Ads
related to: z80 clear carry case
Search results
Results From The WOW.Com Content Network
The Auxiliary Carry flag is set (to 1) if during an "add" operation there is a carry from the low nibble (lowest four bits) to the high nibble (upper four bits), or a borrow from the high nibble to the low nibble, in the low-order 8-bit portion, during a subtraction. Otherwise, if no such carry or borrow occurs, the flag is cleared or "reset ...
The carry flag is set according to this addition, and subtract with carry computes a+not(b)+C, while subtract without carry acts as if the carry bit were set. The result is that the carry bit is set if a≥b, and clear if a<b. The System/360, [3] ARM, POWER/PowerPC, 6502, MSP430, COP8, Am29000, i960, and 88000 processors use this convention.
The Zilog Z80 is an 8-bit microprocessor designed by Zilog that played an important role in the evolution of early computing. Launched in 1976, it was designed to be software-compatible with the Intel 8080, offering a compelling alternative due to its better integration and increased performance.
Timex Sinclair T/S 1500 (a ZX81 in a ZX Spectrum like case) Lambda Electronics Lambda 8300 [ 8 ] (a 1983 clone, also branded as PC 8300 , DEF 3000 , [ 9 ] Basic 2000 , Marathon 32K , Tonel PC , Unisonic Futura 8300 , PC-81 Personal Computer , CAC-3 , Polybrain P118 , Creon Electronics Power 3000 [ 10 ] or NF300 jiaoXueDianNao [ 11 ] )
Contended memory is Sinclair's name for a portion of the ZX Spectrum's 64 KB addressable memory space. With the full 64 KB, the Z80 microprocessor is the exclusive bus master, so it reads and writes operate at its full bus speed, but contended memory space is shared between the ULA and the Z80, with the ULA having higher priority.
The Z-1 came with 8K of static RAM and used the same chassis as the IMSAI 8080 but featured the Z80 microprocessor rather than the IMSAI computer's Intel 8080 chip. [18] The Z-1 was succeeded by the Z-2 in June 1977, which featured 64K of RAM [19] and the ability to run Cromemco DOS (CDOS), a CP/M-like operating system. [20]
As Florida's Broward County school district announces a new policy to require students carry only clear backpacks, safety experts explain why the measure amounts to "security theater ...
Pages in category "Z80-based home computers" The following 92 pages are in this category, out of 92 total. This list may not reflect recent changes. A. ABC 80;