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To permit the use of this feature, some 8051-compatible microcontrollers with internal RAM larger than 256 bytes, or an inability to access external RAM, [20] access internal RAM as if it were external and have a special function register (e.g. PDATA) that permits them to set the upper address of the 256-byte page. This emulates the MCS8051 ...
NetLib Encryptionizer supports AES 128/256 in CBC, ECB and CTR modes for file and folder encryption on the Windows platform. Pidgin (software) , has a plugin that allows for AES Encryption Javascrypt [ 8 ] Free open-source text encryption tool runs entirely in web browser, send encrypted text over insecure e-mail or fax machine.
An AT89c2051 microcontroller in circuit. The Atmel AT89 series is an Intel 8051-compatible family of 8 bit microcontrollers (μCs) manufactured by the Atmel Corporation.. Based on the Intel 8051 core, the AT89 series remains very popular as general purpose microcontrollers, due to their industry standard instruction set, their low unit cost, and the availability of these chips in DIL (DIP ...
The Z80 uses 252 out of the available 256 codes as single byte opcodes ("root instruction" most of which are inherited from the 8080); the four remaining codes are used extensively as opcode prefixes: [46] CB and ED enable extra instructions, and DD or FD select IX+d or IY+d respectively (in some cases without displacement d) in place of HL.
The round constant rcon i for round i of the key expansion is the 32-bit word: [note 2] = [] where rc i is an eight-bit value defined as : = {= > < > where is the bitwise XOR operator and constants such as 00 16 and 11B 16 are given in hexadecimal.
In 1996, the Scorpion ZS-256 Turbo+ version was introduced, featuring a "turbo" mode (7 MHz instead of the original's 3.50 MHz), IDE Controller, CMOS, interrupt controller, ISA8 slot, as part of the SMUC expansion card., expansion board 101-key PC type keyboard, 3.5" floppy disk drive and a XTR modem (allowing access to ZX Net and FidoNet).
256–16384 bytes 256–4096 bytes The ATmega series features microcontrollers that provide an extended instruction set (multiply instructions and instructions for handling larger program memories), an extensive peripheral set, a solid amount of program memory, as well as a wide range of pins available.
One of the major improvements the PCI Local Bus had over other I/O architectures was its configuration mechanism. In addition to the normal memory-mapped and I/O port spaces, each device function on the bus has a configuration space, which is 256 bytes long, addressable by knowing the eight-bit PCI bus, five-bit device, and three-bit function numbers for the device (commonly referred to as the ...