C65 ROM patch ("AH") with German umlauts also for Mega65

Snoopy · Jul 20th 2020

Because there were problems with the german umlauts of patch "AE" while using Mega65 mode (or Nexys board or xmega65 of Xemu), I patched a new version "AH" of the C65 ROM (911001.bin):

The patch includes all previous patches (until "AG" which fixed the "disc change bug").

To get the patched ROM see steps 1.) to 4.) in this post: Patch for C65 ROM

...

5.) Patch the file with this command:

bspatch 911001.bin 911001_ah.bin patch_ah.bin

6.) The created file '911001_ah.bin' is the patched rom and you can rename and use it for your needs. E.g. for Xemu 'c65-system.rom' or 'MEGA65.ROM' for Mega65 or the Nexys board.

As Paul mentioned in this post, the chars which uses Mega65 are copied from the C64 char set section of the C65 ROM. So I changed the chars also in the C64 section.

Now you can use the german umlauts also in Mega65 mode and even in the C64 mode (after GO 64):

For convenience I quote from from the manual for the C65 Notepad for describing the keys for the german umlauts:

Here is the text file with the changes made in patch "AH" against the original ROM (911001.bin):

Code

Comparing files 911001.bin and 911001_ah.bin
00001CCD: 83 80 ; change address of status bit0 for dc check in "disc change routine" to $D080 instead of $D083
00001E1C: EE EA ; replace INC $D020
00001E1D: 20 EA ; (change border color if disc error)
00001E1E: D0 EA ; with three NOPs so border don't change color
00004001: 14 00 ; fill area from $04000 to $07000 with $00
00004002: 20 00 ; deletes the demo programs stored in ROM 911001.bin
[...]
00006FFF: FF 00
00007000: FF 00
00009380: 00 66 ; change chars in C65 char set 1 for umlauts
00009381: 00 18
00009382: 00 3C
00009383: 1F 66
00009384: 1F 7E
00009385: 18 66
00009386: 18 66
00009387: 18 00
00009388: 18 1C
00009389: 18 36
0000938A: 18 30
0000938B: FF 7E
0000938C: FF 30
0000938D: 00 36
0000938E: 00 1C
000093C0: FF 66
000093C1: FF 00
000093C2: FF 66
000093C3: 00 66
000093C4: 00 66
000093C5: 00 66
000093C6: 00 3C
000093C8: 00 66
000093C9: 00 3C
000093CA: 00 66
000093CB: 00 66
000093CC: 00 66
000093CD: FF 66
000093CE: FF 3C
000093CF: FF 00
00009780: FF 99 ; change chars in C65 char set 2 for umlauts
00009781: FF E7
00009782: FF C3
00009783: E0 99
00009784: E0 81
00009785: E7 99
00009786: E7 99
00009787: E7 FF
00009788: E7 E3
00009789: E7 C9
0000978A: E7 CF
0000978B: 00 81
0000978C: 00 CF
0000978D: FF C9
0000978E: FF E3
000097C0: 00 99
000097C1: 00 FF
000097C2: 00 99
000097C3: FF 99
000097C4: FF 99
000097C5: FF 99
000097C6: FF C3
000097C8: FF 99
000097C9: FF C3
000097CA: FF 99
000097CB: FF 99
000097CC: FF 99
000097CD: 00 99
000097CE: 00 C3
000097CF: 00 FF
000098E0: 0C 38
000098E1: 12 6C
000098E2: 30 6C
000098E3: 7C 78
000098E4: 30 6C
000098E5: 62 6C
000098E6: FC 78
000098E7: 00 60
00009B68: 18 66
00009B6A: 18 3C
00009B6B: 1F 66
00009B6C: 1F 7E
00009B6D: 00 66
00009B6E: 00 66
00009B70: 00 3C
00009B71: 00 66
00009B72: 00 66
00009B73: F8 7C
00009B74: F8 66
00009B75: 18 66
00009B76: 18 7C
00009B77: 18 60
00009B80: 00 66
00009B82: 00 3C
00009B83: 1F 06
00009B84: 1F 3E
00009B85: 18 66
00009B86: 18 3E
00009B87: 18 00
00009B88: 18 1C
00009B89: 18 36
00009B8A: 18 30
00009B8B: FF 7E
00009B8C: FF 30
00009B8D: 00 36
00009B8E: 00 1C
00009BA8: E0 66
00009BA9: E0 00
00009BAA: E0 66
00009BAB: E0 66
00009BAC: E0 66
00009BAD: E0 66
00009BAE: E0 3C
00009BAF: E0 00
00009BB0: 07 66
00009BB1: 07 3C
00009BB2: 07 66
00009BB3: 07 66
00009BB4: 07 66
00009BB5: 07 66
00009BB6: 07 3C
00009BB7: 07 00
00009BC0: FF 00
00009BC1: FF 66
00009BC2: FF 00
00009BC3: 00 66
00009BC4: 00 66
00009BC5: 00 66
00009BC6: 00 3C
00009BC8: 00 66
00009BCA: 00 3C
00009BCB: 00 66
00009BCC: 00 66
00009BCD: FF 66
00009BCE: FF 3C
00009BCF: FF 00
00009F68: E7 99
00009F6A: E7 C3
00009F6B: E0 99
00009F6C: E0 81
00009F6D: FF 99
00009F6E: FF 99
00009F70: FF C3
00009F71: FF 99
00009F72: FF 99
00009F73: 07 83
00009F74: 07 99
00009F75: E7 99
00009F76: E7 83
00009F77: E7 9F
00009F80: FF 99
00009F82: FF C3
00009F83: E0 F9
00009F84: E0 C1
00009F85: E7 99
00009F86: E7 C1
00009F87: E7 FF
00009F88: E7 E3
00009F89: E7 C9
00009F8A: E7 CF
00009F8B: 00 81
00009F8C: 00 CF
00009F8D: FF C9
00009F8E: FF E3
00009FA8: 1F 99
00009FA9: 1F FF
00009FAA: 1F 99
00009FAB: 1F 99
00009FAC: 1F 99
00009FAD: 1F 99
00009FAE: 1F C3
00009FAF: 1F FF
00009FB0: F8 99
00009FB1: F8 C3
00009FB2: F8 99
00009FB3: F8 99
00009FB4: F8 99
00009FB5: F8 99
00009FB6: F8 C3
00009FB7: F8 FF
00009FC0: 00 FF
00009FC1: 00 99
00009FC2: 00 FF
00009FC3: FF 99
00009FC4: FF 99
00009FC5: FF 99
00009FC6: FF C3
00009FC8: FF 99
00009FCA: FF C3
00009FCB: FF 99
00009FCC: FF 99
00009FCD: 00 99
00009FCE: 00 C3
00009FCF: 00 FF
0000D380: 00 66 ; change chars in C64 char set 1 for umlauts
0000D381: 00 18
0000D382: 00 3C
0000D383: 1F 66
0000D384: 1F 7E
0000D385: 18 66
0000D386: 18 66
0000D387: 18 00
0000D388: 18 1C
0000D389: 18 36
0000D38A: 18 30
0000D38B: FF 7E
0000D38C: FF 30
0000D38D: 00 36
0000D38E: 00 1C
0000D3C0: FF 66
0000D3C1: FF 00
0000D3C2: FF 66
0000D3C3: 00 66
0000D3C4: 00 66
0000D3C5: 00 66
0000D3C6: 00 3C
0000D3C8: 00 66
0000D3C9: 00 3C
0000D3CA: 00 66
0000D3CB: 00 66
0000D3CC: 00 66
0000D3CD: FF 66
0000D3CE: FF 3C
0000D3CF: FF 00
0000D780: FF 99 ; change chars in C64 char set 2 for umlauts
0000D781: FF E7
0000D782: FF C3
0000D783: E0 99
0000D784: E0 81
0000D785: E7 99
0000D786: E7 99
0000D787: E7 FF
0000D788: E7 E3
0000D789: E7 C9
0000D78A: E7 CF
0000D78B: 00 81
0000D78C: 00 CF
0000D78D: FF C9
0000D78E: FF E3
0000D7C0: 00 99
0000D7C1: 00 FF
0000D7C2: 00 99
0000D7C3: FF 99
0000D7C4: FF 99
0000D7C5: FF 99
0000D7C6: FF C3
0000D7C8: FF 99
0000D7C9: FF C3
0000D7CA: FF 99
0000D7CB: FF 99
0000D7CC: FF 99
0000D7CD: 00 99
0000D7CE: 00 C3
0000D7CF: 00 FF
0000DB68: 18 66
0000DB6A: 18 3C
0000DB6B: 1F 66
0000DB6C: 1F 7E
0000DB6D: 00 66
0000DB6E: 00 66
0000DB70: 00 3C
0000DB71: 00 66
0000DB72: 00 66
0000DB73: F8 7C
0000DB74: F8 66
0000DB75: 18 66
0000DB76: 18 7C
0000DB77: 18 60
0000DB80: 00 66
0000DB82: 00 3C
0000DB83: 1F 06
0000DB84: 1F 3E
0000DB85: 18 66
0000DB86: 18 3E
0000DB87: 18 00
0000DB88: 18 1C
0000DB89: 18 36
0000DB8A: 18 30
0000DB8B: FF 7E
0000DB8C: FF 30
0000DB8D: 00 36
0000DB8E: 00 1C
0000DBA8: E0 66
0000DBA9: E0 00
0000DBAA: E0 66
0000DBAB: E0 66
0000DBAC: E0 66
0000DBAD: E0 66
0000DBAE: E0 3C
0000DBAF: E0 00
0000DBB0: 07 66
0000DBB1: 07 3C
0000DBB2: 07 66
0000DBB3: 07 66
0000DBB4: 07 66
0000DBB5: 07 66
0000DBB6: 07 3C
0000DBB7: 07 00
0000DBC0: FF 00
0000DBC1: FF 66
0000DBC2: FF 00
0000DBC3: 00 66
0000DBC4: 00 66
0000DBC5: 00 66
0000DBC6: 00 3C
0000DBC8: 00 66
0000DBCA: 00 3C
0000DBCB: 00 66
0000DBCC: 00 66
0000DBCD: FF 66
0000DBCE: FF 3C
0000DBCF: FF 00
0000DF68: E7 99
0000DF6A: E7 C3
0000DF6B: E0 99
0000DF6C: E0 81
0000DF6D: FF 99
0000DF6E: FF 99
0000DF70: FF C3
0000DF71: FF 99
0000DF72: FF 99
0000DF73: 07 83
0000DF74: 07 99
0000DF75: E7 99
0000DF76: E7 83
0000DF77: E7 9F
0000DF80: FF 99
0000DF82: FF C3
0000DF83: E0 F9
0000DF84: E0 C1
0000DF85: E7 99
0000DF86: E7 C1
0000DF87: E7 FF
0000DF88: E7 E3
0000DF89: E7 C9
0000DF8A: E7 CF
0000DF8B: 00 81
0000DF8C: 00 CF
0000DF8D: FF C9
0000DF8E: FF E3
0000DFA8: 1F 99
0000DFA9: 1F FF
0000DFAA: 1F 99
0000DFAB: 1F 99
0000DFAC: 1F 99
0000DFAD: 1F 99
0000DFAE: 1F C3
0000DFAF: 1F FF
0000DFC0: 00 FF
0000DFC1: 00 99
0000DFC2: 00 FF
0000DFC3: FF 99
0000DFC4: FF 99
0000DFC5: FF 99
0000DFC6: FF C3
0000DFC8: FF 99
0000DFCA: FF C3
0000DFCB: FF 99
0000DFCC: FF 99
0000DFCD: 00 99
0000DFCE: 00 C3
0000DFCF: 00 FF
0000E47C: 2A 20 ; change text passage in start message of C64 mode
0000E47D: 20 43 ; from "* COMMODORE 64 BASIC V2 *"
0000E47E: 43 4F ; to " COMMODORE 64 BASIC V2.2 "
0000E47F: 4F 4D
0000E481: 4D 4F
0000E482: 4F 44
0000E483: 44 4F
0000E484: 4F 52
0000E485: 52 45
0000E486: 45 20
0000E487: 20 36
0000E488: 36 34
0000E489: 34 20
0000E48A: 20 42
0000E48B: 42 41
0000E48C: 41 53
0000E48D: 53 49
0000E48E: 49 43
0000E48F: 43 20
0000E490: 20 56
0000E491: 56 32
0000E492: 32 2E
0000E493: 20 32
0000E494: 2A 20
000120CB: 80 FF ; set top of bank 0 to $FF00 (instead of $8000)
000120D5: 80 F8 ; set top of bank 1 to $F800 (instead of $8000)
00012281: 20 56 ; shift display of ROM version number one digit left
00012282: 56 30 ; and add '.AH' at the end
00012283: 30 2E ; for displaying patch number
00012284: 2E 39
00012285: 39 42
00012286: 42 2E
00012287: 2E 39
00012288: 39 31
0001228A: 31 30
0001228C: 30 31
0001228D: 31 2E
0001228E: 20 41
0001228F: 20 48
0001FDBE: 45 55 ; change keyboard text in start messages
0001FDBF: 4E 53 ; from "ENGLISH KEYBOARD"
0001FDC0: 47 20 ; to "US KEYB/GER CHAR"
0001FDC1: 4C 4B
0001FDC2: 49 45
0001FDC3: 53 59
0001FDC4: 48 42
0001FDC5: 20 2F
0001FDC6: 4B 47
0001FDC8: 59 52
0001FDC9: 42 20
0001FDCA: 4F 43
0001FDCB: 41 48
0001FDCC: 52 41
0001FDCD: 44 52

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12345 · Jul 25th 2020

Hi Snoopy

First of all great work and highly appreciated! I even think its that useful I would like to implement it in the GUI tool I'm currently writing for the Mega65. I would therefore need the executables (bin/patch) and would have also some questions... If interested, please pin me!

adtbm · Jul 25th 2020

Hi Snoopy,
12345 is part of the MEGA65 team, if you're interested, you can also send me an mail: adtbm@freenet.de then we could arrange a faster communication path. (Skype ? / Discord ? )

Snoopy · Jul 25th 2020

Quote from 12345

Hi Snoopy

First of all great work and highly appreciated! I even think its that useful I would like to implement it in the GUI tool I'm currently writing for the Mega65. I would therefore need the executables (bin/patch) and would have also some questions... If interested, please pin me!

Hi 12345, thanks for asking! Of course you can use the patch for your work for the Mega65! I'm very glad if I can make a small contribution to the Mega team.

I'm very busy this weekend. so please don't expect a 5 minute fast answer, but feel free to write me a mail to 65software@gmx.de

adtbm Dec 26th 2020