DIY DOS2 cartridge: bootloops

By lintweaker

Master (192)

lintweaker's picture

26-01-2020, 18:19

I am trying to re-purpose one of my MSX cartridge PCBs as a DOS 2 cartridge.
So far I am only getting bootloops (as seen in another old thread, not solved).

I've recreated the required logic for the mapper in a EE PLD using the DIY DOS2 schematics from Grauw's site.
Do I need a specific DOS2 ROM version? Did a miss an (important) requirement?

My logic currently uses 6000h-63ffh for DOS2 page selection and puts the ROM in page 1 (4000-7fffh).

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By lintweaker

Master (192)

lintweaker's picture

27-01-2020, 18:00

Ah, silly me. Got it working, it helps to actually assign a pin to the mapper select signal in the PLD.
DOS2 works fine now (it even works with a Z180...)

By sd_snatcher

Prophet (3246)

sd_snatcher's picture

27-01-2020, 22:18

Tip: Nextor is a newer version of DOS2. You'll have much more fun with it. :)

By lintweaker

Master (192)

lintweaker's picture

28-01-2020, 18:29

sd_snatcher wrote:

Tip: Nextor is a newer version of DOS2. You'll have much more fun with it. :)

Yes I know :) I am using that as well but I "need" DOS2 for testing with my Z180 board. With Nextor I get a kernel error when using the Z180.

By erpirao

Paladin (1018)

erpirao's picture

09-02-2020, 22:08

What specifications would your project have?
Do you have any links to check it out?
z180 @ 14 + 9958? could be amazing