Previous Thread
Next Thread
Print Thread
Page 6 of 9 1 2 3 4 5 6 7 8 9
#110303 - 07/15/17 01:37 PM Re: T/A Alphatronic PC? [Re: Spirantho]  
Joined: Mar 2001
Posts: 15,710
R. Belmont Offline
R. Belmont  Offline

Very Senior Member

Joined: Mar 2001
Posts: 15,710
USA
I'll look at getting this going next.

#110308 - 07/16/17 01:21 AM Re: T/A Alphatronic PC? [Re: Spirantho]  
Joined: Mar 2001
Posts: 15,710
R. Belmont Offline
R. Belmont  Offline

Very Senior Member

Joined: Mar 2001
Posts: 15,710
USA
Ok, with the extra port definitions things make much more sense.

At boot, the BASIC ROMs are mapped from 0000-5FFF and the first 4k of the Monitor ROM is at F000, at which point you get a coherent boot process. We've had the IPL all along, time to blow up this driver and introduce bankdev.

#110319 - 07/16/17 09:00 PM Re: T/A Alphatronic PC? [Re: Spirantho]  
Joined: Jan 2012
Posts: 726
rfka01 Offline
Senior Member
rfka01  Offline
Senior Member

Joined: Jan 2012
Posts: 726
Bavaria
TeamE has dumped the ROMs of my second Alphatronic PC by unsoldering the 32K ROM. Remember that's the machine with the graphics extension, so at least one of the three ROMs is altered to reflect that.

https://mega.nz/#!WdYFyQQQ!NLwZIfvo_vh_ZRbcZwzq28nZdOnZprzwWfJ9rLfD1lI


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
#110321 - 07/16/17 11:26 PM Re: T/A Alphatronic PC? [Re: Spirantho]  
Joined: Mar 2001
Posts: 15,710
R. Belmont Offline
R. Belmont  Offline

Very Senior Member

Joined: Mar 2001
Posts: 15,710
USA
Nice! I have the Alphatronic booting into ROM BASIC and working without the previous hacks to simulate the IPL, and with the correct "blanking" and "vblank" inputs instead of the synthetic timer. Now to attempt floppies.

#110328 - 07/17/17 12:58 PM Re: T/A Alphatronic PC? [Re: Spirantho]  
Joined: Mar 2001
Posts: 15,710
R. Belmont Offline
R. Belmont  Offline

Very Senior Member

Joined: Mar 2001
Posts: 15,710
USA
Is there anything else in the drive add-on manual that listed the ports? The disk boot code polls port F9 a lot, which isn't listed. It seems to want bit 6 to be set when there's data available and bit 7 when it's safe to stuff things into the FIFO, which doesn't seem to match any of the registers that upd765.cpp makes available.

#110332 - 07/17/17 03:58 PM Re: T/A Alphatronic PC? [Re: Spirantho]  
Joined: Jan 2012
Posts: 726
rfka01 Offline
Senior Member
rfka01  Offline
Senior Member

Joined: Jan 2012
Posts: 726
Bavaria
RB, did you just look at my quick & dirty port list or at the actual manual?

https://mega.nz/#!mEx0GZCK!vhF5y5uzesXsshSgNVAWQXvdVoEfyH5bkK5Sjg6Cm1Y

The appendix with just the technical information is here (smaller archive):

https://mega.nz/#!6JYniboZ!5l62IDTbfeGunpKV_zJzONxinOfDZfm-WI0yK9I-nZk


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
#110334 - 07/17/17 04:45 PM Re: T/A Alphatronic PC? [Re: R. Belmont]  
Joined: Jan 2012
Posts: 671
crazyc Offline
Senior Member
crazyc  Offline
Senior Member

Joined: Jan 2012
Posts: 671
Originally Posted by R. Belmont
Is there anything else in the drive add-on manual that listed the ports? The disk boot code polls port F9 a lot, which isn't listed. It seems to want bit 6 to be set when there's data available and bit 7 when it's safe to stuff things into the FIFO, which doesn't seem to match any of the registers that upd765.cpp makes available.

That's the status register. Bit 6 is direction, high means to master, low to device. Bit 7 is request for attention.

#110335 - 07/17/17 06:01 PM Re: T/A Alphatronic PC? [Re: Spirantho]  
Joined: Mar 2001
Posts: 15,710
R. Belmont Offline
R. Belmont  Offline

Very Senior Member

Joined: Mar 2001
Posts: 15,710
USA
Is that the msr_r? I already map that at F0.

#110338 - 07/17/17 07:24 PM Re: T/A Alphatronic PC? [Re: Spirantho]  
Joined: Jan 2012
Posts: 671
crazyc Offline
Senior Member
crazyc  Offline
Senior Member

Joined: Jan 2012
Posts: 671
Maybe there's a error in the manual? What you describe definitely looks to be msr_r.

#110339 - 07/17/17 07:48 PM Re: T/A Alphatronic PC? [Re: Spirantho]  
Joined: Mar 2001
Posts: 15,710
R. Belmont Offline
R. Belmont  Offline

Very Senior Member

Joined: Mar 2001
Posts: 15,710
USA
I'll check the complete manual later, maybe it's wrong somehow.

Page 6 of 9 1 2 3 4 5 6 7 8 9

Who's Online Now
6 registered members (Bavarese, Pernod, Kale, Duke, TeamE, 1 invisible), 17 guests, and 4 spiders.
Key: Admin, Global Mod, Mod
Shout Box
Forum Statistics
Forums9
Topics8,412
Posts108,939
Members4,757
Most Online225
May 26th, 2014
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.032s Queries: 15 (0.010s) Memory: 5.0257 MB (Peak: 5.2711 MB) Zlib enabled. Server Time: 2017-09-25 11:24:05 UTC