Joust running :D

[grobda]

Finally got round to hooking up the Joust PCB i bought about 10 years ago. Just power and Video for starters - so cross fingers and flick switch... rug pattern appears, resets.

I've mounted the PCBs on a sheet of wood (ex shelf) and hte romboard is on the back so at first i didnt notice the LED blinking 1-1-7,1-1-7 at me repeatedly. Quick google... Well god bless williams for awesome diagnostics. Swap ram at 1-7 with one at 3-8. Now boots to a diagostic screen telling me 'ram error 38' I wish all PCBs were this specific.

So I'm scratching my head wondering if any of the junk in the house has a 4116 RAM and for some reason the 48k spectrum thats been stuck in a box under the stairs for the last 5 years comes to mind. Open the case and there they are, a bank of 4116's, and two are even socketed.

Swapped one out and Joust happily cycles through attract mode. Now for the sound and inputs

 

[trm]

Nice one dude Will bear in mind that I can rob the Spectrums in the loft for 4116s!

 

[grobda]

bought a few 4116s offof ebay so the speccy lives again.

hooked up the inputs fine on joust, but the sound board is on the fritz. no sounds from the diagnostic switch, then a pulsing beep. then nowt again. suspect the ram so ive ordered a 6802 to replace the 6808 and 6810.

lost the video sync after that and it turned out to be a 7486 at 4A. replaced it and lost all video. turns out id knocked a transistor at A2 and snapped a leg. soldered this back and the game booted again. bit sparkly with random pixels - turned the 5v down a bit and they cleared up - seems this pcb prefers about 4.8v.

I sometimes wonder why i dont just play joust on the xbox ;D

 

[grobda]

fully working 6802 fitted, sound is fine, no idea if it was the 6808 or the 6810, they've both gone in the 'probably f**ked' box.