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The ROM firmware and the vCPU interpreter are written in the 8-bit native assembly code. 16-bit vCPU interpreter, that implements a von Neumann architecture and has 34 instructions. It loads and runs programs from RAM. The integrated programs are written for this vCPU. MOS 6502 emulator (experimental), able to run MOS 6502 machine code. [5] [6]
A 16-bit address space for between 1 kibibyte (KB) and 64 KB of either programmable read-only memory (PROM, OTP), read-only memory (ROM), or flash memory, are used to store code and constants, and there is a second 16-bit address space which can be used for large applications.
It was founded in 1984 by Peter Gotcher and Evan Brooks. The company began as a project to raise money for the founders' band, selling EPROM chips for drum machines. It is a subsidiary of Avid Technology, and during 2010 the Digidesign brand was phased out. Avid Audio products will continue to be produced and will now carry the Avid brand name.
Emulator Latest version Released Guest emulation capabilities Host Operating System License 86Box: 4.0.1 October 16, 2023: x86 PC: Cross-platform: GPLv2: DOSBox: 0.74-3 June 26, 2019: 386, 486, Pentium, Tandy 1000, IBM PCjr: Cross-platform: GPL MAME (formerly MESS) 0.273 December 31, 2024: Various computers, consoles, and arcade systems Cross ...
To retrieve data from the EPROM, the address represented by the values at the address pins of the EPROM is decoded and used to connect one word (usually an 8-bit byte) of storage to the output buffer amplifiers. Each bit of the word is a 1 or 0, depending on the storage transistor being switched on or off, conducting or non-conducting.
In-circuit emulation (ICE) is the use of a hardware device or in-circuit emulator used to debug the software of an embedded system. It operates by using a processor with the additional ability to support debugging operations, as well as to carry out the main function of the system.
The 8021 processor scans the key matrix, converts switch closures to an 8-bit code and then transmits that code serially to the keyboard interface on the main system. It will also accept commands to turn indicator LEDs on or off. The 8021 was also used in the keyboards for the TRS-80 Model 12, 12B, 16, 16B and the Tandy 6000/6000HD. [6]
In computer architecture, 16-bit integers, memory addresses, or other data units are those that are 16 bits (2 octets) wide.Also, 16-bit central processing unit (CPU) and arithmetic logic unit (ALU) architectures are those that are based on registers, address buses, or data buses of that size. 16-bit microcomputers are microcomputers that use 16-bit microprocessors.