Introduction

Is this possible? Is this worth it? What's the point?

Is it possible?

What are the requirements for this project?

Z80 Emulator

There are a number of articles on the net. Two of them are pointing to using the PIC32.

http://www.exploringpic32.com/ZX.html

This describes the spectrum and also points to a development board that uses the PIC32MX460F512L microcontroller which is now obsolete, however there is a new board available.

http://www.mikroe.com/downloads/get/1221/pic32mx7_mmb_manual_v101.pdf

This board has the following that can be used for the Z88

power supply source voltage can vary from 9 to 32V DC and from 7 to 23V AC.
Reset button
External power supply source connected to an AC/DC connector provided on the board; or +5V PC power supply over the USB cable - to connect the battery.
PIC32MX795F512L microcontroller consisting of:-
- 1.56 DMIPS/MHz, 32-bit MIPS M4K Core
- 512K Flash (plus 12K boot Flash);
- 128K RAM (can execute from RAM);
- 85 I/O pins;
- SPI, I2C, A/D;
- 16-bit Digital Timers;
- Internal Oscillator 8MHz, 32.768kHz Crystal oscillator;
- RTCC; etc.

TFT 320X240 display with a palette of 262.000 colours. It is used to display graphic content. - the display
8 Mbit Flash Memory
1K Serial EEPROM Module
microSD card slot (2GB for files)
USB Connector (Printer)
micro USB Connectors (Keyboard)
Audio Output - Speaker
RS-232 module - Serial Port
LAN network via a standard RJ45 ethernet connector - Additional computer connection

Not needed additional functions