exxos wrote: ↑Sat Sep 11, 2021 11:27 pm
Where are you testing the address zero at , on the booster board ? I'd assume you have a bad connection and combel is seeking some other ( wrong ) address and does not issue dtack, I'd assume one of the higher address lines is broken between the booster and motherboard.
I tested A1-A15 on the cartridge port, but, yeah, I could only probe A16-23 on the pin on my board.
You're probably right, though. Must be one of those top lines. My mobo has had connection problems on the expansion port before & have had to reseat cards a few times often. No joy with reseating this one, though, so I might get some fine sandpaper on the terminals.
I should probably invest in some deoxit as my WD40 contact cleaner doesn't do much, it seems.
BW
DFB1 Open source 50MHz 030 and TT-RAM accelerator for the Falcon
DSTB1 Open source 16Mhz 68k and AltRAM accelerator for the ST
Smalliermouse ST-optimised USB mouse adapter based on SmallyMouse2
FrontBench The Frontier: Elite 2 intro as a benchmark