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The card slots at the front of the machine are the route by which memory can be added and external software can be provided. File Eprom or File Flash cards, used for archiving, are not part of the card manager scheme, since they do not effect any part of the system outside of the Filer. RAM and ROM EPROM/FLASH cards have effects throughout the system and so the card manager exists to keep track of their movements. The most basic rule of the card manager is the machine must be on (ie. the display lit up) and the computer in the Index popdown. At this stage RAM and ROM and EPROM/FLASH cards may be freely added. It is the removal of cards, however, which is problematical.
Removing a RAM card is a dangerous business. If a card is removed, a flashing FAIL message will appear at the top of the OZ window and the Z88 will not respond to the keyboard. The machine should now be soft reset (replacing the RAM card will not un-fail the machine because the data on the card will have been lost), and with luck files in other RAM devices will be intact. This cannot be guaranteed and it is recommended that files are backed up on EPROM on EPROM/FLASH or on another computer. Fortunately removing a RAM card need only be done in exceptional circumstances, such as upgrading to a larger RAM. If a FAIL message occurs without removing a RAM card, then some of the RAM memory in the machine may be faulty, however a software crash can also cause a FAIL state to occur.
ROM cards EPROM/FLASH cards should only be removed from the Index, with the machine on. Attempts to remove a card when not in the Index will result in a continuous high pitched tone and a flashing INDEX symbol. The system will be locked until the card is replaced in its original slot. After replacement go to the Index before attempting to remove the card. If an application on the ROM the EPROM/FLASH card is being used, indicated by the slot number next to the application name in the suspended activities list, and the card is removed, the system, once the flap is reclosed, will bleep and flash CARD in the OZ window. The card must be replaced before anything else can be done. Removing cards is very straightforward providing you make sure the machine is switched on and close the flap after each removal and insertion, to check that no rules have been disobeyed.
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