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EPROM Emulator max size?

2

Hi, I just stumbled upon your eprom emulator project. It looks like at the moment the max size is 64KB (27C512). I have a project that needs 512KB (27C040). I...

muramasatheninja

added debugger version of Z80 code

1

This is a version of the Z80 code that has the core configured as a kind of debugger in the style of the Fluke 9100A. It allows you to read/dump...

calphool

Wheelwriter project, errors synthesizing

2

I get an error trying to synthesize mclwr1.v in Diamond 3.6 or 3.12: documents/impl1/source/mclwr1.v(120): net rx_fifo_wr is constantly driven from multiple places at instance RX_FIFO, on port WrEn. VDB-1000 Done:...

johnwiggins

MCL64 in cartridge form?

1

I'm mostly interested in the SuperCPU potential of the MCL64. Today I just found out about the [RAD cartridge project](https://github.com/frntc/RAD): puts a Raspberry Pi 3A/3B or Zero 2 on-board a...

Barkfin

ZEXALL on a Z80 machine - CRC errors

19

I used the zexall from: https://github.com/anotherlin/z80emu/blob/master/testfiles/zexall.z80! To do so, I tweaked the firmware so it can run on my SHARP MZ-80 K this way: 1. Mode 3 for RAM to...

hlide

MCLZ8 - Faulty IR with DDCBnn46 (BIT 0, (IX+nn))

1

nn shall not be a fetched opcode (no /M1 = 0 and R shall not increase). 

hlide

Internal_RAM fixed to 256K for MCL86+?

5

Hi Ted, Great work on all of these projects. With the Teensy having 1024KB of RAM (albeit only 512KB tightly coupled) and with relatively mild RAM usage in the main...

HeathenUK

Chip orientation? Black Screen.

10

I've soldered up one of these MCL64 boards, and am getting a black screen on power up on a 64. I programmed the Teensy successfully, and am certain there are...

COREi64

MCLZ8 issue with halt?

12

Thanks for the great MCZL8 solution! I am having a lot of fun using it with my MSX. It looks like the HALT instruction is not working as it should....

lintweaker

MCLZ8 - Some opcodes should take 5 cycles (for instance, DJNZ) and not only 4 cycles in M-cycle M1

3

https://github.com/MicroCoreLabs/Projects/blob/ea66a81165a3f88b8d14fafd05a566c4d131c5ae/MCLZ8/Code/Standard_Z80/MCLZ8.ino#L847 The memory access to the byte for displacement jump (or not) is taken one T-state **too early** compared to a genuine Z80. For Z80 machines which are very sensitive...

hlide