Hardware manual

1 Specification EUROCOM-17-5xx
28 Hardware Manual
1.4 Compatibility to the EUROCOM-17
The EUROCOM-17-5xx is built as an adequate substitute for the
EUROCOM-17-1xx or EUROCOM-17-2xx. Nevertheless, some changes
were necessary:
Differences between EUROCOM-17-5xx and EUROCOM-17-1xx/2xx:
• Address map slightly changed (see Chapter3 ‘Programmers Reference’).
• The graphics interface has changed. For detailed information, see
Section3.4 ‘Graphics Interface’.
• 4-bit overlay implemented (see Section1.3.5 ‘Graphics Interface’,
Section3.4.6 ‘Overlay Memory’).
• Revision EEPROM to save board revision information.
• Programmable interrupt level for system CIO, user CIO, CLCD2401.
• VMEbus interrupt for secondary CPU possible, see Section2.3.8
‘VMEbus Interrupts for Secondary CPU (J1703)’ for detailed
information.
• Main memory is placed at changeable memory module.