBE Eurocard systems. With BeebFlex the EuroCUBE-09 can be used as a BBC 6809 second processor.
EuroCUBE-65 is a 6502-based Eurocard Single Board Computer compatible with the languages available for the BBC Micro, notably BBC BASIC. The CPU board has a 6522 VIA, a 6522 ACIA and an M3002 RTC.
EuroBEEB is an enhanced version of EuroCUBE-65 designed as a stripped-down, industrially presented version of the BBC Micro, lacking sound generation and speech synthesis, essentially an extendable Eurocard rackmounted Beeb.
With the EuroBEEB Terminal the EuroCUBE-65 and EuroBEEB can be used as a BBC 6502 second processor.
BEEBEX is an extension card permitting BBC Micros to interface to CUBE Eurocards.

Lee Davison has amassed a large amount of CUBE and EuroBEEB parts and documentation, but his website is no longer available. Jules Richardson also has an amount of CUBE parts, but has not documented any of them yet.

Program Environment

To programs running on the EuroCUBE-65 or EuroBEEB the environment and MOS API looks just like the BBC MOS with entry points at &FFxx to the usual BBC routines, program memory at &400-&7FF and program workspace at PAGE to HIMEM.

In addition to the normal support for sideways ROMs at &8000, the CUBE MOS supports a standard sideways ROM program at &C000 and at &E000, as well as a sideways ROM program stored at an arbitary page-aligned address in RAM. The MOS ROM takes advantage of this to include Peripheral Drivers at &C000 (usually VDU and keyboard) and other code at &E000 (usually Control BASIC extensions to BBC BASIC).

Peripheral Drivers

Control Universal produced some standard peripherals which would normally be accessed through a Peripheral Driver at &C000.

VDU Output	Keyboard Input
CU-Graph	CU-Key 99 99-key keyboard connected via Jobber interface.
Teletext 40x25 teletext character display.	CU-Key 53 53-key keyboard connected via on-board VIA.
Monitor Machine code monitor, no display output.	CU-Key 99 99-key keyboard connected via on-board VIA.
Serial output via on-board ACIA.	Serial input via on-board ACIA.

Heading

cube65.png	34K	6502 CPU card circuit diagram, redrawn by Lee Davison.
MemMap	4K	Memory map of the EuroCUBE-65 and EuroBEEB.
ic09v5.bin DecodeIC09 ic09v5.txt	1K 2K 26K	PAL IC 9 provides the memory map decoding and defines what appears in memory where.
ic10v2.bin DecodeIC10 ic10v2.txt	1K 2K 24K	PAL IC 10 provides the I/O map decoding for I/O devices on the CPU board and defines what devices appears where.
AutoMOS36.zip	63K	Configuration programs to create the 6502 CPU card MOS ROM. The program 'B.ROM' allows you to combine the required components to build the CUBE MOS ROM version 3.6. These programs were recovered by BeebMaster.
MOS419.rom MOS419.zip	16K 61K	Pre-built 6502 CPU card MOS ROM. v4.19 MOS, 1MHz clock, CU-Graph display, K99 keyboard, SRAM Control Basic.
MOS300.rom MOS300.zip	16K 15K	Pre-built 6502 CPU card MOS ROM. v3.0 MOS with Teletext peripheral driver. Has a VIA keyboard driver, but not sure which one.
EURO414.rom EURO414.src EURO100.rom	16K 42K 16K 1K	The EuroCUBE-65 and EuroBEEB can be plugged into a BBC or Master computer and used as a 6502 second processor with this ROM plugged into the BBC/Master. They do not connect to the Tube port, but to the serial port. The EURO-Beeb Terminal ROM provides the equivalent functionality of the standard Tube code for the BBC or Master.
		Other bits: OSWORDs. The CUBE uses the 6551 ACIA and the M3002 RTC.
BeebEx.gif	151K	BeebEx circuit diagram.
Control023 Control030	8K 8K	IO Control ROM. Allows access to I/O ports through filing system interface.
EuroBeeb More cards		Lee Davison has amassed a large amount of CUBE and EuroBEEB parts and documentation. Unfortunately, his website is no longer accessible.
-		Jules Richardson also has an amount of CUBE parts, but has not documented any of them yet.

Authored by J.G.Harston
Last update: 28-Jul-2014