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z80playground / cpm-fat

CP/M for the Z80 Playground that runs on the FAT disk format
GNU General Public License v3.0
20 stars 9 forks source link

Enable Gorilla Game #41

Closed gd-99 closed 3 years ago

gd-99 commented 3 years ago

Hi, recalling the GORILLA.BAS game released for QBasic I found a compiled GORILLA.COM version here: https://github.com/sblendorio/gorilla-cpm found under binary. Initially this wouldn't work using CP/M-FAT. The game will load but then bail out after selecting (3) ANSI terminal with a "Bad BDOS call 0069".

Looking up this BDOS call I found a reference here: http://members.iinet.net.au/~daveb/cpm/bdos.html where a reference to call 69 indicates BDOS function 69 - Get configuration table address. Supported by: CP/Net. Can't think why this would be compiled into the game? Could it be played over a network???

The solution: I have found using my implementation (no reason it shouldn't work on the Z80 Playground) of CP/M-FAT is to include the following code snip-it into DBOS.ASM around line 55 after the cp $66 block:

cp $69 ;BDOS function 69 - Get configuration table address jr z, return_255_in_a ;Supported by: CP/Net.

Recompile DBOS and copy over the bdos.bin file to the memory stick and Gorilla is good to go. Nice looking graphical game.

Enjoy...

Edited to reformat the code layout - the jr comes on the line after cp.

gd-99 commented 3 years ago

I missed you can have attachments so here are a couple of screen shots of Gorilla.com running on my z80... Gorilla1 Gorilla3

z80playground commented 3 years ago

Yes, I'll do this fix in the next release.

z80playground commented 3 years ago

It's fixed in release 1.09