Marking, Pppp, Mask Option Specifications, Sto

MCS™8308

CUSTOM ROM ROM

ORDER FORM

CUSTOMER				_
P.O. NUMBER	.			_
OATE				_
	For Intel use only
S#	_	PPpp ---------
STO	_	zz,		_
		00		_
APp	_	OATE	.	_

All custom 8308 ROM orders must be submitted on this form. Programming information should be sent in the form of computer punched cards or punched paper tape per the formats designated on this order form. Additional forms are available from Intel.

MARKING

The marking as shown at the right must contain the Intel logo, the product type (P8308), the 4-digit Intel pattern number (PPPP), a date code (XXXX), and the 2-digit chip number (DO). An optional customer identification number may be substituted for the ch ip number (ZZ). Optional Customer Number (maximum 9 characters or spaces).

CUSTOMER NUMBER

INTEL PATTERN NUMBER

• 8308 PPPP

I xxxx zz

CHIP NUMBER OR

DATE CODE

CUSTOMER NUMBER

MASK OPTION SPECIFICATIONS

A. CHIP NUMBER (CHIP SELECT OPTION)

Must be specified 0 or 1.

The chip number will be coded in terms of positive logic where a logic "1" is high level input.

Chip Select Truth Table

Chip

Number CS1 CS2 Selected

00 0 Yes

1 0 1 Yes

01 0 No

1 1 1 No

Chip Number

B. ROM Truth Table Format

Programming information should be sent in the form of computer punched cards or punched paper tape. Ineither case, a printout of the truth table should be accompanied with the order.

The following general format is applic- able to the programming information sent to Intel:

•Data fields should be ordered begin- ning with the least significant address (0000) and ending with the most sig. nificant address (1023).

•A data field should start with the most significant bit and end with the least significant bit.

•The data field should consist of P's and N's.A P is to indicate a high level output (most positive) and an N a low level output (most negative). In terms of positive logic, a P is defined as a logic "1" and an N is defined as a iogic "0". If the programming information is sent on a punched paper tape, then a start character, B, and an end charac- ter, F, must be used in the data field. See paragraph 2.

1.Punched Card Format

An SO-column Hollerith card (prefer- ably interpreted) punched by an IBM 026 or 029 keypunch should be sub- mitted. The first'card will be a title card; the format is as follows:

5-59

8080 specifications

The Intel 8085 and 8080 microprocessors were groundbreaking innovations in the world of computing, paving the way for future microprocessor development and personal computing.

The Intel 8080, introduced in 1974, was an 8-bit microprocessor that played a fundamental role in the early days of personal computing. With a 16-bit address bus, it had the capability to address 64 KB of memory. Running at clock speeds of 2 MHz, the 8080 was notable for its instruction set, which included 78 instructions and 246 opcodes. It supported a range of addressing modes including direct, indirect, and register addressing. The 8080 was compatible with a variety of peripherals and played a crucial role in the development of many early computers.

The microprocessor's architecture was based on a simple and efficient design, making it accessible for hobbyists and engineers alike. It included an 8-bit accumulator, which allowed for data manipulation and storage during processing. Additionally, the 8080 featured registers like the program counter and stack pointer, which facilitated program flow control and data management. Its ability to handle interrupts also made it suitable for multitasking applications.

The Intel 8085, introduced in 1976, was an enhancement of the 8080 microprocessor. It maintained a similar architecture but included several key improvements. Notably, the 8085 had a built-in clock oscillator, simplifying system design by eliminating the need for external clock circuitry. It also featured a 5-bit control signal for status line management, which allowed for more flexible interfacing with peripheral devices. The 8085 was capable of running at speeds of up to 3 MHz and had an extended instruction set with 74 instructions.

One of the standout features of the 8085 was its support for 5 extra instructions for stack manipulation and I/O operations, which optimized the programming process. Additionally, it supported serial communication, making it suitable for interfacing with external devices. Its 16-bit address bus retained the 64 KB memory addressing capability of its predecessor.

Both the 8080 and 8085 microprocessors laid the groundwork for more advanced microprocessors in the years that followed. They demonstrated the potential of integrated circuits in computing and influenced the design and architecture of subsequent Intel microprocessors. Their legacy endures in the way they revolutionized computing, making technology accessible to a broader audience, and their influence is still felt in the design and architecture of modern microprocessors today.

Intel 8080 manual Marking, Pppp, Mask Option Specifications, Customer Number Oate, Sto

Models: 8080