terriblefire wrote: ↑Fri Sep 04, 2020 12:59 pm
Trying to decide if its worth removing the 68000 and putting the logic analyser on it
Could it be that we have just witnessed the first step towards a Terriblefire Megadrive Accelerator?
Well i wanted to plug it in for the lolz .
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
Somebody needs to try strapping one of the exxos 16Mhz accellerators on....
More seriously, what are /Halt and /Reset doing? And the address/data lines?
Also, you mentioned it was on RF, have you considered trying another video connection, or retuning the TV?
I suppose you aren't getting sound though, also suggesting it is dead.
How about the wandering gangs of dodgy looking electrolytics? Any fishy residue noticeable?
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
rubber_jonnie wrote: ↑Fri Sep 04, 2020 3:38 pm
Somebody needs to try strapping one of the exxos 16Mhz accellerators on....
More seriously, what are /Halt and /Reset doing? And the address/data lines?
Also, you mentioned it was on RF, have you considered trying another video connection, or retuning the TV?
I suppose you aren't getting sound though, also suggesting it is dead.
How about the wandering gangs of dodgy looking electrolytics? Any fishy residue noticeable?
Nothing nasty looking on the caps. Will check HALT.
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
Tomswork wrote: ↑Fri Sep 04, 2020 10:05 pm
Have you checked the electrolytic capacitors around the sound chip and motherboard they leak and cause shorts or act kike resistors
Tom
All the caps were fine. The machine is now in landfill. It looked like someone had struggled with this before.
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
I'm not seeing these cheap ones ebay that people speak of.
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
