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mikey

Member Since 19 Jan 2004
OFFLINE Last Active Feb 8 2012 3:32 PM

Posts I've Made

In Topic: Understanding Atari floppy drive timing

Sun Feb 5, 2012 11:56 PM

View PostBryan, on Wed Jan 11, 2012 10:04 PM, said:

I'm just curious to find where it stuffs the timer value that's supposed to simulate one disk rotation.

Hi, Bryan
There ...

1610	 LDA #$D2	   for timeout
1620 F1T1 BIT DRA	   write 1 byte 00 at DRQ
1630	 BPL F1T1
1640	 STY DATREG
1650 F1T2 BIT DRA	   another byte 00
1660	 BPL F1T2
1670	 STY DATREG
1680	 STA T1024I  start timer

$d2*1024 cycles (1024T timer) gives 215040 usecs, that would be about 0,21 sec.
At 288 rpm there's 4,8 rotation per second which gives one rotation time of 0,208 sec
Sounds legit :) Correct me if I am wrong :)

In Topic: FAT32 XEX loader

Fri Dec 16, 2011 1:21 PM

View Postkurtm, on Wed Jul 20, 2011 3:10 PM, said:

View PostStephen, on Wed Jul 20, 2011 3:05 PM, said:

View Postremowilliams, on Wed Jul 20, 2011 10:49 AM, said:

View Postflashjazzcat, on Wed Jul 20, 2011 10:43 AM, said:

What's the best way of getting two or more simple, primary partitions in an MBR table?

Linux?
And for the remaining 95% of the users? :P

OpenBSD :P

too secure to even boot :)

In Topic: 1050E and ICD US Doubler

Sun Dec 11, 2011 1:47 PM

Yeah, that's great. We're not competing though :) The more hardware, the merrier :)

In Topic: 1050E and ICD US Doubler

Sun Dec 11, 2011 3:10 AM

Hey after quite a while :)
University work got in the way of development, I'm sorry for the delay.
I am reinstating work on the project, n eed some more time but the end is closer.
If anyone got fed up with waiting for the 1050E firmware, then sorry - it's all my fault.
But now future looks promising. Stay tuned

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