| Atom |
|---|
 |
|
| Manufacturer | Acorn |
| Processor | 6502 | 1MHz |
| Text display | 32x16 | monochrome |
| Graphics display | 256x192 | monochrome |
| Interfaces | | Cassette interface | | RF interface |
|
| Memory | 2k expandable to 12k | unknown |
| Sound | 1 channel |
| Keyboard | Typewriter-style | unknown |
| Size | unknown |
| Weight | unknown |
| Announced | unknown |
| Released | unknown |
| Production stopped | unknown |
| Price | unknown |
The Acorn Atom had a very simple design, which makes emulation simple.
The most complicated part is the CPU emulation, which was already
available. The Acorn Atom only has three memory mapped I/O-ports
for the communication with the hardware.
The Acorn Atom has a simple one-to-one memory mapped video interface
(using the MC6847 video chip), which means that a fixed part of the
memory is displayed on the screen line by line. There are only a
limited number of video modes, one text mode (with no blinking cursor),
and a number of graphical modes. The basic ROM's provide black and
white graphics. An extension ROM allows graphic modes with two additional
colours.
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