Ok, we now finally have the finished schematic and board layout for the Eprom Emul v0.31. The MKII was redesigned again and an extra control line for /WR was added to make the write cycle more reliable.
The Eagle CAD .brd files will be sent of for checking and processing shortly.

The new battery backup feature of the Eprom Emul MKII has been fully tested and is working very well. It runs using a small control chip and a CR2032 battery.

The Eprom Emul MKII has had another upgrade thanks to an idea from Phoenix. The board shall now have a battery backup feature, so the 32k SRAM chip can be stored while powered down.
Testing shall commence shortly on this.

The Eprom Emul schematic has been redesigned with the addition of two jumpers. The control the two MSB of the address lines so you can lock the eprom to set size. The options are 8k, 16k or 32k. Which makes the Eprom Emul more flexible for future use on other circuits.

Today I tested the Eprom Emul with the DivIDE. And… IT WORKS! The little pascal downloader I wrote many moons ago is a bit hit and miss with the laptop I’m using as the laptop is faster than the eprom emul can cope with. So some changes will have to be made to the download […]

Well, to aid the development of the backbone project we, here at the labz, decided to give life to an old project better known as Eprom Emul. It’s basically a 32k eprom emulator. But in true papaya labz style, I’m sure it’ll be updated and features added.

Today saw the grand birth of the first DivIDE professionally constructed in ‘the labz’.