Author: Craig Andrews
Memory Expansion Board In the Works
Additional memory is always useful, so one of the next projects is a memory expansion board. It…
Bubble 7110A Ready For The PCB Fab House
The first “real” version of the SBC-85 1 Mbit bubble board is about ready to go to…
The 1MBit Magnetic Bubble Memory Board Fired Up (without catching on fire)
Populating the SBC-85 1 megabit bubble memory board was straightforward, firing it up only slightly more complicated….
Magnetic Bubble Memory Makes a Comeback (for me anyway)
As an undergraduate I was in a very small department where the students were very closely knit…
Bus Monitor Supreme v1.1b is Getting Really, Really Close
I have been having a great deal of fun building and now testing version 1.1b of the…
Cassette Tape Interface Build Files Posted
I just realized that I have not given an update on the Cassette Tape Interface board. The…
Bus Protoboard v1.0b Build Files Released
The SBC-85 100mm x 100mm pad-per-hole Protoboard v1.0b has been received, inspected, and its files are being…
What Do YOU Like in a PROTOBOARD?
One tool for a healthy hardware user group is the ability for the users to create,…
SBC-85 Confidence Test and Utility Set – Not quite ready for prime time, but here ‘ya go.
I have a standard set of confidence tests in assembly that I port over to different systems…
Bus Monitor Board – Data Match Doesn’t Match My Bit Pattern. Note that PENDING is the operative word.
There is a key point regarding the data breakpoint that I have glossed over but it will…