Lambda 8300/Zx81 differences and similarities

[Crayon21]

also, how do I access color commands for the chroma add on (EightyOne)

[1024MAK]

The documentation for the Chroma interface is here.
There are no extra BASIC commands.

Some of the Chroma interface functionality is via Z80 CPU IN or OUT instructions (I/O ports). There are no BASIC equivalents, so this has to be done in machine code.

As far as the colour display system is concerned, once a colour mode has been enabled via an OUT, most of the work is done by poking values into memory locations. Either via the BASIC POKE command or by a machine code program.

Mark

[mrtinb]

I don't know if anyone have ever used a Chroma interface for the Lambda 8300.

Lambda 8300 had it's own color interface: Lambda Colour Pack.

The Lambda Colour Pack was supported with an upgraded ROM with new commands: INK, PAPER and BORDER.

[Paul]

Some of the Chroma interface functionality is via Z80 CPU IN or OUT instructions (I/O ports). There are no BASIC equivalents, so this has to be done in machine code.
Mark

Or with the help of the Power Basic made by Swatosch.
Kind regards Paul

[mrtinb]

Power Basic by Matthias Swatosch

[Crayon21]

The documentation for the Chroma interface is here.
There are no extra BASIC commands.

Some of the Chroma interface functionality is via Z80 CPU IN or OUT instructions (I/O ports). There are no BASIC equivalents, so this has to be done in machine code.

As far as the colour display system is concerned, once a colour mode has been enabled via an OUT, most of the work is done by poking values into memory locations. Either via the BASIC POKE command or by a machine code program.

Mark

I can't be expected to poke in values that I won't be able to remember. Please tell me someone made an aid for it. or a mini assembler

[mrtinb]

Everything you need to know about the Chroma interface is here:

http://www.fruitcake.plus.com/Sinclair/ ... tation.htm
and
http://www.fruitcake.plus.com/Sinclair/ ... lities.htm

[Crayon21]

the zx81 had HexLd, is there a similar program to aid in machine language programming for the lambda?

B&W is fine with me, i just wish that it didn't flicker so much in EightyOne

[mrtinb]

Flickering in EightyOne is adjusted with the tv controls. Find it in the menus.

[mrtinb]

I have a Danish book with machine language for both ZX81 and Lambda 8300.

Below you can see one page from the book.

In the book the first examples are just saved at address 30000, and cannot be saved. Later in the book it is advised to create a REM statement in line 1, with space for your program. Just make plenty of X'es, so your machine language program will fit.

Code: Select all

1 REM XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Then change 30000 in line 10 to:

Code: Select all

10 LET X=17307