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| Chip Position & Chip-Type |
| D2 | Floppy Disk Controller WD2791 |
| D54 | CPU 80186 |
| D55 | Dual-Port DRAM Controller 8207 |
| D12 - D20 | Speicherbank 0 Lo |
| D30 - D38 | Speicherbank 0 Hi |
| D39 - D47 | Speicherbank 1 Lo |
| D56 - D64 | Speicherbank 1 Hi |
| D93 | Urlader Lo |
| D94 | Urlader Hi |
| D141, D142 | Interrupt-Controller I8259A |
| D143 | NV-RAM MK48Z02 (Optional) |
| D144 | Enhanced programmable communicationsinterface SCN2661B Tastatur unter MS-DOS |
| D145 | Enhanced programmable communicationsinterface SCN2661B (Reserve) |
| D146 | Enhanced programmable communicationsinterface SCN2661B (Drucker) |
| D148 | RTC MC146818 |
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