Original author:

	Wojtek Wasilewski
	Bydgoszcz, POLAND
	wwasil@hvsag01.att.com




3. Porting programs from TIMEX floppy disks (5 1/4) to PC

I found way to port programs what I have recorded on TIMEX floppies to 
PC. The tricky part is that programs should be first converted to form
of BASIC loader + standard block(s) of CODE - I done it already porting 
them from tapes. Then method follows:

- add just before last RANDOMIZE USR .... line like:
  PAUSE 0 : SAVE * "FILENAME.TMX" CODE 16384,49152
- start program - memory dump will be recorded in FILENAME.TMX
- copy FILENAME.TMX to PC reading TIMEX disk using e.g 22DISK (see 
  attached definition)
- edit (binary) file to change to RAW format supported by "spconv"
  ('spconv' program is PD written by Henk de Groot.)
- convert file to necessary snapshot format using "spconv"

The structure of FILENAME.TMX, while on TIMEX disk is :

<     header    ><  memory dump   >
<03 00 C0 00 40 ><XX XX XX .... XX>     total length 49157 bytes
<    5 bytes    ><  49152 bytes   >

when copied to PC using 22DISK, somehow 251 bytes of 00 are appended,
so file structure is :

<     header    ><  memory dump  >< appended  >
<03 00 C0 00 40 ><XX XX XX.... XX><00 00 .. 00>  total length 49408 bytes
<    5 bytes    ><  49152 bytes  >< 251 bytes >

Format of RAW file is :

<           header         ><  memory dump   >
<03 00 C0 00 40 FF FF FF FF><XX XX XX .... XX>   total length 49161 bytes
<          9 bytes         ><  49152 bytes   >

Converting from TMX to RAW can be easily done using binary editor,
actually I wrote very simple BASIC program what is doing the job.




4. Definition of TIMEX disks for 22DISK (shareware by Sydex)

BEGIN TMX1  ZX Spectrum - TIMEX FDD (single sided)
DENSITY MFM ,LOW 
CYLINDERS 40
SIDES 1
SECTORS 16,256
SIDE1 0 0,7,14,5,12,3,10,1,8,15,6,13,4,11,2,9
BSH 3 BLM 7 EXM 0 DSM 143 DRM 127 AL0 11110000B AL1 0 OFS 4
END 

BEGIN TMX2  ZX Spectrum - TIMEX FDD (double sided)
DENSITY MFM ,LOW 
CYLINDERS 40
SIDES 2
SECTORS 16,256
SIDE1 0 0,7,14,5,12,3,10,1,8,15,6,13,4,11,2,9
SIDE2 0 0,7,14,5,12,3,10,1,8,15,6,13,4,11,2,9
ORDER EAGLE 
BSH 3 BLM 7 EXM 0 DSM 143 DRM 127 AL0 11110000B AL1 0 OFS 44
END