Search found 270 matches
- Thu Jun 18, 2020 10:47 pm
- Forum: GENERAL FOR SALE & WANTED
- Topic: For Sale: 27C400 EPROM emulators (beta) issue D
- Replies: 96
- Views: 71814
Re: For Sale: 27C400 EPROM emulators (beta) issue D
More coming in a week or so. I'll assemble some this weekend.
- Wed Jun 17, 2020 9:40 am
- Forum: 8 BIT CORNER
- Topic: 27C400/27C800 EPROM emulator
- Replies: 149
- Views: 112546
Re: 27C400/27C800 EPROM emulator
I am so cramped for space on this thing there is no chance to fit on any isolation... I don't think it would entirely mitigate the risk to the PC of hot plugging the 0.1" headers. The solution is to use a connector designed for hot plugging - but I don't see how to physically fit one! I could s...
- Tue Jun 16, 2020 7:35 pm
- Forum: 8 BIT CORNER
- Topic: 27C400/27C800 EPROM emulator
- Replies: 149
- Views: 112546
Re: 27C400/27C800 EPROM emulator
Right so I've hit a brick wall with these things. The problem is that with headers you can't stop a user connecting the USB at the header end (rather than the USB plug) if they are using a non-earth referenced computer and the module is installed in an earth referenced device (e.g. retro computer). ...
- Wed Jun 10, 2020 7:55 pm
- Forum: GENERAL FOR SALE & WANTED
- Topic: For Sale: 27C400 EPROM emulators (beta) issue D
- Replies: 96
- Views: 71814
Re: For Sale: 27C400 EPROM emulators (beta) issue D
Fonzie got the last of this batch. They went quick.
I will order some more parts tomorrow to build up my remaining blank PCBs. They could well be the last ones I make probably until I've got PCB assembly & testing sorted.
I will order some more parts tomorrow to build up my remaining blank PCBs. They could well be the last ones I make probably until I've got PCB assembly & testing sorted.
- Mon Jun 08, 2020 7:43 pm
- Forum: GENERAL FOR SALE & WANTED
- Topic: For Sale: 27C400 EPROM emulators (beta) issue D
- Replies: 96
- Views: 71814
Re: For Sale: 27C400 EPROM emulators (beta) issue D
I made another batch so I have some more stock now.
- Thu Jun 04, 2020 1:30 pm
- Forum: 8 BIT CORNER
- Topic: 27C400/27C800 EPROM emulator
- Replies: 149
- Views: 112546
Re: 27C400/27C800 EPROM emulator
I think my impression was that A17-A19 are "broken" through the cpld when in 27C200 mode. But i guess thats not the case. No I don't have enough pins to do that. The STM 32, pads (A18, A19) and pin 1/A17 pad (A17) are wire ORed on the 5v side of the buffers. I thought about putting solder...
- Wed Jun 03, 2020 10:18 pm
- Forum: 8 BIT CORNER
- Topic: 27C400/27C800 EPROM emulator
- Replies: 149
- Views: 112546
Re: 27C400/27C800 EPROM emulator
The module might be in "no wire rom switch" mode and when the USB powers it and the H4 is off it sees that as a long reset press (>3s) - which always goes to ROM 0. In the options menu check... a) reset wire free ROM switch is N (disabled) b) ROM switch pull up is Y (enabled) Then C to com...
- Tue Jun 02, 2020 7:03 pm
- Forum: MEMBER BLOGS
- Topic: Projects and Stuff
- Replies: 166
- Views: 77905
- Tue Jun 02, 2020 7:01 pm
- Forum: AMIGA MEMBER BLOGS
- Topic: A500 Fast RAM & IDE
- Replies: 17
- Views: 15027
Re: A500 Fast RAM & IDE
The PLCC to DIP adapters arrived today so I can finally try my project with a 68HC000 I have had for months.. Photo0962b.jpg Obligatory sysinfo shot: Photo0964b.jpg This is running at 36MHz. The fast RAM isn't as fast as it could be because I have a noddy refresh in place at the moment - do a refres...
- Tue Jun 02, 2020 4:36 pm
- Forum: MEMBER BLOGS
- Topic: Projects and Stuff
- Replies: 166
- Views: 77905
Re: Projects and Stuff
@cmorley I have to order the program adaptor to upgrade the boards but plan on upgrading. I don't understand this - do you mean update the firmware? If so you don't need any special hardware just the USB connection & a DFU utility for your platform of choice (I use the STM Cube Programmer which...