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0c. Background bitmaps





; Load BG graphic



[003DD1] 3dd1 3A 9E C2    LD A,(C29Eh)     AF=01BB BC=0000 DE=C900 HL=2009 SP=CAFE IX=C880 IY=C800 V    P0=00000 P1=04000 P2=0C000 [ROM]

[003DD4] 3dd4 B7          OR A             AF=01BB BC=0000 DE=C900 HL=2009 SP=CAFE IX=C880 IY=C800 V    P0=00000 P1=04000 P2=0C000 [ROM]

[003DD5] 3dd5 20 04       JR NZ,3DDBh      AF=0100 BC=0000 DE=C900 HL=2009 SP=CAFE IX=C880 IY=C800 V    P0=00000 P1=04000 P2=0C000 [ROM]

[003DDB] 3ddb CD 6B 3E    CALL 3E6Bh       AF=0100 BC=0000 DE=C900 HL=2009 SP=CAFE IX=C880 IY=C800 V    P0=00000 P1=04000 P2=0C000 [ROM]



; Index limit (1..31)



[003E6B] 3e6b 3A 9E C2    LD A,(C29Eh)     AF=0100 BC=0000 DE=C900 HL=2009 SP=CAFC IX=C880 IY=C800 V    P0=00000 P1=04000 P2=0C000 [ROM]

[003E6E] 3e6e FE 20       CP 20h           AF=0100 BC=0000 DE=C900 HL=2009 SP=CAFC IX=C880 IY=C800 V    P0=00000 P1=04000 P2=0C000 [ROM]

[003E70] 3e70 38 16       JR C,3E88h       AF=01A3 BC=0000 DE=C900 HL=2009 SP=CAFC IX=C880 IY=C800 V    P0=00000 P1=04000 P2=0C000 [ROM]



; Index into table (8-byte structures)



[003E88] 3e88 87          ADD A,A          AF=01A3 BC=0000 DE=C900 HL=2009 SP=CAFC IX=C880 IY=C800 V    P0=00000 P1=04000 P2=0C000 [ROM]

[003E89] 3e89 87          ADD A,A          AF=0200 BC=0000 DE=C900 HL=2009 SP=CAFC IX=C880 IY=C800 V    P0=00000 P1=04000 P2=0C000 [ROM]

[003E8A] 3e8a 87          ADD A,A          AF=0400 BC=0000 DE=C900 HL=2009 SP=CAFC IX=C880 IY=C800 V    P0=00000 P1=04000 P2=0C000 [ROM]

[003E8B] 3e8b 6F          LD L,A           AF=0808 BC=0000 DE=C900 HL=2009 SP=CAFC IX=C880 IY=C800 V    P0=00000 P1=04000 P2=0C000 [ROM]

[003E8C] 3e8c 26 00       LD H,00h         AF=0808 BC=0000 DE=C900 HL=2008 SP=CAFC IX=C880 IY=C800 V    P0=00000 P1=04000 P2=0C000 [ROM]

[003E8E] 3e8e 11 C2 3E    LD DE,3EC2h      AF=0808 BC=0000 DE=C900 HL=0008 SP=CAFC IX=C880 IY=C800 V    P0=00000 P1=04000 P2=0C000 [ROM]

[003E91] 3e91 19          ADD HL,DE        AF=0808 BC=0000 DE=3EC2 HL=0008 SP=CAFC IX=C880 IY=C800 V    P0=00000 P1=04000 P2=0C000 [ROM]



; Byte 1 = bank



[003E92] 3e92 7E          LD A,(HL)        AF=0800 BC=0000 DE=3EC2 HL=3ECA SP=CAFC IX=C880 IY=C800 V    P0=00000 P1=04000 P2=0C000 [ROM]

[003E93] 3e93 32 FF FF    LD (FFFFh),A     AF=1000 BC=0000 DE=3EC2 HL=3ECA SP=CAFC IX=C880 IY=C800 V    P0=00000 P1=04000 P2=0C000 [ROM]



; Bytes 2/3 = data pointer



[003E96] 3e96 23          INC HL           AF=1000 BC=0000 DE=3EC2 HL=3ECA SP=CAFC IX=C880 IY=C800 V    P0=00000 P1=04000 P2=40000 [ROM]

[003E97] 3e97 7E          LD A,(HL)        AF=1000 BC=0000 DE=3EC2 HL=3ECB SP=CAFC IX=C880 IY=C800 V    P0=00000 P1=04000 P2=40000 [ROM]

[003E98] 3e98 23          INC HL           AF=0000 BC=0000 DE=3EC2 HL=3ECB SP=CAFC IX=C880 IY=C800 V    P0=00000 P1=04000 P2=40000 [ROM]

[003E99] 3e99 E5          PUSH HL          AF=0000 BC=0000 DE=3EC2 HL=3ECC SP=CAFC IX=C880 IY=C800 V    P0=00000 P1=04000 P2=40000 [ROM]

[003E9A] 3e9a 66          LD H,(HL)        AF=0000 BC=0000 DE=3EC2 HL=3ECC SP=CAFA IX=C880 IY=C800 V    P0=00000 P1=04000 P2=40000 [ROM]

[003E9B] 3e9b 6F          LD L,A           AF=0000 BC=0000 DE=3EC2 HL=80CC SP=CAFA IX=C880 IY=C800 V    P0=00000 P1=04000 P2=40000 [ROM]



; Copy data ($10)



[003E9C] 3e9c 11 40 C2    LD DE,C240h      AF=0000 BC=0000 DE=3EC2 HL=8000 SP=CAFA IX=C880 IY=C800 V    P0=00000 P1=04000 P2=40000 [ROM]

[003E9F] 3e9f 01 10 00    LD BC,0010h      AF=0000 BC=0000 DE=C240 HL=8000 SP=CAFA IX=C880 IY=C800 V    P0=00000 P1=04000 P2=40000 [ROM]

[003EA2] 3ea2 ED B0       LDIR             AF=0000 BC=0010 DE=C240 HL=8000 SP=CAFA IX=C880 IY=C800 V    P0=00000 P1=04000 P2=40000 [ROM]



[003EA4] 3ea4 21 41 3E    LD HL,3E41h      AF=0000 BC=0000 DE=C250 HL=8010 SP=CAFA IX=C880 IY=C800 V    P0=00000 P1=04000 P2=40000 [ROM]

[003EA7] 3ea7 0E 08       LD C,08h         AF=0000 BC=0000 DE=C250 HL=3E41 SP=CAFA IX=C880 IY=C800 V    P0=00000 P1=04000 P2=40000 [ROM]

[003EA9] 3ea9 ED B0       LDIR             AF=0000 BC=0008 DE=C250 HL=3E41 SP=CAFA IX=C880 IY=C800 V    P0=00000 P1=04000 P2=40000 [ROM]

[003EAB] 3eab E1          POP HL           AF=0028 BC=0000 DE=C258 HL=3E49 SP=CAFA IX=C880 IY=C800 V    P0=00000 P1=04000 P2=40000 [ROM]



; Bytes 4/5 = bitmap offset



[003EAC] 3eac 23          INC HL           AF=0028 BC=0000 DE=C258 HL=3ECC SP=CAFC IX=C880 IY=C800 V    P0=00000 P1=04000 P2=40000 [ROM]

[003EAD] 3ead 7E          LD A,(HL)        AF=0028 BC=0000 DE=C258 HL=3ECD SP=CAFC IX=C880 IY=C800 V    P0=00000 P1=04000 P2=40000 [ROM]

[003EAE] 3eae 23          INC HL           AF=2028 BC=0000 DE=C258 HL=3ECD SP=CAFC IX=C880 IY=C800 V    P0=00000 P1=04000 P2=40000 [ROM]

[003EAF] 3eaf E5          PUSH HL          AF=2028 BC=0000 DE=C258 HL=3ECE SP=CAFC IX=C880 IY=C800 V    P0=00000 P1=04000 P2=40000 [ROM]

[003EB0] 3eb0 66          LD H,(HL)        AF=2028 BC=0000 DE=C258 HL=3ECE SP=CAFA IX=C880 IY=C800 V    P0=00000 P1=04000 P2=40000 [ROM]

[003EB1] 3eb1 6F          LD L,A           AF=2028 BC=0000 DE=C258 HL=80CE SP=CAFA IX=C880 IY=C800 V    P0=00000 P1=04000 P2=40000 [ROM]



; Decode to VRAM



[003EB2] 3eb2 11 00 40    LD DE,4000h      AF=2028 BC=0000 DE=C258 HL=8020 SP=CAFA IX=C880 IY=C800 V    P0=00000 P1=04000 P2=40000 [ROM]

[003EB5] 3eb5 CD B3 04    CALL 04B3h       AF=2028 BC=0000 DE=4000 HL=8020 SP=CAFA IX=C880 IY=C800 V    P0=00000 P1=04000 P2=40000 [ROM]

[003EB8] 3eb8 E1          POP HL           AF=0044 BC=0000 DE=4004 HL=8F16 SP=CAFA IX=C880 IY=C800      P0=00000 P1=04000 P2=40000 [ROM]



; ___________________________________________________________________



We probably need more room to safely fit in the full script and lists.

So some recompression will help out. Might free ~$200 per bg.



Sample bitmaps @ 3EC2h:

 0. ?? ???? ????  ?? ????

 1. 10 8000 8020  0F 8000

 2. 10 8F16 8F36  0F 8333

 3. 10 9C72 9C82  0F 86E9

 4. 10 9C72 9C82  0F 89A0 (*)

 *. 10 A8F6 B3F5  (???)

 5. 10 B3F6 B406  0F 8C80

 *. 10 BAD8-BFE3  (Font)

 6. 10 8010 8020  0F 8E46 (*)

 7. 10 8000 8020  0F 9116 (*)



 8. 11 8640 8650  0F 947B

 9. 11 97C4 97D4  0F 970A

10. 11 A4B1 A4C1  0F 9A2C

11. 11 AF58 AF68  0F 9C11

 *. 11 B94A BFFF  (???)

12. 10 8F26 8F36  0F 8333 (*)



; -----------------------------------



13. 16 AC7D AC8D  16 BC32

14. 0B 8000 8010  16 BE2A

15. 16 3FC2 AC8D  16 BC32 (*)



16. 17 AA9F AB6F  17 8000

17. 17 AAAF AB6F  17 831E (*)

18. 17 AABF AB6F  17 8654 (*)

19. 17 AACF AB6F  17 88DD (*)

20. 17 AADF AB6F  17 8BA6 (*)

21. 17 AAEF AB6F  17 8F8E (*)

22. 17 AAFF AB6F  17 92ED (*)

23. 17 AB0F AB6F  17 961B (*)

24. 17 AB1F AB6F  17 9949 (*)

25. 17 AB2F AB6F  17 9CA3 (*)

26. 17 AB3F AB6F  17 9FE3 (*)

27. 17 AB4F AB6F  17 A310 (*)

28. 17 AB5F AB6F  17 A64C (*)



29. 09 BB14 BB24  09 B78B

30. 14 A4DA A4EA  1B BD63

31. 13 8000 8010  0D BDB1