Sinclair ZX80 / ZX81 Forums

https://www.tandfonline.com/action/doSearch?AllField=zx81 Most of these are "Locked", so you can only read the abstracts, which gives you the idea. You can pay to get access if you want. A few are "Open Access", like the Quicksilva article I posted yesterday. Here's another one https://www.tandfonli...

Hope this hasn't been posted before, the article was uploaded in 2016, so it's pretty new.

https://www.tandfonline.com/doi/full/10 ... 16.1190441

First hand account of working for Quicksilva. Lots of interesting information. Nice downloadable PDF available.

Regards;

Greg

Using the ROMs find line address routine at 09D8 LINE-ADDR. may work better. or not, for your REM loop. For a given BASIC line number this subroutine will return the starting address of the actual line or the starting address of the following line if it does not exist (C reset). 09D8 LINE-ADDR PUSH ...

This line...
10 LET X=16623

Produces a false error message!

This line...

10 LET X=Val "16623"

Avoids the error message.

I've seen this bug before with other values as well, weird huh.

See the attached.

Regards;

Greg

Before you type anything in check out the "Type Fantastic" web site.

www.users.globalnet.co.uk/~jg27paw4/typ ... pehome.htm

Regards;

Greg

High Rise Hive is a HogRogProg game. See HogRogProg Collection in the games forum for more great games by them. I really like Bug Burst myself.

Regards;

Greg

I've updated the program with line... 9997 IF PEEK 49151>MAX THEN POKE 49151,0 Also the HogRogProg and Benham Disk programs. This should work as long as the VARS have been initialized before saving. BTW, what value do you get when you PEEK 49151? I guess the T/S1000 and ZX81 aren't 100% compatible! ...

As noted elsewhere, the videos I posted where created on a REAL, repeat, REAL TS/1000 with ZXPand+ interface. I've not come across the problem so I didn't know there was one. Adding a POKE 49151,0 to the start-up would negate the reason its there. It's there so that if say you pick item 46 from a lo...

The program uses memory location 49151 to keep track of the last item selected from the list. It checks this location on start up and moves the pointer to that item in the list. For some reason your system at start up has a high value stored there so your getting a subscript out of range error. I'll...

More sample projects...

HogRogProg collection

viewtopic.php?f=4&t=2867&p=30734&hilit= ... rog#p30734

Benhams Tops/Disks

viewtopic.php?f=11&t=1705&p=17620&hilit=benham#p17620

Regards;

Greg