Previous Thread
Next Thread
Print Thread
Page 2 of 9 1 2 3 4 5 6 7 8 9
#75509 - 12/21/11 09:46 AM Re: T/A Alphatronic PC? [Re: Spirantho]  
Joined: Aug 2004
Posts: 1,323
Robbbert Offline
Very Senior Member
Robbbert  Offline
Very Senior Member

Joined: Aug 2004
Posts: 1,323
Any chance of a photo of the screen just after it boots up?

#75519 - 12/21/11 03:27 PM Re: T/A Alphatronic PC? [Re: Robbbert]  
Joined: Jan 2005
Posts: 53
Spirantho Offline
Member
Spirantho  Offline
Member

Joined: Jan 2005
Posts: 53
Aberystwyth, Wales
Sure. Anything else, just ask. smile

Oh, the cursor line flashes, by the way.

www.mutant-caterpillar.co.uk/ian_stuff/TA_Boot.jpg


Last edited by Spirantho; 12/21/11 03:27 PM.

Ian Gledhill
Check out our shop of 8-bit goodness http://www.mutant-caterpillar.co.uk/shop/
#75535 - 12/22/11 03:25 AM Re: T/A Alphatronic PC? [Re: Spirantho]  
Joined: Dec 2006
Posts: 519
mahlemiut Online content
Senior Member
mahlemiut  Online Content
Senior Member

Joined: Dec 2006
Posts: 519
New Zealand
I noticed a set of DIP switches on the motherboard, any clue as to what they do?


- Barry Rodewald
#75538 - 12/22/11 07:14 AM Re: T/A Alphatronic PC? [Re: mahlemiut]  
Joined: Dec 2006
Posts: 519
mahlemiut Online content
Senior Member
mahlemiut  Online Content
Senior Member

Joined: Dec 2006
Posts: 519
New Zealand
Little bit of progress... smile

Last edited by mahlemiut; 12/22/11 07:35 AM. Reason: updated screenshot

- Barry Rodewald
#75540 - 12/22/11 07:40 AM Re: T/A Alphatronic PC? [Re: mahlemiut]  
Joined: Jul 2007
Posts: 4,590
Anna Wu Offline
Very Senior Member
Anna Wu  Offline
Very Senior Member

Joined: Jul 2007
Posts: 4,590
Nice smile

#75542 - 12/22/11 08:30 AM Re: T/A Alphatronic PC? [Re: mahlemiut]  
Joined: Jan 2005
Posts: 53
Spirantho Offline
Member
Spirantho  Offline
Member

Joined: Jan 2005
Posts: 53
Aberystwyth, Wales
Nice work!

There are two video outputs on the Alphatronic: one is RGB, one is mono (white). That may be related to the orangeness.

Incidentally, on the real thing if you press INS/DEL when it deleted (forward) the screen flickers, so don't be surprised if you get that too!


Ian Gledhill
Check out our shop of 8-bit goodness http://www.mutant-caterpillar.co.uk/shop/
#75543 - 12/22/11 08:49 AM Re: T/A Alphatronic PC? [Re: Spirantho]  
Joined: Jul 2007
Posts: 4,590
Anna Wu Offline
Very Senior Member
Anna Wu  Offline
Very Senior Member

Joined: Jul 2007
Posts: 4,590
@Spirantho

Do you have any ROM cartridges?

#75545 - 12/22/11 09:03 AM Re: T/A Alphatronic PC? [Re: Spirantho]  
Joined: Aug 2004
Posts: 1,323
Robbbert Offline
Very Senior Member
Robbbert  Offline
Very Senior Member

Joined: Aug 2004
Posts: 1,323
It's orange because i found a picture of the boot screen on another blog, and it was orange. But if its capable of colour, then we'll have to enable that as some sort of option.

At the moment the keyboard is being worked out.

When it attempts to scroll, the screen fills with rubbish, so there's a bug there.


How many cartslots does it have? The program checks A000 and C000 for a certain byte, and jumps to that address if found.

#75549 - 12/22/11 01:40 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 do actually have a ROM cartridge. The Alphatronic in this country (mine is actually branded Matmos as most are in this country as Matmos took over distribution) apparently came with a word-processing cartridge, which is what I have.
I don't know how to dump it directly as it is as it's in a little clear plastic case... not sure if I can open it. The 2764 (I think it is) inside it is soldered to the cart.
I may try and get an edge connector and a 28-pin socket, and wire it up that way if I can trace the tracks on the cart PCB.

There is only one cart slot, *but* there is also the disk port. When the disk drive is connected, the machine boots from the disk instead of ROM (I'm not sure what happens if no disk is present). This allows you to load Disk BASIC into the lower part of RAM instead of the ROM BASIC, and also allows you to boot straight into CP/M which uses the upper part of RAM, leaving the lower part free for CP/M programs.

You'll probably find that $A000 is for the cartridge, and $C000 is testing for the disk drive. There are no pin-outs in the manual for the disk connector but it's a custom 50-pin socket, so probably has access to the address and data lines of the machine too.

And before anyone asks, yes I do have the disk drive, and yes I do have working CP/M and Disk BASIC disks. smile I'm on my way to my parents' right now though so won't be able to do any more investigating until the end of the year.

Oh, I've not dumped the disks yet but it's on my list of things to do. The disk drive uses a standard PD765 chip it seems (as I expected it would).


Ian Gledhill
Check out our shop of 8-bit goodness http://www.mutant-caterpillar.co.uk/shop/
#75551 - 12/22/11 01:46 PM Re: T/A Alphatronic PC? [Re: Spirantho]  
Joined: Jul 2007
Posts: 4,590
Anna Wu Offline
Very Senior Member
Anna Wu  Offline
Very Senior Member

Joined: Jul 2007
Posts: 4,590
Quote:
And before anyone asks, yes I do have the disk drive, and yes I do have working CP/M and Disk BASIC disks.

Nice, because what I've read the internal Basic is not able to read disks. So Disc Basic is needed.

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

Who's Online Now
2 registered members (Reznor007, 1 invisible), 15 guests, and 4 spiders.
Key: Admin, Global Mod, Mod
Shout Box
Forum Statistics
Forums9
Topics8,411
Posts108,903
Members4,757
Most Online225
May 26th, 2014
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.030s Queries: 14 (0.007s) Memory: 5.0270 MB (Peak: 5.2534 MB) Zlib enabled. Server Time: 2017-09-20 21:58:57 UTC