Sinclair ZX80 / ZX81 Forums

The switch will only affect software that reads it's position.

Sinclair's BASIC ROM reads the 50/60 position, to create the right picture.

But some software made in machine language might not read the position and hardcode/assume 50 or 60.

I see one major difference:

• TS1510 is with area 8k - 16k
• Chroma is with area 0k - 16k

Timex Sinclair released TS1510 expansion for TS1500, TS1000 and ZX81, to use ROM cartridges.

The Chrome interface has a cartridge port as well. This is compatible with the Spectrum ZX Interface 2.

Does anyone know if these cartridge interfaces are compatible?

The keyboard you link to would not help you with the wobble.

I did not have a ZX81 back in the day. The first project for my current ZX81 was to build an external keyboard.

There is a problem using the term old and new. What happens after that? The new new ROM? Old and new ROMs have been used to describe ZX80 ROM and ZX81 1st ROM. This was because the ZX80 could use original ROM or the new ZX81 ROM. You can see this in the book Mastering Machine Code on your ZX80/ZX81....

It’s not the CONFIG”V” that shows this.

It’s the V key after FUNCTION. Looking at the keyboard, V is the only key that has not assigned a function.

My ZXpand has It’s EightyOne that has 1.10.

Hmm. So SMB17 seens more like an easter egg.

But when I start I get the message: Is there two firmware version on the ZXpand, so this is ZXpand 1.10 & 1.7?

Hi :-) Just out of curiosity. The command Function-V outputs SMB17 I havn't seen this command documented anywhere. And now when we're talking about ZXpand commands: Wouldn't it be cool extend the ZXpand ROM, so you create custom commands in your own programs? E.g. ZXpand ROM would detect a pattern a...

Paul wrote: ↑

Fri Oct 26, 2018 10:22 am

I'm afraid ZX Team is mine. Just a test before I finally bought Eagle.
His must be ZX WORLD.

Sorry. Typing mistake.