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frequency seems to be fine... waveforms are wrong try the PROM at pos 1M

nice to hear that it is working :) i will change it the next days ;)

check the section shown in the attached pic (on the upper soundpcb) because it is only 1 sound (one channel?) affected, it could be there... there are 2 software-controlled switches for each output channel of the soundchip that switches the output through a capacitor to ground (filter ?)...

512 ;-)

the 6502 has: Pin 7 -> Sync http://www.mdawson.net/vic20chrome/cpu/mos_6500_mpu_preliminary_may_1976.pdf (see page 7) SYNC is high while the op code/s is/are being fetched, and goes low again when the 6502 has finished fetching the op code/s. so back to the original topic: if the...

Hi, i just attached some pix of my living room (taken this morning before going to work) in my basement there are 2x gorf upright,centipede upright, defender upright, and a taito upright cab (former stratovox cab), that will be "converted" to a "dedicated" bubble bobble. at my friends place...

i will attach some pics later when i am at home (at work right now) ;-)

Hello to all here, i just saw that i registered to this forum already a long time ago. but i did not introduce myself. sorry for that. I am Jochen Hippel - another arcade-infected enthusiast living in the south-west part of germany. A little bit about myself: Born in 1971 ~1982 Saw my...

the hardware works with all card rack games. the software has been written (until now) only for gorf, wizard of wor and space-zap. .ajh.