Temperature Sensor Code

ASI!88 :F1: TEST. SRC IlOO85

ISIS-II 8888/8885 IR:RO RSSEI'IBlER, V2. {I

LOC	(EJ	SEQ			~ STATEJ£NT
		1 ;
826C		2 ;
826C		3 HXDSP			Eoo	Il26CH	; EXPfN) lEX TO DISPl.AY,		SI)I( ~IT~ ROOTIt£
8287		4 OOTPUT			Eoo	8287H	;OOTPUT TO DISPI.AY,	SI)I(	~IT~ ROOTII£
85F1		5 DElAY			Eoo	1l5F1H	;DElAY DISPI.AY, SI)I(	~n~ ROOTII£
		6 ;
		7~
		8 ;
		9 ;
		18 ;
		11;
		12			LXI		; INITIfl.IZE STOCKPOINTER
		13			DI		; DiSABlE INTERRI1'TS
		14 ;
		15;		INITIfl.IZE CWflER IN 8155 F~ CIJMT~ 10)£. L(WI) COlMER
		16; WITH HIGI£ST YIIJ£ (lFFF>
		17	;
2894 JEBF		18			IIYI	A,8BFH
28116 D325		19			OOT	25H	;fl>DRESS F~ T~ Hfl.F OF cru.TER
2898 JEFF		28			IIYI	A. IIFFH
289A [1324		21			OUT	24H	LIllER Hfl.F		OF CWflER
28IlC	JEC{I	22			IIYI	A.8C8H
29IIE	D329	23			OOT	29H	; CIJMT ~ 10)£ START
		24	;
		25;		PI.l.SE TIE		M 5I(IT WITH A POSITIVE GOII«i PLlSE ON 11£ SOD
		26;		OOTPUT PIN OF 11£ 8885.
2818 JEca		27	.;
2818 JEca		28				ft,8C8H
2812	39	29				A,48H	; OOTPUT A HIGH ON SOD LII£
2813	JE48	39				A,48H
2815 39		31					; OOTPUT A LOW ON SOD LII£
2816 FB		32					; EIRILE INTERRlf'TS(AFTER PLlSE)
		33	;

iIIII

1~'

I,'

2817 88

2818 01729

2918 JE48

281D D329

281F DB24

2821 4F

2822 0825

2924 47

2825 263F

2827 2EFF

34; IDlE oolL (HSHOT INTERR\J'TS TIE RST 6. 5 PIN ON 11£ 8885.

35 .'
36tf'O	I«JP
37	JI1P	; IDlE ~TIL INTERRt...,T
38,

~.If'TER INTERR\J'T, STOP COlMER AND REf{) IN FItfll CWlT FRIJI 48; 8155, STORE IN REGISTER PAIR Be.

41;

42 CNTIJ IIYI

43	OOT	28H	;ST~ COooER
44	IN	24H
45	let'	C,A	; STORE LOWER ORDER BYTE IN C
46	IN	25H
47	PKlY	B,ft	; STORE HIIHR ORDER BYTE IN B
48	IWI	H, lFH	; L(WI) Hl WITH FLU START CWlT
49	",,'I	LIIFFH

59.

51; f{)JUST TIE COUNT Yfl.L( IN REGISTER Be TO REPRESENT ACTlA 52. .CWlT (SEE TEXT F~ EXPLANATION)

A1-44

MCS-80/85 specifications

The Intel MCS-80/85 family, introduced in the late 1970s, is a seminal collection of microprocessors that played a pivotal role in the early days of computing. The MCS-80 series, initially targeting embedded systems and control applications, gained remarkable attention due to its innovative architecture and flexible programming capabilities.

The MCS-80 family is anchored by the 8080 microprocessor, which was one of the first fully integrated 8-bit microprocessors. Released in 1974, the 8080 operated at clock speeds ranging from 2 MHz to 3 MHz and featured a 16-bit address bus capable of addressing up to 64KB of memory. The processor’s instruction set included around 78 instructions, providing extensive capabilities for data manipulation, logic operations, and branching.

Complementing the 8080 was a suite of support chips, forming the MCS-80 platform. The most notable among them was the 8155, which integrated a static RAM, I/O ports, and a timer, tailored for ease of designing systems around the 8080. Other support chips included the 8085, which provided improvements with an integrated clock generator, making it compatible with more modern designs and applications.

The MCS-85 series, on the other hand, revolves around the 8085 microprocessor, which provided a more advanced architecture. The 8085 operated at clock speeds of up to 6 MHz and came with a 16-bit address bus, similar to its predecessor. However, it introduced more sophisticated features, including an enhanced instruction set and support for interrupt-driven programming. These enhancements made the 8085 especially appealing to developers working in real-time processing environments.

The MCS-80/85 family utilized NMOS technology, known for its lower power consumption and higher performance compared to previous technologies like TTL. The family’s architecture allowed for easy interfacing with a variety of peripherals, making it a favorite for educational institutions and hobbyists embarking on computer engineering projects.

With its robustness, versatility, and affordability, the Intel MCS-80/85 microprocessors laid the groundwork for many subsequent microcomputer systems and applications. The legacy of this powerful family continues to influence modern microprocessor design, emphasizing the importance of reliable architecture in a rapidly evolving technology landscape.

Intel MCS-80/85 manual Temperature Sensor Code

Models: MCS-80/85