ABC 800

The

pixels at 2 bpp) using 16 KB RAM as video memory.^[5]

The ABC 800 came in a monochrome version with amber text on a brown background with an 80 character wide screen, and a color version with 40 characters. The main board is integrated with the keyboard, much like the Amiga 500. However, the ABC computer has a very sturdy metal chassis.

Storage is usually two

5.25" floppy disk

units in 160, 320 or 640 KB capacity. External hard disk systems became available later (primarily the ABC 850 with 10 MB). Model numbers 'ABC 800 M' for monochrome and 'ABC 800 C' for color.

Luxor advertising asked, "Who needs

W ABC

'.

The ABC 800 computer was also sold by Facit under the name Facit DTC.^[3]

ABC 802

The ABC 802 is a compact version with 64 KB RAM where 32 KB is used as a RAM disk. The main board is integrated with a 9"

CRT

screen and has improved graphics, though no high-resolution graphics. Luxor ABC 802 was a model with a small monochrome screen in yellow phosphor, intended for offices. Here with two 5.25 inch disk drives along the side of the display. The grey-brown color was common for all ABC 800 (and ABC 1600) products and was different from the beige ABC 80.

ABC 806

The ABC 806 is a version with main board, screen (DA-15) and keyboard (DIN-7) as separate units. It has 164 KB RAM where 128 KB is used as a RAM disk, as well as more advanced 512x240x16 graphics.^[3]

Performance

In order to see how the ABC 800 would compare to other contemporary personal computers, in 1982, the Swedish magazine MikroDatorn used the Rugg/Feldman benchmarks of eight short BASIC programs (BM1 - BM8) defined by the American Kilobaud Magazine and routinely used by the British magazine Personal Computer World for testing new machines.

The result was that ABC 800's semi-compiling BASIC interpreter turned out to be faster than most other BASICs used in popular machines, especially when integer variables are used, the results for some well known computers were as follows (times in seconds):

                           BM1   BM2   BM3   BM4   BM5   BM6   BM7   BM8
ABC 800 (integer)         not measured - see ABC 80 for approximate numbers
ABC 800 (single precision) 0.9   1.8   6.0   5.9   6.3   11.6  19.6  29
ABC 800 (double precision) 1.2   2.2   10.0  10.6  11.0  17.8  26.4  144

IBM PC                     1.5   5.2   12.1  12.6  13.6  23.5  37.4  35
Apple III                  1.7   7.2   13.5  14.5  16.0  27.0  42.5  75
VIC-20                     1.4   8.3   15.5  17.1  18.3  27.2  42.7  99
ZX81 in "fast mode"        4.5   6.9   16.4  15.8  18.6  49.7  68.5  229

As seen from the table, the ABC 800 was approximately twice as fast as the IBM PC on

single precision

results in the table.

ABC 800 character set

ABC 800 character set, as described on the user manual^[7]

ASCII code	Character Mode	ASCII code	Character Mode	Graphic Mode	ASCII code	Character Mode	Graphic Mode	ASCII code	Character Mode
32		56	8		80	P	P	104	h
33	!	57	9		81	Q	Q	105	i
34	"	58	:		82	R	R	106	j
35	#	59	;		83	S	S	107	k
36		60	<		84	T	T	108	l
37	%	61	=		85	U	U	109	m
38	&	62	>		86	V	V	110	n
39	´	63	?		87	W	W	111	o
40	(	64	É	É	88	X	X	112	p
41	)	65	A	A	89	Y	Y	113	q
42	*	66	B	B	90	Z	Z	114	r
43	+	67	C	C	91	Ä	Ä	115	s
44	,	68	D	D	92	Ö	Ö	116	t
45	-	69	E	E	93	Å	Å	117	u
46	.	70	F	F	94	Ü	Ü	118	v
47	/	71	G	G	95	-	-	119	w
48	0	72	H	H	96	é		120	x
49	1	73	I	I	97	a		121	y
50	2	74	J	J	98	b		122	z
51	3	75	L	L	99	c		123	ä
52	4	76	N	N	100	d		124	ö
53	5	77	M	M	101	e		125	å
54	6	78	N	N	102	f		126	ü
55	7	79	O	O	103	g		127