It's been a while. I proceed now with manufacturing of the prototype multi-board plane. Currently I am in the process of soldering connections between 3 expansion card slots that go on the main board. One of the cards will be a CPU+Clock+EPROM+Base RAM+I/O decoder. The other one will be RAM expansion card. The 3rd one will be a Graphics/TV card. Other sections that will go to the plane in the future are: I/O bus buffer, I/O expansion slots, Prioritized Interrupt Controller, Power Supply Circuit, Reset and NMI Interrupt switches. Once I do the CPU card, I/O buffer circuit and I/O expansion bus, I will manufacture the RS-232/UART card and LCD and Real Time Calendar cards which will go to I/O expansion slots. The fun will start after that - I have Commodore SID sound card on mind, TV card, I/O card with SPI and/or I2C interfaces implemented in software and some clever mass storage device (SD/CF). I also wanted to build IDE HDD interface and perhaps floppy controller. I will see how long I will be able to keep this project going. However, until then, the boring process of point-to-point soldering. Some pictures of today's work are provided below:
Till next time...
