Search found 96 matches

by David G
Fri Apr 02, 2021 11:19 pm
Forum: Sinclair Misc
Topic: Who's on first? (your first Sinclair products)
Replies: 7
Views: 420

Re: Who's on first? (your first Sinclair products)

Here in USA, the ZX80 was the first Sinclair product I heard of. From the advertisements I realized a real computer could be obtained for $150 or so -- although I did not have $150 being a high school student. After running it though my mind for weeks i became convinced it was too limiting. So when ...
by David G
Fri Apr 02, 2021 12:02 am
Forum: Hardware
Topic: zx81 math question
Replies: 4
Views: 221

Re: zx81 math question

PRINT 20-2*3**2+4/2*3 This is a good brain-twister Using my 1970s learnt order-of-operators, it all works out fine but this new PEMDAS idea messed with my head. At first I thought it meant "perform the Multiplications first, then the Divisions", but that results in the wrong answer. After many effor...
by David G
Wed Mar 31, 2021 11:18 am
Forum: Emulators
Topic: Nocash/no$zx emulator - how to use INCLUDE file
Replies: 0
Views: 109

Nocash/no$zx emulator - how to use INCLUDE file

NO$ZX 2.0 emulator seems to be based on A22i assembler, which supports an include directive

Code: Select all

.INCLUDE TEST.INC
however it returns a FATAL error. Any ideas?

the include file has one line:

Code: Select all

ZX_U_ARROW EQU 70H
that works fine if it is typed into the ASM file directly
by David G
Wed Mar 24, 2021 1:13 pm
Forum: Software
Topic: Developing for Lambda 8300 with emulator and assembler: NO$ZX 2.0
Replies: 5
Views: 16888

Re: Developing for Lambda 8300 with emulator and assembler: NO$ZX 2.0

thanks. slowly i am getting to understand it. How can I load the other ROM you mentioned? here is my assembly language test app for Lambda 8300 works OK on NO$ZX v2.0 for Windows using setting "Lambda 8300 (ZX81 revision)" movedot_LAMBDA_2K_nozx.asm movedot_LAMBDA_2K_nozx.BIN.p movedot_LAMBDA_2k_zxi...
by David G
Wed Mar 10, 2021 7:38 am
Forum: Software
Topic: Developing for Lambda 8300 with emulator and assembler: NO$ZX 2.0
Replies: 5
Views: 16888

Re: Developing for Lambda 8300 with emulator and assembler: NO$ZX 2.0

NO$ZX works very differently than other emulators, it took me a while to figure it out. I used the setting "Lambda 8300 (ZX81 revision)" as the other one (after loading the BIN file) just put random characters on the screen The 8300 seems OK but it requires a lot more typing like spell out L-O-A-D i...
by David G
Tue Mar 09, 2021 12:44 am
Forum: Sinclair Misc
Topic: VIDEO: Most Influential Machine Ever?
Replies: 1
Views: 301

VIDEO: Most Influential Machine Ever?

I saw this new video on YouTube VIDEO: Is This Happy Birthday To The Most Influential Machine Ever? My initial reactions: * Is it about the Apple II? * one of the best videos ever about the ZX81! * perhaps not that influential to the USA market (where low-price wasn't king) * it makes the case for t...
by David G
Tue Feb 23, 2021 8:11 pm
Forum: Hardware
Topic: Blue Drive by Victor Trucco
Replies: 2
Views: 859

Re: Blue Drive by Victor Trucco

https://www.google.com/search?q=site%3Avictortrucco.com+blue+drive Blue Drive 2 for TK85 and other ZX81 compatible - Fast pendrive loading - 512kb memory expansion - Real time clock maintained with battery Pendrive refers to a USB memory device BlueDrive fast loading interface, which loads .P files ...
by David G
Tue Feb 23, 2021 9:48 am
Forum: Emulators
Topic: New release of EightyOne available
Replies: 190
Views: 106396

Re: New release of EightyOne available

Yes it is supported, I see now it was user error in my script. Very nice work on EightyOne
by David G
Tue Feb 23, 2021 8:57 am
Forum: GAMES
Topic: STEPS - New 16K ZX81 Game
Replies: 11
Views: 1034

Re: STEPS - New 16K ZX81 Game

Cheers to Bob, it looks right at home on the ZX81 screen

And cheers to the original designer Ahmed. As a game it is difficult, but I work at it a few minutes every week and have progressed a bit. I'm still not sure what each icon represents yet sure it will become more clear in time
by David G
Tue Feb 23, 2021 8:42 am
Forum: Software
Topic: [type-ins] "Ordi-5" french programs.
Replies: 4
Views: 797

Re: [type-ins] "Ordi-5" french programs.

Very nice. I examined the keyboard article "Change the meaning of the keys on your keyboard" -- it was very informative. I transcribed the original text of the article. Can it be added to the type-in files?