C65 ROM patch ("AI") - new BASIC 10 command "SVIC" (German and US version)

Inspired by this thread from ubik and combined with my archeology excavations in the C65 ROM I made a new patch "AI" for the 911001.bin

I have added a new BASIC 10 command SVIC (for set VIC).

SVIC 3 sets the VIC-III mode (with writing $A5 and $96 in KEY register $D02F)

SVIC 4 sets the VIC-IV mode (with writing $47 and $53 in KEY register $D02F)

Every other parameter between 0 and 255 will be ignored.

Numbers below 0 and above 255 causes an "?ILLEGAL QUANTITY ERROR".

Using SVIC 4 on the C65 (xc64 emulator) will be automatically ignored from the command routine, so there will be no crash because init the VIC-IV on C65.

You can use as parameter:

numbers: e.g. SVIC 3, SVIC 4, ...

formulas: e.g. SVIC (5-2), SVIC (2*2), ...

variables: e.g. IV=4: SVIC IV, ...

In the patch "AI" there are included all changes from patch "AH", so there is only one patch needed.

Because I was asked about the original english characterset in the patched ROM , I made two versions of the patch "AI":

911001_ai_ger.bin (with German umlauts as described here)

911001_ai_us.bin (with the original chars from the 911001 ROM)

For patching process see additionally the description in this post.

bspatch 911001.bin 911001_ai_ger.bin patch_ai_ger.bin for the "ger" version with umlauts.

or

bspatch 911001.bin 911001_ai_us.bin patch_ai_us.bin for the "us" version without umlauts.

Rename the build patch rom to MEGA65.ROM for the use on MEGA65 / Nexys board.

Zitat von ubik

whoa, nice one! 👍

Thanks!

I forgot to mention in the first post (and can't edit it anymore), that also - as usual in Commodore BASIC - the abbreviation "S+Shift V" can be used for the SVIC command.

Zitat von deft

That said, probably m65connect already is a convenient solution

Yes, building the patched ROM is a part of M65Connect:

You can load M65Connect from the MEGA65 filehost: MEGA65 filehost

It's in the folder "ShareFolder - Tools". Select the folder "Linux", "Mac" or "Window" depending what platform you are using.

There is only the need of the two patches "ai" (attached in the first post of this thread). They include all modification of my previous patches of the C65 ROM.

Edit:

Ok, this patch is for "look and feel": MEGA PET (a "look and feel" C65 ROM patch)

And this one to switch the internal disc unit number from 8 to 10: C65 patched Kernel to change Drive ID of internal drive from 8 to 10