[MAME] Emulating the MTX

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Dave
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Re: [MAME] Emulating the MTX

Post by Dave » 08 Feb 2019 23:13

Hi,

That’s good work!

I thought that I would have dumped the SDX 80 column card ROMs, but it appears not. I will do it next week.

You could just copy files to and from the RAM disk to test it?

I don’t know of any Memotech MTX (or CP/M) software that actually pages >64k

Regards
Dave

Pernod
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Re: [MAME] Emulating the MTX

Post by Pernod » 08 Feb 2019 23:45

Dave wrote:
08 Feb 2019 23:13
I thought that I would have dumped the SDX 80 column card ROMs, but it appears not. I will do it next week.
Thanks, that would be really useful.
Dave wrote:
08 Feb 2019 23:13
You could just copy files to and from the RAM disk to test it?
But I need to format it first. Looks like multiple formatters on the SDX CP/M System Disk, FORMAT, FRMSDX, and SIDFMT. Tried SIDFMT F: and asks Type CR to go ahead, then nothing. I'm not seeing any IO in &50-&5F which is where I believe it should be accessed?
- Nigel

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Martin A
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Re: [MAME] Emulating the MTX

Post by Martin A » 09 Feb 2019 00:14

You'll probably want Andy's REFORMAT.COM. It works with pretty much all the drive types.

Bill B
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Re: [MAME] Emulating the MTX

Post by Bill B » 09 Feb 2019 15:47

F: is usually a RAM disk not a Silicon Disk. It uses the pages above 64K on the MTX. So you should see activity on the page port (0x00) not on the Silicon Disk I/O ports. SIDISC formats both RAM disk and Silicon disks.

Pernod
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Re: [MAME] Emulating the MTX

Post by Pernod » 09 Feb 2019 17:06

Bill B wrote:
09 Feb 2019 15:47
F: is usually a RAM disk not a Silicon Disk. It uses the pages above 64K on the MTX.
Of course, the clue was in my previous screenshot "F: is type 51 - 512Kb RAM disc". Managed to format F:, copy over the SDX System Disk, and run NewWord from it, so looks good.

So how do I configure the Silicon Disc? Tried CONFIG F:41 but gave ERROR and CONFIGURATION ABORTED!
- Nigel

BBC Model B, ATPL Sidewise, Acorn Speech, 2xWatford Floppy Drives, AMX Mouse, Viglen case, etc.

Martin A
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Re: [MAME] Emulating the MTX

Post by Martin A » 09 Feb 2019 21:02

Silicon discs have a driver - SIDISC.COM that needs to be loaded first.

It's not compatible with Andy's RAM disc code though, they both use the same drive letters and high memory.

There's 2 copies in the ZIP along with a re-built source that formed the basis of the SiDisc drive built into the CFX 2 boot rom.

I can't remember which one was the one that worked though, maybe even both work.
SIDISC.ZIP
(15.18 KiB) Downloaded 6 times

Pernod
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Re: [MAME] Emulating the MTX

Post by Pernod » 13 Feb 2019 16:03

Dave wrote:
08 Feb 2019 23:13
I thought that I would have dumped the SDX 80 column card ROMs, but it appears not. I will do it next week.
Any movement on this?

I'm also looking for any original SDX ROM dumps, not remakes as used in MEMU. The only one I can be sure of is the CP/M ROM from http://www.primrosebank.net/computers/m ... 12roms.htm.

I had previously not realised the SDX 512K was effectively a RAM expansion board, and incorrectly assumed it was only accessible through the Silicon Disc ports.
- Nigel

BBC Model B, ATPL Sidewise, Acorn Speech, 2xWatford Floppy Drives, AMX Mouse, Viglen case, etc.

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1024MAK
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Re: [MAME] Emulating the MTX

Post by 1024MAK » 13 Feb 2019 21:49

http://www.primrosebank.net is Dave’s site :D

Mark

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