Search found 16 matches

by sl07h1
Fri Jun 11, 2021 2:42 am
Forum: Development
Topic: ZX 81 development on Linux. What tools?
Replies: 11
Views: 1366

Re: ZX 81 development on Linux. What tools?

Hi, I'm a Linux user, I would like if there's a tool setup for do the following: 1. Write Assembler code (or BASIC code) in a reasonable way and export the code to an emulator to test. 2. Export stuff from the emulator to a .tgz file (or a .p file) in order to get the stuff working in the ZX 81 Tha...
by sl07h1
Fri Jun 11, 2021 2:29 am
Forum: Development
Topic: Let's talk about Hi-Res truth and myths, I'm angry.
Replies: 5
Views: 402

Let's talk about Hi-Res truth and myths, I'm angry.

OK, I'm a little angry. I was eager to do some hi res experiment on my ZX81 and all I hear is that you only can do it with no memory extension or with a modified one. I understand the concept of pseudo hi-res, you can map the char map to a place in the ROM where if you're lucky you can find some cha...
by sl07h1
Sun Mar 21, 2021 11:37 pm
Forum: Development
Topic: ZX 81 development on Linux. What tools?
Replies: 11
Views: 1366

Re: ZX 81 development on Linux. What tools?

Wow, I guess I didn't search properly...

Thank you guys!!!

:)
by sl07h1
Sun Mar 21, 2021 10:35 pm
Forum: Development
Topic: ZX 81 development on Linux. What tools?
Replies: 11
Views: 1366

ZX 81 development on Linux. What tools?

Hi, I'm a Linux user, I would like if there's a tool setup for do the following: 1. Write Assembler code (or BASIC code) in a reasonable way and export the code to an emulator to test. 2. Export stuff from the emulator to a .tgz file (or a .p file) in order to get the stuff working in the ZX 81 I'm ...
by sl07h1
Wed Mar 17, 2021 2:29 pm
Forum: Hardware
Topic: what ROM do I have?
Replies: 9
Views: 1397

Re: what ROM do I have?

I read the other post, it seems that I have the NEC ROM 622 (checksum 855106)

Thanks a lot!
by sl07h1
Wed Mar 17, 2021 2:07 pm
Forum: Hardware
Topic: what ROM do I have?
Replies: 9
Views: 1397

Re: what ROM do I have?

1024MAK wrote: Wed Mar 17, 2021 10:35 am
10 FAST
20 LET A = 0
30 FOR B = 0 TO 8191
40 LET A = A + PEEK B
50 NEXT B
55 PRINT “ROM TEST”
60 PRINT A
70 PRINT SQR 0.25

Note that it takes a while and while running, you will get a black screen.

Note the numbers it reports and report what it says.

Mark
ROM TEST
855106
0.5
by sl07h1
Wed Mar 17, 2021 3:17 am
Forum: Hardware
Topic: what ROM do I have?
Replies: 9
Views: 1397

what ROM do I have?

I learned that there are two ROMs, a first, buggy one and a newer (less older, :D ) debugged one. There's an easy way to know what ROM I have, a PEEK on an address or something?

If I have the buggy ROM, should I worry?

Thanks in advice!
by sl07h1
Wed Mar 17, 2021 3:11 am
Forum: Hardware
Topic: Strange behavior when loading programs
Replies: 2
Views: 517

Re: Strange behavior when loading programs

weird...
by sl07h1
Wed Mar 17, 2021 12:42 am
Forum: Hardware
Topic: Strange behavior when loading programs
Replies: 2
Views: 517

Strange behavior when loading programs

Hi guys, I have a ZX 81 with the MEMOPAK 32K., I noted that without the Memopak, when I press Break when I just type LOAD "" (without starting to load), I get the "D/0" error, which is OK, but when I do the same with the memopak plugged I don't get the error, but a space and the K, like I just wrote...
by sl07h1
Wed Mar 03, 2021 9:45 pm
Forum: Hardware
Topic: Changing the ZX81 ULA, newbie question
Replies: 8
Views: 974

Re: Changing the ZX81 ULA, newbie question

I was reading the posts about the heat sink, my gosh! It's really a controversial / sensitive subject in this forum :lol: