MEM11 Status Update

I'm making good progress on the MEM11 firmware. I spent the last few days re-doing the firmware build environment. Previously, it would build all the files each time. Now there is a proper Makefile (even though it takes about a minute to build everything). I realized that I needed something better than what I had because there are multiple targets (emulator, FPGA eval board and the MEM11 board itself). Right now I'm focused on getting as much debugged on the emulator since it has a reasonable debuging environment. I've also integrated various test programs into the build environment and use various low level code as part of the main firmware for hardware access. This "kills two birds with one stone" since it tests not only the various hardware functions it also allows me to debug some of the firmware separately from the full code base. At this point, the emulator fully supports all of the J1 instructions (and they all work too!). In terms of I/O (that will be part of the MEM11 board) it supports LEDs and various configuration inputs, FRAM, UART and timers. The biggest risk that I'm taking is that the UART is emulated as being directly exposed. On the MEM11 hardware, the UART will be connected through a SPI interface which requires that all accesses to the UART are asynchronous transactions. The biggest piece of work remaining on the emulator will be emulating the Unibus interface. The work here will mainly to create a means to script various Unibus transactions. However, before doing that, I'll be testing out the boot loader code and the configuration firmware since none of that is dependent upon the existence of functional Unibus hardware. TTFN - Guy