...
 | Z88's operating system OZ is stored in a 128K ROM. It also has 32K |
...
RAM(Slot 0). This is not enough memory for every day use. |
...
 | Motherboard Conversion in Service Manual | ||
 | Increasing the ROM area, OZ has been able to grow, improved and new features added. This may be done in three different ways. |
- Externally - by changing the RAM chip in an external card.
- Internally - by changing the 32K RAM chip
Choosing a memory chip that works with the Z88 is important. Manufactures and the availability of chips change. See Memory Chips for the most 'up-to-date' results.
EPROMs and ROMs store OZ, the Z88's operating system and are used for permanent storage. These can be replaced with Flash
The Flash memory can be increased two different ways.
- Externally - by changing the EPROM chip in an external card.
- Internally - by changing the 32K ROM chip containing the operating system.
512K RAM
In 2010 the 1M Flash card PCB was redesigned allowing three types of cards to be made, each using the 1M maximum size permitted. | |
 | External card slots increase the capability of the Z88 by adding RAM and EPROM cards, to increase the working area and save those important files. The maximum size (RAM or EPROM) that can be in the external card slot is 1M byte. Additional cards were placed in the different slots. Slot 1 for RAM to make the Z88 an expanded machine, additional applications were stored in Slot 2 leaving Slot 3 free for saving files to EPROM cards. |
 | The 512K/512K RAM/Flash card is the easiest way of expanding the Z88 with just one card.
Alternatively two cards may be used, 1M Flash and 1M Low Power RAM giving
|
| Note: Expanding the Motherboard, RAM, FLASH, EPROM and PROM may be found in the Projects Section. |