Search found 20 matches

by acory
Wed May 09, 2018 11:37 pm
Forum: acorn atom and system
Topic: Atom Cyborg Project
Replies: 4
Views: 666

Re: Atom Cyborg Project

Just a very quick request. The project is progressing and I will post an update very soon. I need a copy of the SYSTEM and BASIC ROMs. I took a copy of the SYSTEM ROM from hoglets VHDL code, and re-jigged the hex values into the Xilinx COE format. After some debugging, and thanks to the built in tra...
by acory
Tue Apr 24, 2018 10:39 pm
Forum: acorn atom and system
Topic: Atom Cyborg Project
Replies: 4
Views: 666

Atom Cyborg Project

I posted in a Papilio FPGA forum a question concerning an Atom project I am working on. Dave (hoglet) suggested that I should post some details in this forum... I bought a Papilio FPGA (well both the One and the Pro) with the intention of improving my RTL skills. I was already aware of Hoglets Atom ...
by acory
Sun Nov 13, 2016 8:45 pm
Forum: acorn atom and system
Topic: Atom Software Archive
Replies: 1210
Views: 129718

Re: Atom Software Archive

Hi Kees, Many thanks for taking the time to identify. There are other programs including my owm Atom Basic compiler, GAZDOS (8 inch floppy OS) and space invaders (which I want to finish off albeit 35 years late :shock: ). The PCW files are almost certainly type in programs from the magazine Personal...
by acory
Sat Nov 12, 2016 10:49 pm
Forum: acorn atom and system
Topic: Atom Software Archive
Replies: 1210
Views: 129718

Re: Atom Software Archive

I have now CATted a few of my old Atom tapes. I suspect a lof of this software is already well known about. First is a list from a tape labelled "Acornsoft". I have no idea where I got the software from. STARGATE. 4-ROW. BREAKOUT. DOGFIGHT. LUNAR LANDER. DODGEMS. INVADERS. OTHELLO. ROBOTS. RAT TRAP....
by acory
Thu Nov 03, 2016 12:46 am
Forum: acorn atom and system
Topic: ATOM FPGA
Replies: 446
Views: 50231

Re: ATOM FPGA

Hi Dave, thanks once again for the answers. Having looked at a disassembly I remember that *DOS was the command to run my floppy disk "GAZDOS" from EPROM at 0xe000 (?). This is one of the source codes I would like to rescue. I suspect however that the code was actually on one of the 8" floppies whic...
by acory
Mon Oct 31, 2016 11:38 pm
Forum: acorn atom and system
Topic: ATOM FPGA
Replies: 446
Views: 50231

Re: ATOM FPGA

I have continued to modify Hoglets VHDL code top add support for cassette tape. I have also modified the keyboard code so that the characters match the PC keyboard, as I was getting fed up of having to remember where the equivalent Atom key was :) . I had a strange problem with the cassette VHDL cod...
by acory
Fri Oct 21, 2016 12:01 am
Forum: acorn atom and system
Topic: ATOM FPGA
Replies: 446
Views: 50231

Re: ATOM FPGA

Hi Dave, sorry I wasn't clear. I don't have a genuine Godel, but I was going to use the Papilio with the Godil software. Of course I would need 5V/3.3V buffers, so more wiring. Enough to put me off ... for the time being. Anyway, small steps, but I have added code to generate a 2.4kHz signal on the ...
by acory
Tue Oct 18, 2016 10:58 pm
Forum: acorn atom and system
Topic: ATOM FPGA
Replies: 446
Views: 50231

Re: ATOM FPGA

Hi Dave, the changes you made worked a treat. The source code now compiles with no timing errors and the screen display is working correctly. There is something going on with SDDOS, and I do have an SD card connected left from my previous experimentation some months ago, when it was working. No matt...
by acory
Tue Oct 18, 2016 10:26 pm
Forum: acorn atom and system
Topic: Mini ATOM in HX8K breakout board FPGA
Replies: 31
Views: 4667

Re: Mini ATOM in HX8K breakout board FPGA

OK Dave, thanks again. I will give this another go. I am using Xilinx ISE, and it did flag a syntax error, so not sure what to make of this. Perhaps it compiles OK with the Altera software?

--Gary
by acory
Tue Oct 18, 2016 10:23 pm
Forum: acorn atom and system
Topic: ATOM FPGA
Replies: 446
Views: 50231

Re: ATOM FPGA

Thanks Dave/Hoglet (which do you prefer?), name here is Gary. Nice to have met you and spoken to you at the Cambridge meet. If I still lived in Bristol I would have been happy to buy you a drink for the great FPGA work you have being doing! Thanks for looking into this for me, I will download the ne...
by acory
Sun Oct 16, 2016 12:31 am
Forum: acorn atom and system
Topic: ATOM FPGA
Replies: 446
Views: 50231

Re: ATOM FPGA

For nostalgias sake I want to read some of my old Atom tapes which contain my own source code. I no longer have an Atom. I kept it for many many years. It was well kitted out with 32k expansion and the colour board (not that it ever gave great colours!). I don't even recall getting rid of it, and I ...
by acory
Sun Oct 16, 2016 12:21 am
Forum: acorn atom and system
Topic: Mini ATOM in HX8K breakout board FPGA
Replies: 31
Views: 4667

Re: Mini ATOM in HX8K breakout board FPGA

Yep, saw the Python, but runnng them just gives errors. My Python knowledge is virtually zero, so although I attempted to fix, they still don't run. I do note that I have Python 2.7 installed and it looks like these need Python3, but I have no idea how to make these co-exist on a Windows machine, an...
by acory
Sat Oct 15, 2016 3:03 pm
Forum: acorn atom and system
Topic: Mini ATOM in HX8K breakout board FPGA
Replies: 31
Views: 4667

Re: Mini ATOM in HX8K breakout board FPGA

I downloaded you code from Github. The intended target is a Papilio One (Spartan 3E). There seem to be some missing files... `include "BASIC_ROM.v" `include "MOS_ROM.v" `include "ram_areas.v" I might be able to figure it out, but I wonder if you might release these too? It looks like your design req...
by acory
Tue Mar 24, 2015 11:48 pm
Forum: acorn atom and system
Topic: ATOM FPGA
Replies: 446
Views: 50231

Re: ATOM FPGA

OK Dave, thanks once again for the advice. I am sorry to disappoint but my tape collection is almost all personal stuff. I used the Atom for programming (such as the space invaders I never finished) usually in assembler. I have never really played games because I suck at them big time. I was at univ...
by acory
Mon Mar 23, 2015 12:07 am
Forum: acorn atom and system
Topic: ATOM FPGA
Replies: 446
Views: 50231

Re: ATOM FPGA

Thanks once again Dave/Hoglet, I ordered a SD card socket and hooked up the 6 necessary wires, then I found the disk image file and some software to copy the image to a SD card. -> It worked first time! Does the FPGA read and write tapes if you add the necessary analogue interface electronics? --Acory
by acory
Thu Mar 12, 2015 12:22 am
Forum: acorn atom and system
Topic: ATOM FPGA
Replies: 446
Views: 50231

Re: ATOM FPGA

OK. I have found a SD card socket and 512Mb card (currently formatted in FAT format). It is all connected up. I do see the message "SD FORMAT? ERROR 246" on the screen. I have searched the forum to see if I can find out what to put on the card, but without success. I am working my way through the va...
by acory
Mon Mar 09, 2015 11:02 pm
Forum: acorn atom and system
Topic: ATOM FPGA
Replies: 446
Views: 50231

Re: ATOM FPGA

Hi hoglet, thanks for the information. I am now able to get into Atom BASIC. Next I need to find a SD card socket. I see that your location is Bristol. I only moved to Cambridge the middle of last year, until then I had lived 25+ years in Clifton. I am sure in the summer I will really miss going up ...
by acory
Mon Mar 09, 2015 10:55 pm
Forum: introduce yourself
Topic: Hi from Cambridge
Replies: 15
Views: 1789

Re: Hi from Cambridge

Many thanks for the kind greetings. I recently moved. Tonight I searched through various boxes of books and found my copy of Atomic Theory and Practice, including schematic with solder burn marks. I see that various documents are copyrighted 1980, so my memory of 1979 is wrong. I did have a Science ...
by acory
Thu Mar 05, 2015 12:13 am
Forum: acorn atom and system
Topic: ATOM FPGA
Replies: 446
Views: 50231

Re: ATOM FPGA

New joiner here. I found this forum when searching for FPGAs and Acorn Atom. I recently bought a Papilio One-500 and MegaArcadeWing for experimentation. I read about the replacement video controller for the Atom in an FPGA, and got to thinking that perhaps I could put the whole Atom into a FPGA... u...
by acory
Wed Mar 04, 2015 11:52 pm
Forum: introduce yourself
Topic: Hi from Cambridge
Replies: 15
Views: 1789

Hi from Cambridge

New joiner here. I am interested in the Acorn Atom forum and the work to emulate it on a FPGA. I ordered an Atom around spring 1979. There was a waiting list. I received it around summer of 1979 just before I went to university. Interestingly when I read about the Atom the various wikipedias it says...