Search found 9 matches

by bestmmk
Tue Mar 07, 2017 11:04 pm
Forum: NES Hardware and Flash Equipment
Topic: [SOLVED]help , About UM6558 / UM6559 Pinouts
Replies: 28
Views: 13886

Re: help , About UM6558 / UM6559 Pinouts

Maybe you can put some CPLD logic between UM6558/UM6559 on CD0-7 lines, which changes problematic dot colours in the fly to the correct ones, that don't cause troubles? Haha, I think so too. In fact, it's too hard for me, I need more help, but now the situation has surprised me . Only a few people ...
by bestmmk
Tue Mar 07, 2017 11:01 pm
Forum: NES Hardware and Flash Equipment
Topic: [SOLVED]help , About UM6558 / UM6559 Pinouts
Replies: 28
Views: 13886

Re: help , About UM6558 / UM6559 Pinouts

lidnariq wrote:I have to admit I'm really curious what the contents of the ColorData bus are, for no good reason.
CD0-CD7 should be color data of graphics. This requires a logical analysis. If the palette problem is corrected, it will be of great value
by bestmmk
Tue Mar 07, 2017 4:31 am
Forum: NES Hardware and Flash Equipment
Topic: [SOLVED]help , About UM6558 / UM6559 Pinouts
Replies: 28
Views: 13886

Re: help , About UM6558 / UM6559 Pinouts

in a russian forum but I forgot where it was _(:з)∠)_
um6558.PNG
hereis pinout! finally i finished!

it tested by 孙大师(a.k.a master) and confirmed it works with paltte problem。
by bestmmk
Tue Feb 28, 2017 7:47 pm
Forum: NES Hardware and Flash Equipment
Topic: [SOLVED]help , About UM6558 / UM6559 Pinouts
Replies: 28
Views: 13886

Re: help , About UM6558 / UM6559 Pinouts

In the image with nominal pinout of the 6558, those are the instructions to replace a 6558 with a 6538. So, undoing it ... the lines about 10, 11, 12, and 13 say that, unlike the 2C02 or UA6538, the pin order is not CPUA2, CPUA1, CPUA0, /PPUCE, but instead /PPUCE, CPUA2, CPUA1, CPUA0. The little re...
by bestmmk
Tue Feb 28, 2017 6:25 pm
Forum: NES Hardware and Flash Equipment
Topic: [SOLVED]help , About UM6558 / UM6559 Pinouts
Replies: 28
Views: 13886

Re: help , About UM6558 / UM6559 Pinouts

I have already used the resistance value to analyze its pinout, Combined with the real PCB picture found it really and 2c02 or 6528/6538 differents. I'm not clear: have you figured this out? or do you still need help? NO _(:з)∠)_ i just already found VCC and GND , and some pin linked with cpu, but ...
by bestmmk
Mon Feb 27, 2017 10:35 pm
Forum: NES Hardware and Flash Equipment
Topic: [SOLVED]help , About UM6558 / UM6559 Pinouts
Replies: 28
Views: 13886

Re: help , About UM6558 / UM6559 Pinouts

HardWareMan might be able/willing to help you, whenever he stops by again. Maybe. Otherwise, all I can do is suggest how you would reverse-engineer the pinout using a multimeter. I wouldn't be surprised if the pinout is almost the same as the 2C02 's, just with the extra eight pins at the bottom fo...
by bestmmk
Sun Feb 26, 2017 7:55 pm
Forum: NES Hardware and Flash Equipment
Topic: [SOLVED]help , About UM6558 / UM6559 Pinouts
Replies: 28
Views: 13886

Re: help , About UM6558 / UM6559 Pinouts

Are you in SECAM land? https://forums.nesdev.com/viewtopic.php?p=100870#p100870 implies that the UM6559 part won't be useful otherwise ... nope. im chinese , recnetly , i found these chipset in other topics, and mentioned this can be modifyed to rgbs singal output. but I can't find the UM6558 data ...
by bestmmk
Sat Feb 25, 2017 8:02 pm
Forum: NES Hardware and Flash Equipment
Topic: [SOLVED]help , About UM6558 / UM6559 Pinouts
Replies: 28
Views: 13886

[SOLVED]help , About UM6558 / UM6559 Pinouts

As topic said, now I have three UM6558 and UM6559 (russia dendy clone )

But there is no any datasheet or pinout data on UM6558
QQ图片20170226105916.jpg
I found some pinout data on the Russian BBS, but there was not much help. Their data are in conflict......
by bestmmk
Sat Feb 25, 2017 7:28 pm
Forum: Reproduction
Topic: FDS RAM Adapter - NES Version
Replies: 31
Views: 38335

Re: FDS RAM Adapter - NES Version

The best solution is to re-create a PCB on NES cartridges, integrate FDS Stick or similar