DexVM Virtual Machine
Hello everyone, This topic's background has been lost in the Forum catastrophe, however basically I'm trying to develop a virtual machine that will be cross-compatible with multiple platforms. I'm targetting small architecture machines like Microcontrollers and low-end processors, and the original full implementation will be provided for DexOS. I have spent some time on the "hardware" description of the VM, here are some bullet points: The instruction set will be RISC-like, in that all instructions are 1 byte followed by parameters. Hopefully only ~ 80 instructions will be necessary. There will be 4 general purpose registers. Size is TBD. There will be a "software Interrupt" defined, with the subroutine number (0-255) in the first register. The other 3 registers will hold all other data for the routine. This will be the gateway to allow use of system routines almost directly. (They will act like a generic BIOS, allowing access to routines that all OS's should be able to implement simply) 256 ports will be defined, most user space, a few rigid, like Standard IO, PIO, SIO, etc. I'm using a dial-up connection now, so a white sheet will be uploaded some time next week with details. Of course all criticism is welcome.
Hello everyone, This topic's background has been lost in the Forum catastrophe, however basically I'm trying to develop a virtual machine that will be cross-compatible with multiple platforms. I'm targetting small architecture machines like Microcontrollers and low-end processors, and the original full implementation will be provided for DexOS. I have spent some time on the "hardware" description of the VM, here are some bullet points: The instruction set will be RISC-like, in that all instructions are 1 byte followed by parameters. Hopefully only ~ 80 instructions will be necessary. There will be 4 general purpose registers. Size is TBD. There will be a "software Interrupt" defined, with the subroutine number (0-255) in the first register. The other 3 registers will hold all other data for the routine. This will be the gateway to allow use of system routines almost directly. (They will act like a generic BIOS, allowing access to routines that all OS's should be able to implement simply) 256 ports will be defined, most user space, a few rigid, like Standard IO, PIO, SIO, etc. I'm using a dial-up connection now, so a white sheet will be uploaded some time next week with details. Of course all criticism is welcome.