CHAIN ASSET LOAD
Posted: Thu Apr 18, 2024 12:34 am
Demonstrates Using the LOAD command in a BASIC program and the communications buffer at 0:BF00 to pass a string between Loaded Programs. Allows loading assets to VRAM, BRAM golden Ram on startup without having those routines take memory from your program. Each time LOAD Is invoked the LOAD.ed module has ALL low Ram to itself. To just do what this example does it's really not necessary, but this is to make the technique clear.
This example chains two programs. KENNEDY.PRG is the main program to LOAD --> RUN (You'll know why its called Kennedy).
LOAD goes like this.
KENNEDY --> Puts it's name in at 0:BF00 --> LOADS --> LOADASSETS
LOADASSETS --> BLOADS KENNEDY.ZCM in Banked RAM. --> LOADS ZSMLOADER
ZSMLOADER --> Checks 0:BF00 for a valid file name (the main program) --> LOADS and Initializes ZSMKIT
(MooingLemur's sound driver/player). Will create ZSMKIT binary if not found.
---> PLACES THE MESSAGE "ZSMLOADED" or "ZSMFAILED" at 0:BF00
then LOADS (the program found previously at 0:BF00).
KENNEDY --> finds that ZSMKIT is loaded and plays the ZCM file and exits.
I'M NOT SURE WHY I'M HAVING PROBLEMS WITH TRYIT NOW. WHEN YOU GET TO THE EMULATOR WINDOW
LOAD "KENNEDY.PRG" RUN
Try It Now!
THE CODE:
This example chains two programs. KENNEDY.PRG is the main program to LOAD --> RUN (You'll know why its called Kennedy).
LOAD goes like this.
KENNEDY --> Puts it's name in at 0:BF00 --> LOADS --> LOADASSETS
LOADASSETS --> BLOADS KENNEDY.ZCM in Banked RAM. --> LOADS ZSMLOADER
ZSMLOADER --> Checks 0:BF00 for a valid file name (the main program) --> LOADS and Initializes ZSMKIT
(MooingLemur's sound driver/player). Will create ZSMKIT binary if not found.
---> PLACES THE MESSAGE "ZSMLOADED" or "ZSMFAILED" at 0:BF00
then LOADS (the program found previously at 0:BF00).
KENNEDY --> finds that ZSMKIT is loaded and plays the ZCM file and exits.
I'M NOT SURE WHY I'M HAVING PROBLEMS WITH TRYIT NOW. WHEN YOU GET TO THE EMULATOR WINDOW
LOAD "KENNEDY.PRG" RUN
Try It Now!
THE CODE: