eightbit Posted October 1, 2020 Author Share Posted October 1, 2020 And, if I can ever find a decently priced 32X and Genesis 2 style loopback cable I will attempt the 32X mod. That is going to require a few more wires. 1 Quote Link to comment Share on other sites More sharing options...
BigO Posted October 1, 2020 Share Posted October 1, 2020 (edited) 1 hour ago, eightbit said: And, if I can ever find a decently priced 32X and Genesis 2 style loopback cable I will attempt the 32X mod. That is going to require a few more wires. Sorry, too late. I sold off my 32x a few years ago. I think I may have kept the really odd cable I found that worked with the 32x. It's several feet long, gray, molded 90 degree connectors on each end. Now that I'm thinking of it, I don't recall it being in the box of Genesis stuff. I did find my custom hacked A/V cable. But, now you've got me wondering where I put that goofy cable...maybe I did send it with the 32x... Edited October 1, 2020 by BigO Quote Link to comment Share on other sites More sharing options...
Duttroid Posted Saturday at 04:56 PM Share Posted Saturday at 04:56 PM Regarding the function of each pin, from AmiBay Forums: the genesis 3 va1 model here is the missing asic pins to the cart pins and there ops ___________________________________________________________________ | B1 |Audio circuit | 32X audio left |------|--------------------|---------------|-------------------------------- | B3 | Audio circuit | 32X audio right |------|--------------------|---------------|-------------------------------- | B12 | ASIC pin 24 | YS (32X) |------|--------------------|---------------|-------------------------------- | B13 | ASIC pin 25 | Vertical sync (32X) |------|--------------------|---------------|-------------------------------- | B14 | ASIC pin 26 | Horizontal sync (32X) |------|--------------------|---------------|-------------------------------- | B15 | ASIC pin 152 | EDCLK (32X) |------|--------------------|---------------|-------------------------------- | B19 | ASIC pin 151 | CLK (Game Genie/Virtua Racing/32X) |------|--------------------|---------------|-------------------------------- | B21 | ASIC pin 158 | CAS (32X) |------|--------------------|---------------|-------------------------------- | B26 | Connected | !CE_H (Virtua Racing/32X) |------|--------------------|---------------|-------------------------------- | B30 | ASIC pin 43 | !S_RES (MD/G<->SMS mode) |------|--------------------|---------------|-------------------------------- | B32 | ASIC pin 42 | !CART_IN (Sega CD connector) Quote Link to comment Share on other sites More sharing options...
Duttroid Posted Saturday at 05:05 PM Share Posted Saturday at 05:05 PM I recently did this "function restoration" to a VA1 Genesis 3. I actually did it twice to ensure wires were not too long and to check my work. A noticeable amount of SMS games do not work correctly. For example, I am experiencing the identical issue with Wonder Boy III as shown in the Reddit link below. I wonder if there were known issues with the Genesis-On-A-Chip ASIC and SMS games, and thus compatibility was intentionally omitted from the Genesis 3. Here are the non-working games that I have tried so far. Tried with both cheap EverDrive MD and BackBit with PowerBase FM converter: Alien Syndrome: Scrambled graphics on "Round 1" screen. Stage 1 shows for a moment, game crashes, game resets. After Burner: Crashes at BackBit screen. Master of Darkness: Black screen, does not start Alex Kidd: The Lost Stars: Some Artifacts / garbage around Alex on title screen. Game resets after "Find the miracle ball" voice over. Argos no Ju-Jikken / Rygar: Game works, but all sprites are black on stage 1. After stage 1, sprites take the colors of certain background objects. My Hero: Scambled graphics, game crashes and returns to scrambled title screen when a start is attempted. Dynamite Dux: Scrambled graphics and crash just after passing Colonel Sanders. This ROM is patched for FM support - I will find and try the original soon. Bomber Raid (FM Enabled): Scambled background. No enemies at all. Boss music starts after a few minutes, then game completely crashes to a white screen while boss music loops. Bomber Raid (FM Disabled): Scambled background. Game crashes after a couple of seconds and resets. Teddy Boy: does not start. Black screen. Teddy Boy Blues: does not start. Black screen. Ghost House: Scrambled graphics. A demo appears, but controller is not responsive. Controller is again not responsive with an adapter setting the Select Pin 7 high from Pin 5 using a 100K Ohm resistor (SMS mode). Quote Link to comment Share on other sites More sharing options...
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