Good point. Thanks. Didn't seem to matter in my case though.hlide wrote: ↑Sun Jun 07, 2020 5:31 pm nah, use something likeWhy? OR will affect C flag in the wrong way if you want to use it through SLL.Code: Select all
DB $CB,$37 ; SLL A
Search found 15 matches
- Wed Nov 18, 2020 3:42 pm
- Forum: Development
- Topic: Using sll with z80asm Version 1.8
- Replies: 6
- Views: 9245
Re: Using sll with z80asm Version 1.8
- Fri Jul 19, 2019 1:42 am
- Forum: ZX Spectrum Lounge
- Topic: X and Y
- Replies: 27
- Views: 22550
Re: X and Y
I simply make a screen copy with https://www.gimp.org/
- Fri Jul 19, 2019 1:38 am
- Forum: ZX Spectrum Lounge
- Topic: X and Y
- Replies: 27
- Views: 22550
Re: X and Y
what are all the numbers for? positions? kinda lost here Yes, the numbers are positions. Leaving alone the input lines, PRINT AT goes "the other way round" as PLOT in two ways. PLOT has a mathematical system where the horizontal position is counted left to right and is the first argument of PLOT. P...
- Thu Jul 18, 2019 11:47 pm
- Forum: Development
- Topic: Error which can not possibly exist in z80asm Version 1.8
- Replies: 8
- Views: 5170
Re: Error which can not possibly exist in z80asm Version 1.8
The issue has been resolved by word of God.
It seems that using an incorrect syntax for some IX commands like instead of you get this strange error messages about IY and SP.
Thanks to all who contributed to the discussion and the solution.
It seems that using an incorrect syntax for some IX commands like
Code: Select all
LD (IX),A
Code: Select all
LD (IX+0),A
Thanks to all who contributed to the discussion and the solution.
- Thu Jul 18, 2019 4:52 pm
- Forum: Development
- Topic: Error which can not possibly exist in z80asm Version 1.8
- Replies: 8
- Views: 5170
Re: Error which can not possibly exist in z80asm Version 1.8
Or it's an OCR issus… "0"="o"... "I"="1" or "L"... I typed everything in with my bare hands. That's how we oldtimers do things. https://www.memecenter.com/fun/2086225/old-timers Or it's the Spectrum ASCII page code, were any codes like "£" are at the wrong place in the IBM ASCII table. On the other...
- Wed Jul 17, 2019 4:46 pm
- Forum: Development
- Topic: Error which can not possibly exist in z80asm Version 1.8
- Replies: 8
- Views: 5170
Re: Error which can not possibly exist in z80asm Version 1.8
Sorry for my answer which will be useless with regard to your psedo … I fear, you are right. shift.zas:1386: error: unable to resolve reference: iy Nerver set a label : "A:","SP:", "HL:","BC" … in your code. The lower/hupper case may give a wrong label jump. I don't deny that this is good advice, B...
- Tue Jul 16, 2019 6:18 pm
- Forum: Development
- Topic: Error which can not possibly exist in z80asm Version 1.8
- Replies: 8
- Views: 5170
Error which can not possibly exist in z80asm Version 1.8
The error message tells me. shift.zas:1386: error: unable to resolve reference: iy As far as I understand this could happen e.g. with jrz r,iy because here the iy would be interpreted as a variable or a lable or so. The strange thing is, that a text search uncovers not one single iy in the source fi...
- Mon May 13, 2019 12:38 am
- Forum: Development
- Topic: old magazine article -- interesting ! ??
- Replies: 16
- Views: 9887
Re: old magazine article -- interesting ! ??
It seems building this unit is useless unless someone has the content of the EPROM Operation System Software sold from the magazine. I built such a thing, also using a 8255, because they where easier to program and cheap as sh*t compared to the fancy Z80PIO. EPROM-programming software is trivial. Y...
- Sun May 12, 2019 2:13 pm
- Forum: Development
- Topic: Using sll with z80asm Version 1.8
- Replies: 6
- Views: 9245
Re: Using sll with z80asm Version 1.8
There is lots of information on the Z80 and it’s instruction set on http://www.z80.info/ ;) Thanks. I also used http://clrhome.org/table/# but the mouse over fly out always goes to the right i.e. goes over the edge of my screen for the right most column. Also all jr and jp instructions have the sam...
- Tue Apr 30, 2019 12:09 pm
- Forum: ZX BASIC
- Topic: Is there a ZX80 BASIC ROM for the ZX Spectrum 48k?
- Replies: 2
- Views: 3552
Re: Is there a ZX80 BASIC ROM for ZX Spectrum 48k?
Thanks a lot for the link.
It seems that I'll have to try it on an emulator first.
It seems that I'll have to try it on an emulator first.