27C400 EPROM emulators (beta) issue D technical discussion
Re: 27C400 EPROM emulators (beta) issue D technical discussion
Please update the thread if you hear further news. I'd be interested to find out why it doesn't work in your setup.
Re: 27C400 EPROM emulators (beta) issue D technical discussion
lukzer has started looking at the issue now.
He asks, what are the latest firmware versions for the emulator?
He asks, what are the latest firmware versions for the emulator?
Re: 27C400 EPROM emulators (beta) issue D technical discussion
All issue D modules shipped with the same final firmware. There are no updates.
Re: 27C400 EPROM emulators (beta) issue D technical discussion
Update, for the record, here because the thread was split. Looks like the 5719 GARY chip in this A500 was faulty. A replacement GARY got the accelerator and emulator working together.
Re: 27C400 EPROM emulators (beta) issue D technical discussion
Apols for the thread resurrection!
There's been mention of using these in 8bit machines, I'm quite interested in trying to get one of mine working in a c64, I have a desire to be able to easily switch between ~ 16 kernels, and rather than come up with some hackery using a 27c020 & an Arduino/stm32, this seemed like a possibility.
Would I need to have some switching in the interface layer because there's no 64kbit rom size option (32kbit 16 bit?), I guess there would need to be some firmware changes to get to that level of granularity within the emulator, and from what I had seen there wasn't much flash space left on the atmel.
Just curious as I really like how simply the switching works, and it would be simply to hook the restore key up to the rom switch line in a 64 (since there's no reset switch on a standard machine).
There's been mention of using these in 8bit machines, I'm quite interested in trying to get one of mine working in a c64, I have a desire to be able to easily switch between ~ 16 kernels, and rather than come up with some hackery using a 27c020 & an Arduino/stm32, this seemed like a possibility.
Would I need to have some switching in the interface layer because there's no 64kbit rom size option (32kbit 16 bit?), I guess there would need to be some firmware changes to get to that level of granularity within the emulator, and from what I had seen there wasn't much flash space left on the atmel.
Just curious as I really like how simply the switching works, and it would be simply to hook the restore key up to the rom switch line in a 64 (since there's no reset switch on a standard machine).
Re: 27C400 EPROM emulators (beta) issue D technical discussion
The STM32 ran out of pins so 27C200 is the smallest. You could put a switch on A16 and get 2x banks per ROM switcher bank if you must have more than 8x images... you can put it in 8-bit more with the /byte pin (just the same as a 27c400).
Re: 27C400 EPROM emulators (beta) issue D technical discussion
OK, thought as much (not sure why I wrote atmel above though, age!), thanks for taking the time to respond.