ZX81 Programming Problems

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jetsetmike
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ZX81 Programming Problems

Post by jetsetmike » Thu Dec 27, 2018 2:29 am

I am using EightyOne V1.12 emulator on my PC for playing ZX81 .P files and thought I would try some programming. I hit a snag immediately with trying to enter the commands as I could not work out the PC keys to use for switching to the various ZX81 keyboard.

I would appreciate it if some kind person could explain the PC keys I need to use to achieve whats needed

Thanks

Mike
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PeterJ
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Re: ZX81 Programming Problems

Post by PeterJ » Thu Dec 27, 2018 6:49 am

Can you give us a bit more details as to the program you are trying to enter and the problems you are experiencing when using the PC keyboard.

Image

https://sebastien.andrivet.com/en/posts ... lair-zx81/

It takes a while to get used to the keywords entry system, but reading the zx81 manual will help
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jetsetmike
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Re: ZX81 Programming Problems

Post by jetsetmike » Thu Dec 27, 2018 5:24 pm

Using the PC keyboard I can't find the key combination to get the white commands ABOVE each ZX81 key. I can achieve printing all the other values on each of the keys just not the ABOVE value.
I will have another look at the manual
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PeterJ
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Re: ZX81 Programming Problems

Post by PeterJ » Thu Dec 27, 2018 5:36 pm

Hi,

If you reset the ZX81, then the first key you press will give you the command in white. For example 'P' will give you 'Print'

This will get you started:

http://zxnext.narod.ru/manuals/ZX81_Manual.pdf
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jetsetmike
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Re: ZX81 Programming Problems

Post by jetsetmike » Thu Dec 27, 2018 5:47 pm

Thanks very much for the info and now after reading the first few pages of the manual I am up and running.
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1024MAK
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Re: ZX81 Programming Problems

Post by 1024MAK » Thu Dec 27, 2018 7:09 pm

You only get the command words when the ZX81 is expecting a command, hence the cursor is a ‘K’ (meaning command).
When the cursor is ‘L’ it is in letter mode. After pressing and holding SHIFT and then pressing return (FUNCTION/NEW LINE) the cursor will change to ‘F’ so you can enter a function.

Mark
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jetsetmike
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Re: ZX81 Programming Problems

Post by jetsetmike » Fri Dec 28, 2018 12:35 am

Thank you Mark for the info. Every little helps !!!
Mike
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