Search found 15 matches
- Sat Apr 27, 2019 4:34 pm
- Forum: Development
- Topic: How to Build a keystick port internally to zx81
- Replies: 5
- Views: 2985
Re: How to Build a keystick port internally to zx81
I should have noted, that this used no commercial joystick, but microswitches connected to the lines for the cursor keys.
- Sat Apr 27, 2019 4:28 pm
- Forum: Development
- Topic: Using sll with z80asm Version 1.8
- Replies: 6
- Views: 9011
Re: Using sll with z80asm Version 1.8
Thanks for trying it out. I wasn't aware that this is no official Zilog instruction. It seems that I have to consider another assembler then or stick to the mundane, something like
Code: Select all
SLA A
OR 1
- Sat Apr 27, 2019 4:14 pm
- Forum: ZX BASIC
- Topic: Is there a ZX80 BASIC ROM for the ZX Spectrum 48k?
- Replies: 2
- Views: 3485
Is there a ZX80 BASIC ROM for the ZX Spectrum 48k?
Is there a ROM which enables the Spectrum to run ZX80 BASIC programs, whether it be an interpreter or a compiler? I'm searching for something like this https://www.sinclairzxworld.com/viewtopic.php?f=5&t=465 , but the other way round. Especially I'm hoping that this might enhance the speed, of progr...
- Fri Apr 26, 2019 8:25 pm
- Forum: Development
- Topic: How to Build a keystick port internally to zx81
- Replies: 5
- Views: 2985
Re: How to Build a keystick port internally to zx81
I once had such a thing with at least 1 meter of cable and a connector on the 81. I may have been quite naive, but it worked.
- Fri Apr 26, 2019 7:58 pm
- Forum: Development
- Topic: Using sll with z80asm Version 1.8
- Replies: 6
- Views: 9011
Using sll with z80asm Version 1.8
I want to use one of the shift left logical directives. According to the headline here http://z80-heaven.wikidot.com/instructions-set:sll they can either be written SLL or SL1. However the table shows sla directives, which do work as expected. But I have no success with using SLL instead.. The progr...