Intel 210200-002 manual Memory Utilization Bytes iAPX 88 vs Z80 Bytes of Code

APPENDIX

Table 7 gives the bytes of object code used to encode the benchmark programs. The Average Relative Code Size number of 1.97 says that the ZSO used nearly twice as much memory to store its programs as the iAPX SS.

Even though the majority of the ZSO opcodes are shorter than iAPX S8 opcodes, the ZSO requires more memory mostly because the iAPX 88 used fewer lines of code as shown in Table 6.

Table 7. Memory Utilization (Bytes) (iAPX 88 vs Z80)

	Bytes of Code		Relative Code Size
Benchmark Programs	iAPX88/10	Z80	zaO/iAPX 88
Computer Graphics	40	151	3.78
16-Bit Multiply	14	41	2.93
Vector Add	18	30	1.67
Block Move	15	11	0.73
Block Translate	24	26	1.08
Character Search	18	15	0.83
Word Shift	6	21	3.50
Bubble Sort	38	62	1.63
Reentrant Call	48	83	1.73
Interrupt Response	15	28	1.87
Average Relative Code Size·			1.97
Adjusted Average Relative Code Size·			1.91

NOTE:

*See Table 3, notes 3 and 4 for description of average calculations.

1.0
.9
.8
.7
.8
.5
	0.40
.4	r--
.3	-0.26
.2
.1
	PROCESSOR

3.0

2.5~

	1.97
2.0	r--

1.0	,..!:!.		.-!!...
	0		0
	i		i
	>C..	~	1.::	~
	:!!		:!!
	PROGRAM LENGTH		CODE SIZE

Graph I. Normalized Average Throughput	Graph II. Normalized Average: Program Length and
	Code Size

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