PDA on Z80.

Hello doctorgenius The idea is not new [http://zx.pk.ru/showthread.php?t=3115].

Hello doctorgenius A little off topic, but z88 - read about it, it's Sinclair's creation, again 8) http://www.nvg.ntnu.no/sinclair/computers/z88/z88.htm

Hello doctorgenius I would take a picture of the insides of this miracle and throw some here... Interesting to see...

Hello, All The idea came up to develop and assemble Spectrum - a compatible PDA. I got a Z88 Cambridge computer - a laptop with a Z80 from 1987. True LCD is broken. B In principle, it is not a laptop or a laptop, because... nothing opens in it. Description I found this model and photo here http://phantom.sannata.ru/museum/cambridge_z88.shtml As for the performance of the computer, this Spectrum is made with only 4 (!) microcircuits. I found datasheets on them. 1. Zilog Z80 2. NEC D65031GF168 is a programmable logic matrix, in this computer on The chipset is made from it. 3. NEC D42832C-15L - Static RAM 32K 4. NEC D23C1000 - ROM (BIOS). There are additional 3 connectors for connecting cartridges: 1. 128 K static RAM (4 chips of the same type as on the motherboard, but in a different body). 2. 32K EPROM (UV erasable). I don’t have a 3rd cartridge and I don’t know what should be there. Additionally, the computer is equipped with a DB9 female connector. The keyboard on it is truly unique - it is made according to the principle of a keyboard calculator or remote control. The upper elastic band is made of one piece, and the bottom Conductive rubber bands are glued. The computer was powered by 4 AA batteries or from an external source. An ionistor is installed on the board to prevent the RAM from being cleared when replacing batteries. The computer itself does not turn on, and there is little point in repairing it, because... LCD is not for it get it. It is quite possible to draw a circuit from a printed circuit board, because shedouble-sided, not multi-layered. In real life, in addition to the above-mentioned device, there is the Sharp MZ-700 and the Orel BK-08 (by the way, we did the last one in Dnepropetrovsk) (!). I have little documentation for Spectrums: materials from “Radio” for 1995 g. I'm interested in firmware/source codes/schemes for everything related to Spectrums. On "crafts" from the 80s and 90s. like ORION-128, RADIO-86RK, MICRO-80, this is all enough, but on the Z80 I didn’t find anything useful except emulators and application software.

Hello, doctorgenius http://opensourcezx.narod.ru/