Search found 398 matches

by bola_dor
Sun May 02, 2021 1:42 am
Forum: ZX BASIC
Topic: Can't make anything fit into 1K... or is it me?
Replies: 31
Views: 11752

Re: Can't make anything fit into 1K... or is it me?

As said before. ZX81 uses most part of this 1K to keep the screen Display File.. luckily if you are running in less than 3K zeddy will use a compressed frame opening it from top left hand. so if you keep it to that corner you will have enough RAM to run it. 10 PRINT "PREMI %1 O %2" 30 IF INKEY$<>"1"...
by bola_dor
Sat May 01, 2021 6:33 pm
Forum: Hardware
Topic: Bad 12v line ISSUE 6A with only 5v RAM
Replies: 27
Views: 8268

Bad 12v line ISSUE 6A with only 5v RAM

Hi, I ve got this ISSUE 6A TIMEX/PORTUGAL from a CZ2000 (Argentinian rebranded) 20210501_130309.jpg This one has MCM 4517 low ram IC that only needs +5v being pin compatible with 4116 (this is not common here but not so rare either) Thing is that 12v line is down to about 1v and -5 to about -2v or l...
by bola_dor
Sat May 01, 2021 1:06 am
Forum: GAMES
Topic: WRX Space invaders
Replies: 8
Views: 3368

Re: WRX Space invaders

JohnsBargs wrote: Fri Apr 30, 2021 12:01 pm I wish the Retropie version of EightyOne supported 32KB :(
Does it support ZXPAND/+ ?
by bola_dor
Fri Apr 30, 2021 6:14 am
Forum: GAMES
Topic: WRX Space invaders
Replies: 8
Views: 3368

Re: WRX Space invaders

20210430_005856.jpg I did some Beta testing on this for the developer. Last version is really playable and I guess 99% accurate with the original. The "partial chroma" version is playable without a Chroma81 interfase with a wite background as we are used in ZX81. The full Chroma version shows the s...
by bola_dor
Mon Apr 19, 2021 3:51 am
Forum: Hardware
Topic: TS 1000 Composite Mod
Replies: 3
Views: 2037

Re: TS 1000 Composite Mod

Yes!! The MAK1024 buffer mod is much more better.. I had several troubles with the simple transistor/ resistor mod. In the meanwhile if the problem is the intensity try using a signal diode (the smaller glass ones 4148) on the transistor base, the lead coming from the ULA, with anode pointing to the...
by bola_dor
Sun Apr 11, 2021 4:01 pm
Forum: Hardware
Topic: ZXpand+ and Joystick...
Replies: 6
Views: 1733

Re: ZXpand+ and Joystick...

Thanks Mark !!
by bola_dor
Sun Apr 11, 2021 3:07 pm
Forum: Hardware
Topic: ZXpand+ and Joystick...
Replies: 6
Views: 1733

Re: ZXpand+ and Joystick...

The ZXpand replaces the ROM with it's own ROM. So the LOAD and SAVE commands are replaced with versions, where files are LOADed and SAVEd to the ZXpand's SD card. The COPY command to print a screenshot to the printer is totally removed, and replaced with CAT to display the content of SD card. And t...
by bola_dor
Sun Apr 11, 2021 1:33 pm
Forum: Hardware
Topic: ZXpand+ and Joystick...
Replies: 6
Views: 1733

Re: ZXpand+ and Joystick...

mrtinb wrote: Sun Apr 11, 2021 9:44 am I think if the game uses the ROM routines for keyboard read, then it'll work. If the game has it's own keyboard routine, then it won't work.
:?
Do you mean BASIC games? Perhaps compiled BASIC ones?
What about z88dk?

Tried Omega Phenix and didn't work.. :cry:
by bola_dor
Sat Apr 10, 2021 11:55 pm
Forum: Hardware
Topic: ZXpand+ and Joystick...
Replies: 6
Views: 1733

ZXpand+ and Joystick...

Hi I tried to configure the ZXpand+ joystick with no success... I've used the CONFIG "J=UDLRF" command and then load the games but it doesn't seem to work as I spect to.. It actually works if I test in BASIC for inkey$ but if I configure it to the keys spected by some game .. it just doesn't work.. ...
by bola_dor
Mon Apr 05, 2021 7:17 am
Forum: Hardware
Topic: ZX81 ROMs 3 types?
Replies: 57
Views: 20084

Re: ZX81 ROMs 3 types?

The TS1500 ROM is identical to ZX81 Version. The checksum of both my 1500's differ from this list: 854885 = 550 855106 = 622 878117 = 649 as they report it as being 854417! They do have Timex roms, not Sinclair. Look at the TS1500/bugs section https://en.m.wikipedia.org/wiki/Timex_Sinclair_1000 My ...