Intel system development kit: Difference between revisions

Revision as of 06:13, 19 October 2020

Revision as of 04:23, 21 March 2021

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[[Image:MYSSTE 80.jpg|thumb|Intel SDK-80, assembled]]

[[Image:MYSYST 80.jpg|thumb|Intel SDK-80, unassembled]]

The 8080 System Design Kit (SDK-80) of 1975 provided a training and prototype vehicle for evaluation of the [[Intel 8080]] microcomputer system (MCS-80), clocked at 2.048 MHz. (The basic 8080 instruction cycle time was 1.95 μsμs, which was four clock cycles.) The SDK-80 allowed interface to an existing application or custom interface development. A monitor ROM was provided.

**RAM 256 bytes expandable to 1 KB

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[[Image:MYSYST 85.jpg|thumb|Intel SDK-85 Kit]]

[[Image:MYSSTEM 85.jpg|thumb|Assembled Intel SDK-85]]

The SDK-85 MCS-85 System Design Kit was a single board microcomputer system kit using the [[Intel 8085]] processor, clocked at 3 MHz with a 1.3 μsμs instruction cycle time. It contained all components required to complete construction of the kit, including LED display, keyboard, resistors, caps, crystal, and miscellaneous hardware. A preprogrammed ROM was supplied with a system monitor. The kit included a 6-digit LED display and a 24-key keyboard for direct insertion, examination, and execution of a user's program. It also had a serial transistor interface for a 20 mA current loop Teletype using the bit-serial SID and SOD pins on the CPU. The maximum user RAM for programs and data, on the factory standard kit, was limited to 0xC2 or 194 decimal bytes. The full 256 bytes was available on the expansion RAM. User programs could call subroutines in the monitor ROM for functions such as: Serial In/Out, CRLF, Read Keyboard, Write Display, time delay, convert binary to two character hexadecimal etc.

**RAM 256 bytes expandable to 512 bytes with another 8155 RAM / 22 programmable IO lines. The 14-bit programmable Timer/Counter was used for system single-step control. The expansion Timer/Counter was available.