Search found 13 matches

by Kayumba
Thu May 28, 2020 2:48 pm
Forum: Reproduction
Topic: SNES M27C801 2in1 HiRom games - Diagram for Flip-flop 74HC74
Replies: 18
Views: 512

Re: SNES M27C801 2in1 HiRom games - Diagram for Flip-flop 74HC74

lidnariq wrote:
Thu May 28, 2020 2:44 pm
The pin that is functionally used as A19, to distinguish between the first half and the second half of the data you programmed.


(that is, pin 30)
If so, you talking about pin30 of 27C801 (originally A17 => became A19 after swap method).
I will try to do some test this week-end.
by Kayumba
Thu May 28, 2020 2:39 pm
Forum: Reproduction
Topic: SNES M27C801 2in1 HiRom games - Diagram for Flip-flop 74HC74
Replies: 18
Views: 512

Re: SNES M27C801 2in1 HiRom games - Diagram for Flip-flop 74HC74

Have you already made a reproduction without using the 74'74? yes If so, what did you do there? For Hirom My pin30 of 27C801 (originally A17) connected to pad 44 of PCB (which is A19) For LoROM My pin30 of 27C801 (originally A17) connected to pad 45 of PCB (which is A19) After SWAP BIN method, pin3...
by Kayumba
Thu May 28, 2020 2:19 pm
Forum: Reproduction
Topic: SNES M27C801 2in1 HiRom games - Diagram for Flip-flop 74HC74
Replies: 18
Views: 512

Re: SNES M27C801 2in1 HiRom games - Diagram for Flip-flop 74HC74

That doesn't explain anything... I dont understand your question also... I think you know better than me for what for we nee to do SWAP BIN method. Explanation of SwapBin : pin 1 on the 27C801 is A19, but on the SNES PCB, this pin is A17. So, instead of having to rewire A17 and A19 to different pla...
by Kayumba
Thu May 28, 2020 2:12 pm
Forum: Reproduction
Topic: SNES M27C801 2in1 HiRom games - Diagram for Flip-flop 74HC74
Replies: 18
Views: 512

Re: SNES M27C801 2in1 HiRom games - Diagram for Flip-flop 74HC74

lidnariq wrote:
Thu May 28, 2020 2:08 pm
Why are you swapping the pins around?
Why?
Thats why :
Image
by Kayumba
Tue May 26, 2020 2:19 pm
Forum: Reproduction
Topic: SNES M27C801 2in1 HiRom games - Diagram for Flip-flop 74HC74
Replies: 18
Views: 512

Re: SNES M27C801 2in1 HiRom games - Diagram for Flip-flop 74HC74

paste the second game at the end of first, then save it. Or I use second method with command line, like : copy /B "game1.sfc" + "game2.sfc" two-hirom-games.sfc In this case, where you are combining two 512KiB files to make one 1 MiB file, and placing the result in a 1MB UVEPROM that's 1048576 x 8 b...
by Kayumba
Mon May 25, 2020 3:54 pm
Forum: Reproduction
Topic: SNES M27C801 2in1 HiRom games - Diagram for Flip-flop 74HC74
Replies: 18
Views: 512

Re: SNES M27C801 2in1 HiRom games - Diagram for Flip-flop 74HC74

Great! Thank you for help. Look the final diagram with your corrections: https://i4.imageban.ru/out/2020/05/26/8c13dd58cc4e97c3073abf7d5bffddea.jpg I will try to test it this week-end. I have some questions... And where is ROM adress line for 4Mbit game in M27C801? Depends on how you put the data in...
by Kayumba
Sun May 24, 2020 3:25 pm
Forum: Reproduction
Topic: SNES M27C801 2in1 HiRom games - Diagram for Flip-flop 74HC74
Replies: 18
Views: 512

Re: SNES M27C801 2in1 HiRom games - Diagram for Flip-flop 74HC74

Why this diagram works only with LoRom?

Image
by Kayumba
Fri May 22, 2020 10:50 am
Forum: Reproduction
Topic: SNES M27C801 2in1 HiRom games - Diagram for Flip-flop 74HC74
Replies: 18
Views: 512

Re: SNES M27C801 2in1 HiRom games - Diagram for Flip-flop 74HC74

OK,
Thats mean +Q is it "Data Out 1" ?

And where is ROM adress line for 4Mbit game in M27C801?

Can you tell me, please if on my draw its all right ?
Image
by Kayumba
Thu May 21, 2020 11:17 am
Forum: Reproduction
Topic: SNES M27C801 2in1 HiRom games - Diagram for Flip-flop 74HC74
Replies: 18
Views: 512

Re: SNES M27C801 2in1 HiRom games - Diagram for Flip-flop 74HC74

OMG! :shock: Thank you for help and sorry but i'am lost... I see nothing like /Q or D and +Q ... https://i2.imageban.ru/out/2020/05/21/b5858dc1c4dc5abbc461cfb5cb97c8c2.jpg Where is /CLEAR low or just /CLEAR /PRESET high or +PRESET I tried to understand with my drawing schema, but I think i'am lost.....
by Kayumba
Tue May 19, 2020 1:09 pm
Forum: Reproduction
Topic: SNES M27C801 2in1 HiRom games - Diagram for Flip-flop 74HC74
Replies: 18
Views: 512

SNES M27C801 2in1 HiRom games - Diagram for Flip-flop 74HC74

Hi everyone, I have .BIN file with 2 games of 4Mbit size (total 8Mbit). I programmed M27C801 EPROM and would like to use 74HC74 Flip-flop on my PCB to switch between games with reset button. Can somebody help me to find diagram for Flip-flop 74HC74 and M27C801 EPROM 2in1 HiRom games ? How I have to ...
by Kayumba
Sun Mar 01, 2020 2:08 pm
Forum: Reproduction
Topic: snes circuit diagram lorom hirom with battery
Replies: 4
Views: 2164

Re: snes circuit diagram lorom hirom with battery

Ice Man wrote:
Sun Mar 01, 2020 2:55 am
Search function.
:roll: ?
Dont understand what is mean?
by Kayumba
Sun Mar 01, 2020 2:38 am
Forum: Reproduction
Topic: snes circuit diagram lorom hirom with battery
Replies: 4
Views: 2164

snes circuit diagram lorom hirom with battery

Hi everyone,

Can somebody help me to find snes circuit diagram lorom hirom with battery ?
Where can I find it?

Thanks