Dragon 32

Dragon 32Dragon Data started the production of the Dragon 32 in Late 1982. The Dragon 32 was the first computer that the company had produced. It was a successful machine, since other rival companies had difficulty in supplying their machines to customers. The CPU worked on a frequency of 0.9Mhz, but when the machine uses a DMA channel with the CPU in Halt Mode it is also possible to double the frequency for faster transfer rates. Some machines were released to use the 1.78MHz frequency, but after a while the CPU crashes because of heating problems. On the first place the machine had to be released with only 16K Ram, but after the announcement that Spectrum were releasing a 48K machine, Dragon Data decided to release the machine with 32K of Ram.

Internal Dragon 32

Dragon 32
UK: £175 later it was sold around £100
Boxed: 209146 DG
1982
Motorola 6809E running at a frequency of 0.9Mhz.
16 Kbytes Rom containing the full version of Microsoft colour BASIC. 32Kbytes Ram not expandable.
Medium Beige plastic case with a very strange case and large Multi-Colour Dragon-32 label. The keyboard is a full size 53 keys, typewriter non standard QWERTY style.
A 6847 chip is used to produce graphic and text displays of:
256×192 with 2 colours, text is displayed at 32×16,
128×192 with 2 or 4 colours, text is displayed at 16×16,
128×96 with 2 or 4 colours, text is displayed at 16×8.
For sound the Dragon 32 uses a 6-bit DAC CPU controlled chip. The Chip is capable of producing 64 different levels of volume with speech and sample recording capabilities, but since the chip is controlled by the CPU sample quality is not very impressive.
1 x Cartridge port,
2 x Analogue joysticks,
1 x Tape recorder running at 1200 bps,
1 x Parallel Centronics printer port,
1 x RF connector (Audio & Video),
1 x RGB monitor.
External power supply with an output voltage of 18 and 12v.
Dimensions 325mm x 375mm x 90mm (W x L x H) Weight Approx 2Kg.
Around 65,000 Units where sold and others did not make it on the market, due to company bankruptcy.

The club currently owns one Dragon 32 with Basic manual, two original Dragon joysticks, Power supply and RF leads. The machine is in very good working condition.


 

Expansion Port

Expansion Connector 40 Pin

Pin Name Dir Desc
1 +12V OUT +12V DC
2 HALT IN Request Port
3 /RESET IN Reset 6809
4 Q OUT 6809 Clock
5 +5V OUT +5V DC
6 D1 OUT Data Bit 1
7 D3 OUT Data Bit 3
8 D5 OUT Data Bit 5
9 D7 OUT Data Bit 7
10 A0 OUT Address 0
11 A2 OUT Address 2
12 A4 OUT Address 4
13 A6 OUT Address 6
14 A8 OUT Address 8
15 A10 OUT Address 10
16 A12 OUT Address 12
17 OV N/A Ground
18 ESND IN Analogue IN
19 A13 OUT Address 13
20 A15 OUT Address 15
A +12V OUT +12V DC
B /NMI IN 6809 Non Maskable Intr
C E OUT 6809 Clock
D CB1 IN Cartridge
E D0 IN/OUT Data Bit 0
F D2 IN/OUT Data Bit 2
H D4 IN/OUT Data Bit 4
J D6 IN/OUT Data Bit 6
K READ /WRITE IN Read Active Low Write
L A1 OUT Address 1
M A3 OUT Address 3
N A5 OUT Address 5
P A7 OUT |Address 7
R A9 OUT Address 9
S A11 OUT Address 11
T /R2 IN C000-FEFF (Chip Select)
U 0V N/A Ground
V /P2 IN FF40-FF5F Select
W A14 OUT Address 14
X /EXMEM IN Turns of Internal ROM

Joystick Left

5 Pin Din 360

Pin Name Dir Desc
1 X VERT POT IN Vertical Pot 100k
2 Y HORZ POT IN Horizontal Pot 100k
3 GND N/A Ground
4 FIRE IN Fire Button
5 Z POT COMMON N/A Pot Common

Joystick Right

5 Pin Din 360

Pin Name Dir Desc
1 X VERT POT IN Vertical Pot 100k
2 Y HORZ POT IN Horizontal Pot 100k
3 GND N/A Ground
4 FIRE IN Fire Button
5 Z POT COMMON N/A Pot Common

Power

9 Pin D-Sub Male

Pin Name Dir Desc
1 8.5V AC IN 8.5V AC 1.5A
2 8.5V AC IN 8.5V AC Return
3 14V AC IN 14V AC 0.25A
4 Common IN 14V AC Common Return
5 14V AC IN 14V AC 0.25A
6 8.5V AC IN 8.5V AC 1.5A
7 8.5V AC IN 8.5V AC Return
8 N/C N/A No Connection
9 N/C N/A No Connection

Tape Port

5 Pin Din 180

Pin Name Dir Desc
1 REM GND N/A Remote Ground
2 GND N/A Ground
3 REMOTE IN Remote
4 EAR OUT Data IN
5 MIC IN Data OUT