Search found 772 matches

by mrtinb
Wed Nov 14, 2018 9:57 am
Forum: Hardware
Topic: TS1000 ULA vs ZX81 ULA
Replies: 24
Views: 1066

Re: TS1000 ULA vs ZX81 ULA

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.
by mrtinb
Mon Nov 12, 2018 1:57 pm
Forum: Hardware
Topic: ROM cartridge
Replies: 3
Views: 120

Re: ROM cartridge

I see one major difference:
  • TS1510 is with area 8k - 16k
  • Chroma is with area 0k - 16k
by mrtinb
Sat Nov 10, 2018 8:55 pm
Forum: Hardware
Topic: ROM cartridge
Replies: 3
Views: 120

ROM cartridge

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?
by mrtinb
Wed Nov 07, 2018 5:26 am
Forum: Sinclair Misc
Topic: How bad was the wobble on the zx81
Replies: 13
Views: 294

Re: How bad was the wobble on the zx81

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.
by mrtinb
Mon Nov 05, 2018 10:13 pm
Forum: ZX BASIC
Topic: Difference between New rom and Old Rom
Replies: 5
Views: 127

Re: Difference between New rom and Old Rom

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....
by mrtinb
Wed Oct 31, 2018 8:58 pm
Forum: Sinclair Misc
Topic: ZXpand Function-V
Replies: 10
Views: 259

Re: ZXpand Function-V

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.
by mrtinb
Wed Oct 31, 2018 8:10 pm
Forum: Sinclair Misc
Topic: ZXpand Function-V
Replies: 10
Views: 259

Re: ZXpand Function-V

My ZXpand has

Code: Select all

ZXPAND+ 1.12 “MOGGY”

SMB17
It’s EightyOne that has 1.10.

Hmm. So SMB17 seens more like an easter egg.
by mrtinb
Wed Oct 31, 2018 4:10 pm
Forum: Sinclair Misc
Topic: ZXpand Function-V
Replies: 10
Views: 259

Re: ZXpand Function-V

But when I start I get the message:

Code: Select all

ZXPAND+ 1.10 "MOGGY"
Is there two firmware version on the ZXpand, so this is ZXpand 1.10 & 1.7?
by mrtinb
Tue Oct 30, 2018 10:44 pm
Forum: Sinclair Misc
Topic: ZXpand Function-V
Replies: 10
Views: 259

ZXpand Function-V

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...
by mrtinb
Fri Oct 26, 2018 10:30 am
Forum: Development
Topic: Bus Library
Replies: 8
Views: 479

Re: Bus Library

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.