(Fwd) RE: 1541IDE and 1541IDE-S

Date: 2007-11-30 18:43:07

Hallo allemaal,

A picture of the interface: http://www.baltissen.org/images/1541ide.jpg
Hardly to see but it is a 74LS138 on top of a 244 on top of a 245 on 
top of the 2nd 6522. The IDE connector is glued to the 40 pins custom IC.

So far things worked out fine :) I copied a floppy to the  harddisk and 
copied it back to another floppy. So far there is only one little flaw: it 
takes about 3 minutes to create an image and 4.5 to restore one :( 
IMHO I may blame the original routines of the 1541. When creating the image 
I can see the harddisk LED blink about four times a second, three times 
when restoring one. Saving is slower because the 1541 automatically 
performs a verify after te writing. I'm convinced that it can be done much 
much faster using your own loading/saving routines but I'm already very 
happy that this prooves that the idea on itself works.

http://www.baltissen.org/files/dc3.asm  = the assembler file
http://www.baltissen.org/files/dc3.bas  = the basic loader and executioner

z=0 : create an image
run2010 -> z=3 : restore an image

Remark: at this moment I can only save one image. The idea is asking first 
what image to use and then to alter some of the the numbers in the lines 
with DATA.

   / __|__
  / /  |_/     Groetjes, Ruud
  \ \__|_\
   \___|       http://Ruud.C64.org

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