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https://sinclair.wiki.zxnet.co.uk/wiki/Z80#Differences_between_NMOS_and_CMOS_Z80s says:
> LD A,I and LD A,R bug
> The NMOS Z80s suffer a problem whereby LD A,I and LD A,R record the state of IFF2 af…
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In the attached ROM, the screen is scrolled horizontally in screen 8
The plotting involves that, for one column of pixels out of 16, the z80 and the VDP copy engine work on the same column.
On real…
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I've been experimenting with the Z80 instruction exerciser at http://www.mdfsnet.f9.co.uk/Software/Z80/Exerciser/ I've attached a zipped Acorn CP/M .dsd image for use with b-em containing the two .com…
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Appears to be caused by the Z80 getting stuck in the busy loop (check with bp d007,1,r)
Attached .inp file, wav recordings of said .inp being played with the LLE and also ValleyBell's HLE.
[sfex…
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**Describe the bug**
CALL opcodes create extra references in the stack pointing to called functions.
**To Reproduce**
Steps to reproduce the behavior:
1. Load the attached call_fffc.bin file a…
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```
Thrown:
TypeError: Cannot read property 'toString' of undefined
at o (/home/spaceboyross/z80vm/node_modules/z80js/index.js:1:1318)
at hex8 (/home/spaceboyross/z80vm/node_modules/z80js/…
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Some of the flags behavior tested by Z80_XCF_Flavor is incorrect, incomplete, or redundant. It is quite possible that the reported results are bogus.
More specifically:
* The behavior as it docu…
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Is it possible to have the init script also set up the memory banks for Z80 RAM, 68K RAM, hardware mem-mapped ports etc? Based on the memory map here:
https://www.chibiakumas.com/68000/genesis.php
…
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Hello, I am looking for an SBC that can be easily programmed from a host system and interface with that host system via a serial connection. This should not require any mechanic interaction (i.e. no p…
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I feel Appendix C needs updating as most of the links are broken.
Here are my findings and suggestions:
YAZE is now at https://www.mathematik.uni-ulm.de/users/ag/yaze-ag/
https://worldofspect…