Sinclair ZX80 / ZX81 / Z88 Forums

That's right the +5vdc and ground are there. You provided the PCB pad layout in the other posting that showed the I/O.

viewtopic.php?f=6&t=1203

Schematics look good too.

Thanks for the great work Sir Morris!

Thanks Rich! I'll look through them all tonight. Nice Hires programs.

Hopefully they have the MEM and MAXDEMO programs too.

Tim

I mailed TS1000 unit 1 (with unsoldered ZXULA-2) and Z80 to Andy tonight.

Please let me know your findings and if it can be used or if a ZXVid needs to be used like my working TS1000 unit 2 (with ZXVid).

Thanks,

Tim

I received my ZXpand and ZXpand-AY card last week and I have a few questions on where to get P files at. I have a few I found online but I would like to get the MAXDEMO, MEM, REVENGE, etc. as seen in the ZXpand youtube video. I also have an Atari style joystick and I found the CMDR SP2 program and r...

Is there a chance of getting schematics to the ZXpand and ZXpand-AY? To use the I/O ports I'll need to at least access to ground and +5vdc would be nice too. I found the older MrX-Soundcard manual and in the back was guidelines about the I/O. It looks like I was correct or pretty close to what was n...

From what I have been able to tell from the ZON-X81 manual and the Yamaha YM2149 datasheet to control the two 8 bit I/O data ports all I need to do is the following: 1. Set R7 (register 7) control first for noise and tone being off and either port B or A as output or input. Output B & Output A = FFh...

Yes. I received the email and will send the items to Andy.

Thanks,

Tim

Rich, I would like to send you my TS1000 unit 1 (with unsoldered ZX-ULA2 and upgraded Z80). Hopefully Andy can figure out why it was having problems with the ZXpand and ZXpand-AY and come up with a workable solution. Worst case he can solder in a ZXVid and send it back if he can't figure out a solut...

I have spent my weekend trying to troubleshoot using the ULA-2 with a ZXpand and a ZXpand-AY together in a TS1000. I shouldn't have to do all of this but at first was interested in a simple fix but have many hours of testing I have come to the conclusion that my TS1000 unit 2 (no ULA-2) with ZXvid c...

The stock TS1000 power supply says 9.75VDC @ 650mA and I read 12.7vdc on it. I read 10.6 vdc in and 4.96 vdc out at the 7805 initial before I had the ZXpand-AY and ULA-2. After connecting everything up I read no voltage drop or very small. I purchased from Radio Shack a 3/4.5/6/7.5/9/12 VDC @ 1 Amp ...