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Wednesday, July 1, 2009
General registers:
8-bit B and 8-bit C registers can be used as one 16-bit BC register pair. When used as a pair the C register contains low-order byte. Some instructions may use BC register as a data pointer.
8-bit D and 8-bit E registers can be used as one 16-bit DE register pair. When used as a pair the E register contains low-order byte. Some instructions may use DE register as a data pointer.
8-bit H and 8-bit L registers can be used as one 16-bit HL register pair. When used as a pair the L register contains low-order byte. HL register usually contains a data pointer used to reference memory addresses.
Stack pointer is a 16 bit register. This register is always incremented/decremented by 2.
Program counter is a 16-bit register.
8-bit D and 8-bit E registers can be used as one 16-bit DE register pair. When used as a pair the E register contains low-order byte. Some instructions may use DE register as a data pointer.
8-bit H and 8-bit L registers can be used as one 16-bit HL register pair. When used as a pair the L register contains low-order byte. HL register usually contains a data pointer used to reference memory addresses.
Stack pointer is a 16 bit register. This register is always incremented/decremented by 2.
Program counter is a 16-bit register.
General registers:
8-bit B and 8-bit C registers can be used as one 16-bit BC register pair. When used as a pair the C register contains low-order byte. Some instructions may use BC register as a data pointer.
8-bit D and 8-bit E registers can be used as one 16-bit DE register pair. When used as a pair the E register contains low-order byte. Some instructions may use DE register as a data pointer.
8-bit H and 8-bit L registers can be used as one 16-bit HL register pair. When used as a pair the L register contains low-order byte. HL register usually contains a data pointer used to reference memory addresses.
Stack pointer is a 16 bit register. This register is always incremented/decremented by 2.
Program counter is a 16-bit register.
8-bit D and 8-bit E registers can be used as one 16-bit DE register pair. When used as a pair the E register contains low-order byte. Some instructions may use DE register as a data pointer.
8-bit H and 8-bit L registers can be used as one 16-bit HL register pair. When used as a pair the L register contains low-order byte. HL register usually contains a data pointer used to reference memory addresses.
Stack pointer is a 16 bit register. This register is always incremented/decremented by 2.
Program counter is a 16-bit register.
History of the Microprocessor
1994-95 - Fifty-two of the companies actually produce their RISC processors, and they all compete with one another for the 2.5% of the market not owned by Intel. Most die within weeks. DEC’s RISC processor, the Alpha, actually manages a slow, lingering death that takes about three years. The last RISC survivor, the PowerPC chip, is chosen for the next generation of Macintosh computers, since Apple’s executives would rather chew broken glass than use an Intel chip.
Do you offer products or services?
The Intel Museum has given us permission to offer our exhibit technology to other museums and institutions, including fully functional 130x scale replicas of the 4004 built using discrete transistors, museum-durable keyboards and slide switches, and video display electronics.
Within the next few months we plan to offer limited edition, "glass printer" Busicom 141-PF replicas suitable for displaying in your home or office, and built using vintage 4004-family chips. These Intel chips are expensive and in short supply, but if there is sufficient interest in more affordable replicas built using modern chips yet still running the original Busicom software, we would be happy to oblige.
Within the next few months we plan to offer limited edition, "glass printer" Busicom 141-PF replicas suitable for displaying in your home or office, and built using vintage 4004-family chips. These Intel chips are expensive and in short supply, but if there is sufficient interest in more affordable replicas built using modern chips yet still running the original Busicom software, we would be happy to oblige.
Microprocessors and Mounting
The mounting method refers to the type of connection the microprocessor makes with the motherboard. The following table lists the various mounting packages and some of the well known microprocessors that are mounted for that package.
Socket 7 - AMD K5, K6, Intel Pentium 75-200Mhz, IBM
Socket 370 - Some Intel Celerons
Slot 1 - Intel Pentium II, Pentium III, Some Celeron 266-533
Slot II - Intel Xeon
Slot A - AMD Athlon
The Socket 7 processors are becoming less popular. We recommend socket 370, through slot A microprocessors at the current time. The prices on Socket 370 microprocessors are currently very low considering the performance of the systems. I recently bought a Celeron 500Mhz microprocessor with 66Mhz sidebus for under $120 with a motherboard for $84. When buying a microprocessor, make sure you get the type of socket you think since some processors are made for different sockets such as the Celeron. Be sure of one of the following.
The socket type is stated at the vendors website.
There is a microprocessor part number stated at the vendors website that can be traced to the manufacturers website which specifies the mounting package you want.
Socket 7 - AMD K5, K6, Intel Pentium 75-200Mhz, IBM
Socket 370 - Some Intel Celerons
Slot 1 - Intel Pentium II, Pentium III, Some Celeron 266-533
Slot II - Intel Xeon
Slot A - AMD Athlon
The Socket 7 processors are becoming less popular. We recommend socket 370, through slot A microprocessors at the current time. The prices on Socket 370 microprocessors are currently very low considering the performance of the systems. I recently bought a Celeron 500Mhz microprocessor with 66Mhz sidebus for under $120 with a motherboard for $84. When buying a microprocessor, make sure you get the type of socket you think since some processors are made for different sockets such as the Celeron. Be sure of one of the following.
The socket type is stated at the vendors website.
There is a microprocessor part number stated at the vendors website that can be traced to the manufacturers website which specifies the mounting package you want.
Tuesday, June 30, 2009
Crash Courses & Regular Courses in Dancing
Salsa, Freestyle, Hip-Hop and bollywood Dances. Special batches for kids. Fresh Batches starting soon. Enroll now for free demo. Studio 9, Road No: 10, Banjarahills.
Ph: 9000764546, 66752220, 64587220
Ph: 9000764546, 66752220, 64587220
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