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How to do a MegaROM?

by thegeps on 05-09-2019, 20:24
Score: 325.65 %, Type: Forum topic , Comments: 41 comments
to create an MegaRom of 128kB that use an ASCII 16K Mapper #target rom #code Seg0,04000h,04000h db ... Hi all! I know how to do a ROM, but the space is about to end... So I need to do a MegaROM but I ... and stuff. A MegaROM is the same as a ROM, but you can change different parts of the ROM area by writing ...

publishers able to produce SCC chips and Rom mappers

by ARTRAG on 25-11-2019, 14:35
Score: 272.12 %, Type: Forum topic , Comments: 2 comments
Which are the active publishers able to produce games based of SCC megaroms? Which is using modern FPGA emulations and which original sound chips? Manuel Pazos at Manuel Pazos at msxcartridgeshop.com manufactures cartridges with scc in a fpga. thanks I will try to get in thanks I ...

CF-640 by 8bits4ever

by meckert on 10-07-2016, 21:52
Score: 115.4 %, Type: Forum topic , Comments: 24 comments
trouble using Loadrom to run megaroms with Nextor on the SD-512. But it works fine from a DOS/DOS2 floppy ... to run them. To run megaroms, you may need to find cracked disk versions that will work ... a configurable expansion means it can be in regular RAM mode or some mapper mode, which will remove slowdowns ...

ASCII 8 mapper does not work

by Metalion on 05-01-2020, 18:15
Score: 270.35 %, Type: Forum topic , Comments: 9 comments
is set on the slot where your megarom is (it is a common error to look at the wrong slot). The openmsx ... to add 11 empty pages (1 'nop' in each) to make a 'standard' size megarom. I ... no standard is written that says that a megarom HAS to have 2^n pages). Maybe I've got a old version ...

MSX1 pages and slots

by tokumaru on 03-09-2006, 17:58
Score: 159.5 %, Type: Forum topic , Comments: 62 comments
a copy of the 32KB ROM in #8000 For 32K it make sense, but if I do a megarom of 128K I canno For 32K it make sense, but if I do a megarom of 128K I cannot use any mirroring effect, as the address ... It can also happen with some megaroms with mirrors and with its segments all initialized to 0 ...

How to deal with roms > 32KB's < 64KB's outside the 0x4000..0xBFFF typical area (without using megarom mappers)

by friguron on 19-02-2020, 13:03
Score: 465.04 %, Type: Forum topic , Comments: 16 comments
file will be now 48 KB's. As of now I don't want to feel I need to use/create a megarom ... with megarom way of dealing with big rom files.   BTW, I'm using Grauw's assembler and apparently ... rom files/eeproms bigger than 32 KB's, and up to 64 KB's, without using a rom mapper ...

MSX2+ with 512k RAM, and ROMs without a flashcart

by ckrtech on 20-02-2020, 10:32
Score: 131.86 %, Type: Forum topic , Comments: 8 comments
probably does a better job on loading and running MegaROMs on MSX Memory Mapper. Try it! Also, ... 8k mapper? I don't mind missing the music vs the original cartridge if I can get the extra ... it does so using what I guess was the Konami 8k mapper?" is very difficult to patch a Konami 8k ...

Nemesis 3 Basic Loader for extracted .bin files

by alessandro_scaccia on 25-04-2019, 09:42
Score: 135.3 %, Type: Forum topic , Comments: 2 comments
of MegaROMs use this to fill a memory mapper with the ROM's data, by doing BLOAD,R a number of times. ... the MegaROM's contents in the memory mapper. But then you still need some machine code to start it. So last ... Hi at all, I extracted the Megarom Nemesis3 through the romsplit tool in blocks of 16kb ...

How do I open .ROM and .DSK games using MSX DOS 1?

by bestiarum on 06-08-2019, 04:14
Score: 130.3 %, Type: Forum topic , Comments: 12 comments
other megaroms according the mapper type. Indeed, this ROM is plain. I Indeed, this ROM ... on-the-fly and run MegaROM with such a limited amount of RAM. It's possible to keep some data in VRAM ... such tricks should be hand-crafted for every ROM, it's hard to automate. So, leaving MegaROMs aside, ...

Idea of RAM expansion cartridge

by Eugeny_Brychkov on 02-03-2020, 11:28
Score: 129.23 %, Type: Forum topic , Comments: 25 comments
of MegaROM, first 4Mbyte of SDRAM could be managed with MSX-DOS 2 routines for memory mapped RAM, exceding RAM ... MegaROM there is no added value compared to any of the other devices. Someone else will want SCC, ... into the system and cart may be logically put into the subslot 1 in composite mapper modes (8-14, with internal ...
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