sd:appendix_3_memory_map
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| sd:appendix_3_memory_map [2026/02/25 02:50] – appledog | sd:appendix_3_memory_map [2026/02/25 04:32] (current) – appledog | ||
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| | $01EF43–$01EF49 | 7 bytes | Extended Video System | VIDEO_COLOR_MODE, | | $01EF43–$01EF49 | 7 bytes | Extended Video System | VIDEO_COLOR_MODE, | ||
| | $01EF4A–$01EF7F | 54 bytes | FREE | Reserved for hardware expansion | | | $01EF4A–$01EF7F | 54 bytes | FREE | Reserved for hardware expansion | | ||
| - | | $01EF80–$01EFBF | 64 bytes | Sound System (4 voices) | 4 × SID-like voices (frequency, gate, ADSR, volume, etc.) | | + | | $01EF80–$01EFBF | 64 bytes | Sound System (4 voices) | see: [[Appendix 5 Sound System|SD-450 Sound System]] |
| | $01EFC0–$01EFFF | 64 bytes | FREE | Reserved for sound system expansion | | | $01EFC0–$01EFFF | 64 bytes | FREE | Reserved for sound system expansion | | ||
| | $01F000–$01F3E7 | 1,000 bytes | VM1_TEXT_BASE | Video Mode 1 – 40×25 text character map | | | $01F000–$01F3E7 | 1,000 bytes | VM1_TEXT_BASE | Video Mode 1 – 40×25 text character map | | ||
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