(1) simulation development system
This technology is mainly used in the initial stage of the simulator. Because there was no good simulation technology and chip at that time, the simulator was designed as a dual-platform system, which switched between the monitoring system and the user system according to the user's requirements. The performance of this simulation system depends entirely on the level of the designer. The actual final performance varies greatly among manufacturers. But in general, it needs to occupy a certain amount of user resources, and the design is complicated. Now it has been basically eliminated and only used in some development and learning systems.
(2) Bonding technology
Generally speaking, the special simulation chip that people often say is actually Bondout. This kind of analog chip is also a kind of single chip microcomputer. However, it has a special timing to match the simulation. After entering the simulation state, you can freeze the internal time sequence operation, and you can view/modify the internal resources of the single chip microcomputer in a static state. Emulators made by Bondout generally have accurate time sequence operation (there are exceptions). Advantages of low design and production cost: Bondout chips are generally provided by single chip microcomputer manufacturers. Therefore, it can only simulate the single chip microcomputer designated by the manufacturer, and there are few varieties of simulation.
(3) Hook technology
HOOKS is a simulation technology owned by Philips. Mainly solve the simulation problem of different kinds of single chip microcomputer. Using this patented technology, all single-chip computers with HOOKS characteristics can be simulated. Even if it is a single-chip microcomputer from different manufacturers, the simulator made by HOOKS technology can be compatible to simulate a variety of single-chip microcomputers from different manufacturers, and the simulated electrical performance is very close to the real single-chip microcomputer. However, the HOOKS technology has a particularly high technical requirement for simulator manufacturers. Different simulator manufacturers have obtained HOOKS technical authorization at the same time. However, the performance of the designed simulator is very different. Even today, not every simulator manufacturer can produce hook simulators. Even if it is produced, the performance is quite different, so users should carefully distinguish it.
(4) Chip with embedded simulation function
With the development of chip technology, many single-chip microcomputer manufacturers have added simulation function inside the chip, which is generally controlled by JTAG interface. In order to reduce the cost and increase the reliability, the general function of the embedded simulation part is relatively simple. According to the current development trend, if we only simulate the standard MCS-5 1 series single chip microcomputer, we can choose the emulator of Bondout technology. If users want the simulator to be more flexible, such as the enhanced 80C5 1 series single chip microcomputer, they must choose the HOOKS technology simulator. Comparatively speaking, the simulator using HOOKS technology is more cost-effective than Bondout technology.