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commodore 64
(foldoc) | Commodore 64
C64
(C64) An 8-bit Commodore Business Machines
personal computer released around September 1981.
Prototypes were (apparently) made before Christmas 1980 (and
shown at some computer fair).
The CPU was a 6510 from MOS Technology (who were a
wholly owned subsiduary of Commodore at this time(?)). The
C64 had 64 kilobytes of RAM as standard and a 40-column
text, 320x200 pixel display generating composite video,
usually connected to a television.
DMA-based memory expanders for the C64 (and C128) allowed
128, 256, and 512 kb of RAM. Several third party
manufacturers produce accelerators and RAM expanders for the
C64 and C128. (Some, risking a holy war, compare this to
putting a brick on roller-skates). Such accelerators come in
speeds up to 20MHz (20 times the original) and RAM expanders
to 16MB.
The C64's 1541 5.25 floppy disk drive had a 6502
processor as a disk controller.
See also Commodore 65.
["Assembly language programming with the Commodore 64", Marvin
L. De Jong].
(1996-06-05)
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| | podobné slovo | definícia |
commodore 64
(foldoc) | Commodore 64
C64
(C64) An 8-bit Commodore Business Machines
personal computer released around September 1981.
Prototypes were (apparently) made before Christmas 1980 (and
shown at some computer fair).
The CPU was a 6510 from MOS Technology (who were a
wholly owned subsiduary of Commodore at this time(?)). The
C64 had 64 kilobytes of RAM as standard and a 40-column
text, 320x200 pixel display generating composite video,
usually connected to a television.
DMA-based memory expanders for the C64 (and C128) allowed
128, 256, and 512 kb of RAM. Several third party
manufacturers produce accelerators and RAM expanders for the
C64 and C128. (Some, risking a holy war, compare this to
putting a brick on roller-skates). Such accelerators come in
speeds up to 20MHz (20 times the original) and RAM expanders
to 16MB.
The C64's 1541 5.25 floppy disk drive had a 6502
processor as a disk controller.
See also Commodore 65.
["Assembly language programming with the Commodore 64", Marvin
L. De Jong].
(1996-06-05)
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commodore 64dx
(foldoc) | Commodore 65
Commodore 64DX
(Or Commodore 64DX, C65, C64DX) The last 8-bit
computer designed by Commodore Business Machines, about
1989-1991. The C65 boasts an ugly collection of custom
integrated circuits which makes even the Amiga hardware
look standard.
The core of the C65 chipset is the CSG 4510 and {CSG
4569}. The 4510 is a 65CE02 with two 6526 CIAs. The
4569 is equivalent to a combination of the 6569 VIC-II and
the MMU of the Commodore 64. The C65 also has a {DMA
controller} (Commodore's purpose built DMAgic) which also
functions as a simple blitter, and a floppy controller for
the internal Commodore 1581-like disk drive. The floppy
controller, known as the F011, supports seven drives (though
the DOS only supports 2). The 4510 supports all the C64
video modes, plus an 80 column text mode, and bitplane
modes. The bitplane modes can use up to eight bitplanes, and
resolutions of up to 1280 x 400. The palette is 12-bit
like the Amiga 500. It also has two SID's (MOS 8580/6581)
for stereo audio.
The C65 has two busses, D and E, with 64 kilobytes of RAM
on each. The VIC-III can access the D-bus while the CPU
accesses the E-bus, and then they can swap around. This
effectively makes the whole 8MB address space both {chip
ram} and fast ram. RAM expansion is accomplished through
a trap door slot in the bottom which uses a grock of a
connector. The C65 has a C128-like native mode, where all
of the new features are enabled, and the CPU runs at 3.5
megahertz with its pipeline enabled. It also has a C64
incompatibility mode which offers approx 50-80%
compatibility with C64 software by turning off all its {bells
and whistles}. The bells and whistles can still be accessed
from the C64 mode, which is dissimilar to the C128's
inescapable C64 mode.
Production of the C65 was dropped only a few weeks before it
moved from the Alpha stage, possibly due to Commodore's cash
shortage. Commodore estimate that "between 50 and 10000"
exist. There are at least three in Australia, about 30 in
Germany and "some" in the USA and Canada.
(1996-04-07)
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portable commodore 64
(foldoc) | Portable Commodore 64
A version of the Commodore 64 modelled after the
original Osborne portable PCs, with a flip-down keyboard that
revealed a 5-inch colour monitor, and a built-in 1541 {floppy
disk} drive. It is thought that few were made but that they
did go on sale, at least in Canada.
[Relationship to Commodore 65?]
(1997-09-14)
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