Search found 151 matches

by BarryN
Wed Aug 18, 2021 3:55 pm
Forum: Emulators
Topic: EO v2.0 - planning stage
Replies: 36
Views: 16408

Re: EO v2.0 - planning stage

mrtinb wrote: Wed Aug 18, 2021 9:47 am Looking forward to a native Mac app. Please make sure it works with Apple Silicon M1. :-)
I know it's not as nice as EightyOne, but there is 64 bit SZ81, which should run on the Apple M1, though I don't have an M1 to test with.
by BarryN
Tue Aug 17, 2021 7:17 pm
Forum: Hardware
Topic: Why is the RAM Pack so terrible?
Replies: 5
Views: 1329

Re: Why is the RAM Pack so terrible?

And I'm not talking about the wobble. I've got a stock Sinclair ZX 16k RAM Pack, and right off the bat I had to replace two of the 4116s because they were clearly bad (found out with a logic analyzer, wouldn't start otherwise). But now I accidentally left the ZX81 on over night, and when I came bac...
by BarryN
Mon Aug 16, 2021 2:54 am
Forum: Welcome Area
Topic: Hello from Nashville, Tennessee USA!
Replies: 24
Views: 6672

Re: Hello from Nashville, Tennessee USA!

mrtinb wrote: Sun Aug 15, 2021 5:18 pm
DrVenkman wrote: Sat Jul 31, 2021 8:41 pm Now can someone point me to a reputable seller where I can buy a TZXduino or even a kit? I would quite enjoy building one.
It seems they come quite cheap preassembled on eBay.
I like my ZXPand Plus. :)
by BarryN
Wed Aug 11, 2021 2:03 am
Forum: ZX BASIC
Topic: How do i get a movement on screen using the ZX81
Replies: 26
Views: 7920

Re: How do i get a movement on screen using the ZX80

Crayon21 wrote: Wed Aug 11, 2021 12:11 am can it be done with graphics?
Sure, just print the graphics characters. Don't expect hi-res though from BASIC.
by BarryN
Tue Aug 10, 2021 6:45 pm
Forum: Hardware
Topic: VLa81 noisy video signal
Replies: 19
Views: 4141

Re: VLa81 noisy video signal

Hi, so, last year I solve to fix a TS1000, my first computer, broken 35 years ago by my girlfriend. As the RF sintonizer doesn´t finded any video signal from the computer I made a video mod (the one with NPN transistor, 100 Ohm resistor and 100uF decoupler capacitor). The computer didn´t give any v...
by BarryN
Mon Aug 09, 2021 12:09 pm
Forum: ZX BASIC
Topic: How do i get a movement on screen using the ZX81
Replies: 26
Views: 7920

Re: How do i get a movement on screen using the ZX80

You can do it in BASIC using text.

Code: Select all

10 FOR Y=1 TO 10
20 FOR X=1 TO 10
20 PRINT AT Y,X;" HELLO "
30 NEXT X
40 FOR X=10 TO 1 STEP -1
50 PRINT AT Y,X;" HELLO "
60 NEXT X
70 PRINT AT Y,1;"       "
80 NEXT Y
The word hello will go back and forth and advance down the screen.
by BarryN
Sun Aug 08, 2021 12:53 pm
Forum: Hardware
Topic: Took Apart My TS1000 - I Have Questions
Replies: 12
Views: 2668

Re: Took Apart My TS1000 - I Have Questions

It’s interesting that your TS1000 has a 2C184E in it. That blows out the idea that these were all fitted with the 2C210E ULAs, and hence they all have video outputs that include the ‘back porch’. Mark My TS1000 came with a 2C184E ULA. I had video issues with it back in the day, dark screen on my TV...
by BarryN
Sun Aug 08, 2021 4:18 am
Forum: Hardware
Topic: Took Apart My TS1000 - I Have Questions
Replies: 12
Views: 2668

Re: Took Apart My TS1000 - I Have Questions

Which ULA does it have? The same as in my ZX81, the 2C184E. This on was made in the 10th week of '82 per the date code (that one was made in the 26th week of '82). I swapped ULAs to see if the RF would improve but sadly, it didn't. So I've already removed and gutted the RF can and have one of your ...
by BarryN
Thu Aug 05, 2021 12:46 am
Forum: Hardware
Topic: Video conditioning mod issues
Replies: 6
Views: 1686

Re: Video conditioning mod issues

If you upgrade the ULA to version 210E or one of the modern replacements you should get good video. I use a legacy 210E ULA and run the original RF modulator and I've never had video issues.
by BarryN
Tue Aug 03, 2021 1:25 pm
Forum: Software
Topic: Memory check utility
Replies: 5
Views: 7976

Re: Memory check utility

siggi wrote: Tue Aug 03, 2021 9:06 am Olli also wrote a SYSINFO program to check for ram/rom, M1!-circuit (M/C above 32K) and ethernet chip:

https://forum.tlienhard.com/phpBB3/view ... 6150#p6150

Siggi
Nice, thanks for the link. Is the source code available? What was this written in/with? ZCC? Assembler?