On Fri, Jan 14, 2022 at 2:06 AM Joseph Giliberti via vcf-midatlantic < vcf-midatlantic@lists.vcfed.org> wrote:
Greetings!
First off, I apologize if I'm flooding the list with my project so say the word and I'll try and condense things.
Joe, No need to apologize. You are not "flooding the list". You are asking good questions that are appropriate and on topic for this list. Part of the reason that we have this discussion list is to discuss topics like these and to get help, ideas and comments on what we are working on, looking for, etc. I only ask that you keep the subject line to something that is clear as to what you are discussing. "my current inventory" is too broad. It makes it easier for other to find a topic as well as know what the topic is about before they read it.
Based on feedback from many of you, I've decided to start off in the form factor of a single board computer. Once the basic machine is running, I can start thinking about expansion. Here are my basic plans for the system:
- The computer will be constructed on the prototype board offered to me by Bill Dudley - Basic I/O will be via hexadecimal keypad and numeric display. This will likely mount as a daughter board on top of the prototype board, leaving clearance for components underneath and connected via a ribbon cable - Contained in ROM will be a machine language monitor and some version of TinyBASIC - The machine will have either four or eight kB of SRAM - The machine will have an audio cassette interface utilizing the Kansas City standard for program storage - The machine will have either a serial or current loop interface for communication with a video terminal or teletype
Once the machine is established and I am comfortable with it, I can move on to things like more RAM and a floppy disk controller.
My current component inventory, not including TTL and passive components, includes:
- (1)C8080A - (1)C8212 - (1)C8214 - (2)C8216 - (1)C8228 - (2)C8238 - (1)C8255 - (3)C2112A - (4)2716DC 2kx8 EPROM - (39)P2114 1kx4 SRAM
At this point, I'll stay quiet for a bit and let other projects occupy my time, whilst continuing to study and gain knowledge.
Ask away. As long as you are on topic and have a good subject line you are encouraged to ask and discuss. Jeff Brace
TIA Joe Giliberti