Coco: LOADM, CCC files, and a CocoSDC

[smbaker]

Granted, it's been more than 30 years since I've used a coco, so I'm just a little bit rusty...

I'm trying to program a CCC file into the Flash of a CocoSDC. I did the followiung:

10 CLEAR 200,&H3FFF ' RESERVE A 16K RAM BUFFER AT $4000
100 PRINT "DIAGS82"
110 LOADM "DIAG82.CCC",&H4000
120 KILL MEM @2
130 WRITE MEM @2,&H4000,&HC000,2048

As far as I can tell, the LOADM either does nothing, or it puts the data somewhere other than 0x4000. Doing a peek before and after the LOADM shows 0x4000 unchanged. Can anyone tell me what I'm doing wrong?

Thanks,
Scott

 

[smbaker]

Figured it out. Found the BIN format documented on the web and wrote a tiny python program:

It needs a 5-byte preamble (0x00, Len-Hi, Len-Lo, Addr-Hi, Addr-Lo) and a 5-byte postamble (0xFF, 0x00, 0x00, Exec-Hi, Exec-Lo)

#!/usr/bin/python
# Read Cartridge File from Stdin
# Write Bin file to stdout, loading at address 0x4000
# Scott Baker, http://www.smbaker.com/
import sys
data = sys.stdin.read()
l = len(data)
sys.stdout.write(chr(0))
sys.stdout.write(chr(l>>8))
sys.stdout.write(chr(l&0xFF))
sys.stdout.write(chr(0x40))
sys.stdout.write(chr(0x00))
sys.stdout.write(data)
sys.stdout.write(chr(0xFF))
sys.stdout.write(chr(0x00))
sys.stdout.write(chr(0x00))
sys.stdout.write(chr(0x40))
sys.stdout.write(chr(0x00))