Previous Thread
Next Thread
Print Thread
Page 3 of 9 1 2 3 4 5 6 7 8 9
#75553 - 12/22/11 02:06 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
Sounds like there's probably a ROM in the disk drive that gets mapped at C000 then.

#75554 - 12/22/11 02:25 PM Re: T/A Alphatronic PC? [Re: R. Belmont]  
Joined: Jan 2005
Posts: 53
Spirantho Offline
Member
Spirantho  Offline
Member

Joined: Jan 2005
Posts: 53
Aberystwyth, Wales
Not that I can see. Here's a picture of the inside of the disk drive (I took photos when I took it apart to check the controller chip to work out how to dump it)...


Ian Gledhill
Check out our shop of 8-bit goodness http://www.mutant-caterpillar.co.uk/shop/
#75569 - 12/23/11 12:54 AM Re: T/A Alphatronic PC? [Re: Spirantho]  
Joined: Dec 2006
Posts: 519
mahlemiut Offline
Senior Member
mahlemiut  Offline
Senior Member

Joined: Dec 2006
Posts: 519
New Zealand
Now it's actually usable. You can type in and run BASIC programs now. Still a few keys missing, though.



- Barry Rodewald
#75570 - 12/23/11 01:34 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
Super cool how fast this shaped up smile

#75573 - 12/23/11 06:22 AM Re: T/A Alphatronic PC? [Re: Spirantho]  
Joined: Mar 2006
Posts: 995
Lord Nightmare Offline
Senior Member
Lord Nightmare  Offline
Senior Member

Joined: Mar 2006
Posts: 995
PA, USA
Spirantho: Can you take pictures, high res, of the disk drive board with no flash (use a bright room or a lamp aimed at board to light it)? I can't read the chip labels with the current picture. Also there appear to be a few more chips i can't see on the mainboard, under that brown-phenol modulator? board at the top right.

Also, I have a fluke 9010a z80 probe here and can probably extract the missing ipl rom (which I assume is on part of the 32k HN613256 rom at ic-1058) via that.
But it should also be possible to dump it by removing the z80 from the board and wiring the z80 socket data bus and address lines to that rom dumping apparatus you have on your amiga. Then just dump the address space piecemeal (in 8k chunks or whatever) by tying the z80 socket address lines high and low as appropriate and let the amiga drive the other address lines. Leave vcc unconnected from the amiga to the alphatronic though. (bad stuff like power feedback could happen otherwise)

LN


"When life gives you zombies... *CHA-CHIK!* ...you make zombie-ade!"
#75574 - 12/23/11 07:31 AM Re: T/A Alphatronic PC? [Re: Spirantho]  
Joined: Aug 2004
Posts: 1,324
Robbbert Offline
Very Senior Member
Robbbert  Offline
Very Senior Member

Joined: Aug 2004
Posts: 1,324
A question: how fast does the screen update? For us each letter appears one by one. At this stage I assume it all happens at once on the real machine.

#75576 - 12/23/11 10:34 AM Re: T/A Alphatronic PC? [Re: Spirantho]  
Joined: Aug 2004
Posts: 1,324
Robbbert Offline
Very Senior Member
Robbbert  Offline
Very Senior Member

Joined: Aug 2004
Posts: 1,324
Discovered 80-column mode. Type: WIDTH 80

It has a machine-monitor, type: MON
At the prompt press Enter. C to change/examine memory bytes; R to examine registers; E to exit.

It has disk commands, for example type: FILES

Next question. There is a COLOR command, you enter COLOR 1 thru 7. What I need to know, is what colour does each number produce?


Last edited by robbbert; 12/23/11 11:32 AM.
#75589 - 12/23/11 02:42 PM Re: T/A Alphatronic PC? [Re: Spirantho]  
Joined: Aug 2009
Posts: 1,127
Kale Online sleepy
Very Senior Member
Kale  Online Sleepy
Very Senior Member

Joined: Aug 2009
Posts: 1,127
Naples, Italy
Funnily enough, color 0 doesn't exist in this BASIC.


#75598 - 12/23/11 07:29 PM Re: T/A Alphatronic PC? [Re: Spirantho]  
Joined: Jan 2005
Posts: 53
Spirantho Offline
Member
Spirantho  Offline
Member

Joined: Jan 2005
Posts: 53
Aberystwyth, Wales
I'll not be able to check the colours till next week I'm afraid...
The other chips in the disk drive are all just 74LS ones I think - which in particular are you looking for? I don't want to take it apart if I can help it as it was a nightmare getting it back together last time!
As for dumping the spare (unused probably) 8K, I'd guess I can desolder it and dump it as if it were a 27128, tieing the high address line to Vcc...?
Fantastic work on the emulation!


Ian Gledhill
Check out our shop of 8-bit goodness http://www.mutant-caterpillar.co.uk/shop/
#75613 - 12/24/11 11:16 AM Re: T/A Alphatronic PC? [Re: Spirantho]  
Joined: Dec 2006
Posts: 519
mahlemiut Offline
Senior Member
mahlemiut  Offline
Senior Member

Joined: Dec 2006
Posts: 519
New Zealand
I've hooked up the 8251 USART and cassette, but the MAME i8251 core is missing implementation of receive/transmit data callbacks, so while the CSAVE command will work, it won't actually save anything to a cassette image, as nothing is yet fed to the cassette I/O.


- Barry Rodewald
Page 3 of 9 1 2 3 4 5 6 7 8 9

Who's Online Now
2 registered members (Bavarese, Pernod), 22 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: 14 (0.006s) Memory: 5.0266 MB (Peak: 5.2516 MB) Zlib enabled. Server Time: 2017-09-25 11:31:12 UTC