10-05-2022, 11:34 PM
Someone's connection to the site is a bit wobbly and has been losing posts.
Your video and photos show that your machine is booting up from ROM from Power up by the presence of a video image with a valid string message.
Only a power up event should negate /RESET, there should be nothing to assert it.
/NMI is generated as a very short pulse from a keyboard reset/release event.
These are done as not to corrupt the current DRAM contents by missing any refresh cycles.
The Memory Test ROM relies upon a fully working CHAR RAM. If it is not fully working it may screw up!
Your video and photos show that your machine is booting up from ROM from Power up by the presence of a video image with a valid string message.
Only a power up event should negate /RESET, there should be nothing to assert it.
/NMI is generated as a very short pulse from a keyboard reset/release event.
These are done as not to corrupt the current DRAM contents by missing any refresh cycles.
The Memory Test ROM relies upon a fully working CHAR RAM. If it is not fully working it may screw up!