Yeah you can still get that and still get to a promptIf i work backwards and say the the last block is the last block I get 00120402 which makes no sense as i get supervisor and * but its telling me Ram control failure and MemC cam mapping which all sound like address decoding fails.
Are you sure the scope's not AC coupled?This is my 0v rail trace so i have something going on with decoupling. I tried every tantalum and electrolytic against my peak LCR and they all look right apart from the tantalums which are all silly
700mA is a bit tight. Go for more like an amp - there's quite a high inrush AND you have the floppy connected.I am using a seperate bench power supply with current limit at 700ma. it says it uses abot 540ma.
That's pretty strange! Never seen that happen. Could be borked palette writes to VIDC but I doubt it - extra weird is how you have white boxes around the text which is then on a light grey - something very very odd going on!lastly my video out put is faint and reversed i get black characters on a white background. I looked the R G B out put on the scope and its all 1v as i expected, i messed around with Hsynch Vsynch etc and it made no difference starts bright then fades to barley visible.
Statistics: Posted by IanJeffray — Fri Oct 10, 2025 8:29 pm