Search found 174 matches
- Thu Dec 06, 2018 7:38 pm
- Forum: Development
- Topic: New to Machine code, help required
- Replies: 17
- Views: 9547
Re: New to Machine code, help required
Hi Panther, where does the 726 value come from? The standard screen is 22 lines x 32 columns so 704 positions. Also, if you press the CONT key, your first routine will print another screen of characters... Thats because the JR NZ tests the value of the A Register, you are decrementing BC. So, the ro...
- Mon Jul 02, 2018 11:56 am
- Forum: Development
- Topic: ZX81 ULA-in-a-CPLD
- Replies: 238
- Views: 129527
Re: ZX81 ULA-in-a-CPLD
Thanks Andy,
have subscribed to new topic.
Dave
have subscribed to new topic.
Dave
- Mon Jul 02, 2018 11:38 am
- Forum: Development
- Topic: ZX81 ULA-in-a-CPLD
- Replies: 238
- Views: 129527
Re: ZX81 ULA-in-a-CPLD
Hi Andy,
i have same question as Martin. I'd like to order/buy two.
Dave
i have same question as Martin. I'd like to order/buy two.
Dave
- Tue Jun 05, 2018 11:13 am
- Forum: Development
- Topic: ZX81 ULA-in-a-CPLD
- Replies: 238
- Views: 129527
Re: ZX81 ULA-in-a-CPLD
Everyone wants to buy one/some. Make a big batch please.
- Wed Jan 31, 2018 6:44 pm
- Forum: Hardware
- Topic: zx spectrum in zx81 case
- Replies: 63
- Views: 42041
Re: zx spectrum in zx81 case
Very, very nice
- Sat Jan 20, 2018 7:33 pm
- Forum: Hardware
- Topic: zx spectrum in zx81 case
- Replies: 63
- Views: 42041
Re: zx spectrum in zx81 case
A bit more info on my build. Dont buy the IC "packs" from ebay. I got some new CPLDs from elsewhere the first out the packet programmed immediately. Then the Eprom wasnt recognised in either of my programmers. Another eprom programmed fine. Next the test - lots of coloured squares and the Z80 gettin...
- Sat Jan 06, 2018 4:27 pm
- Forum: Hardware
- Topic: zx spectrum in zx81 case
- Replies: 63
- Views: 42041
Re: zx spectrum in zx81 case
Hi Claudius, The CPLD programming failed, below is the log file. Can you say if its the file, the programmer or the board that is the problem/ Info (209060): Started Programmer operation at Sat Jan 06 15:20:41 2018 Info (209006): Unrecognized device Error (209001): JTAG ID code specified in JEDEC ST...
- Thu Jan 04, 2018 8:16 pm
- Forum: Hardware
- Topic: zx spectrum in zx81 case
- Replies: 63
- Views: 42041
Re: zx spectrum in zx81 case
Hi, the Quartus software hadnt installed correctly. Probably my fault. But the links above sorted it out. I've now got to the point where Im ready to try burning the CPLD.... Once I solder on the CLPD socket which just arrived today. Will report back on progress when i get it done, probably at the w...
- Wed Jan 03, 2018 10:10 pm
- Forum: Hardware
- Topic: zx spectrum in zx81 case
- Replies: 63
- Views: 42041
Re: zx spectrum in zx81 case
The Library was downloaded, but the exe doesnt seem to be although I think I used the download manager on the page. How do I install the Library? Does the exe pick it up when installing? I dont know if i'll get much more done tonight as Im up at stupid oclock in the morning for work and need to get ...
- Wed Jan 03, 2018 9:56 pm
- Forum: Hardware
- Topic: zx spectrum in zx81 case
- Replies: 63
- Views: 42041
Re: zx spectrum in zx81 case
Cheers Claudius I got as far as the drivers. Theres nothing in the Quertus folder other than a Common folder. Have I installed the wrong package? There is a folder at the same level called: modelsim_ase and drivers folder inside that. Im installing Flex IT 9 ? drivers just now from C:\altera\13.0sp1...