Started by Chinnery, 12:02, 27 May 19
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Quote from: schombi on 07:53, 09 January 22My skills in soldering a fairly poor and I have no background in electronics, but I successfully managed to build me a working Batman the Movie cartridge. Thanks for sharing this project!What I´m still struggling with: I was always under the impression that the ACID chip was always required to use a cartridge on the GX4000 and those chips are hard to get these days. How come this project lets you decide whether to run with or without the ACID chip?
Quote from: Shining on 10:55, 05 January 22Quote from: TotO on 17:58, 03 December 21I have tested this schematic by curiosity, and it looks to not work at all. May be I have done something wrong... I don't understand what does special your RC combination compared to the original schematic.Perhaps my schematic was not clear, cause I missed to describe the signal on the RC-combination:On the original oscillogram for acid reset (https://www.cpcwiki.eu/index.php/File:ACID_Init_by_Grim.png) you will notice that after startup the sin signal has to be high. Using the original schematic from nilquader, the sin signal after reset is 50% low or high cause it does not follow the reset at all. Now instead of pulling the RC to VCC, I used the CCLR signal not only for CLK+ but also for PRE at the flip flop to force the flipflop to "1" after reset. Also I lowered the time constant for the RC-combination.I know quite some plusses where this always works and noone reported a single problem until now.
Quote from: TotO on 17:58, 03 December 21I have tested this schematic by curiosity, and it looks to not work at all. May be I have done something wrong... I don't understand what does special your RC combination compared to the original schematic.
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