You still need to have the GEOS128 boot disk in the drive for it to work.  AFAIK the only advantage is that it cuts the boot time down marginally by copying parts of GEOS into memory from the the EPROM before loading the users desktop etc. from the disk.  From the speed increase I saw, it's not worth bothering with.

(resurrects 12 month old thread...)

Much as I love the 6502, the Motorola 6809 is an assembly language programmers wet dream and the ultimate 8-bit computer would surely use one as its CPU.

How I wish the C128 had one instead of the Z80.  In fact, the C128 with a 6809 would be the ultimate 8-bitter

1750 Ram Expansion Unit upgraded to 2MB with KeyDOS in its function ROM socket.

BASIC8 or The Servant in the internal function ROM socket.

Quote from: Andrew Wiskow on May 19, 2008, 11:57 PM
Unless I'm mistaken, I believe Mangelore is working at making his own RAM expander, based on the design of CMD's 1750XL.

The CMD 1750XL uses the same custom DMA controller chip as Commodore's 1750, which no-one has successfully cloned so far.

Quote
The method is long and nasty and requires a command prompt...

command line interfaces don't scare me!

Quote
I'm thinking of writing a tutorial for the process...

That would be great

Quote
All it requires is an opensource tool that's not very bug free

Care to name it/post a link?

Quote
like Microsoft...

Ugh!

Quote
I've uploaded some of the .d64 and .d71 files I've created to this site, but the downloads haven't been approved yet.

Excellent

Quote
Woo Hoo... I'm all beered out tonight!

Quote
transfering the contents of a .zip to something that a Commodore can work with was a little bit of a challenge.

I'd be grateful if you'd describe your transfer method. Cheers.

Paul

Quote from: smfdoes anyone know if they are dual voltage and can run on 230 volts?

North American 1571's are 110V only.

BTW any 1571 that has been stored with its drive door open is probably f*cked.  The upper head will be misaligned due to the crappy thin metal plate head mount being deformed/cracked.

Save yourself the grief and look for one that has been stored with the head protector sheet in place and the drive door closed!

Sorry for the thread hijack

This is what you're after:

http://www.ktverkko.fi/~msmakela/8bit/memory/memory-c128.pdf

Oh, and please upload the twin cities .d64, it's important that this stuff gets archived

Best,

Paul

Quote from: swordfish1030I am thinking of installing Jiffy Dos on my C128 and on 2    1571's.. is there any thing it is not compatiable with?

Installed JiffyDOS 6 in my c128dcr last week

My observations so far:

- C2N Datasette no longer functions (?ILLEGAL DEVICE NUMBER ERROR if attempt is made)

- International keyboard support not working on European machines (eg, ASCII/DIN key etc.)

In both cases it's because the code in the Kernal has been removed to make space for JiffyDOS.
Who cares about these functions though?

- if BASIC8 is running, @ prefix is hijacked by BASIC8 - can't remember if / prefix still works.

Quote from: 11001010Correct me if I'm wrong, but I don't think a switch is necessary for the 1571 drives.

No switch required for the 1581 either.

Quote from: plbyrdI suspect the VDC refreshes its DRAM differently than the main bus and could be the very reason that its memory is completely isolated.  The VDC was designed for systems with varying CPU speeds and video circuitry is particular about timings.

Indeed.  You would have to cross VIC (the master clock generator in the 128) and VDC (which has an independent clock) clock domains to get this to work.  IIRC, this is also the reason you have to wait for the VDC to be 'ready' between accesses.

cheers,
paul

No need to dump the 1571 ROMs as they're already available at http://www.zimmers.net/anonftp/pub/cbm/firmware/drives/new/1571/index.html

Unfortunately, both the 310654-03 and 310654-05 ROMs identify themselves as cbm dos 3.0.  The 318047-01 is the 1571cr ROM and identifies itself as cbm dos 3.1.

The book 'Anatomy of the 1571 Disk Drive' (US title: '1571 Internals') mentions the fact that the 1571 dos is derived from the earlier (PET era) 4040 dual drive, which did have drive 0 and 1.  It also contains a complete annotated disassembly of the 310654-03 firmware (which is pretty heavy reading :/ ).  If I have the time, I'll look for evidence of a 1572 mode and post my findings  

cheers,
paul

Yes, my PAL 1084s has a 'color' control.  Another name for the control would be 'saturation'.

If you're after monochrome composite video output then it's directly available on both the VIC and VDC output connectors.

Do commodore NTSC monitors have a 'hue' control?

Quote from: FManYes, I found the ROMs in the download section after I had posted my message above and came across BASIC8, which I saw was a Function ROM, but for some reason it does not run in VICE. The ROM appears in bank 4, but doesn't activate.

On a real 128 the CONTROL key must be held down during the boot procedure until the BASIC8 splash screen appears.  You'll need to hold down whichever key is mapped to CONTROL in VICE (as it "boots") to get it to work.

This freebie will let you examine any file type: http://www.hhdsoftware.com/Products/home/hex-editor-free.html

I use it at work and recommend it.

Most C128 ROMs have the first few bytes conforming to the format detailed on page 409 of the Commodore 128 Programmer's Reference Guide (ie. you'll see the string "CBM" near the beginning).

Best,

Paul

"COMMODORE 128D DELUXE COMPUTER PACKAGE"

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&rd=1&item=140107845215&ssPageName=STRK:MEWA:IT&ih=004

Registered in South Africa, item located in UK. :ironisk:

No activity on account for at least 6 months. :ironisk:

Has 100% positive feedback but it's all been 'mutually withdrawn'. :ironisk:

Asking £450 buy it now. :ironisk:

Sheesh!

Welcome back Mystik, we've been missing you!

My PC also just crapped out with fried motherboard and cpu   - just the opportunity I've been waiting for really; next PC will run ubuntu

I'm amazed - must have had 40 or so PC's since 1985, all of which died or became useless - yet my c128 lives on...

happy new year!

Paul

hi

Did you try "help pip" from the cp/m prompt?

pip generally follows the following format:
pip drive:{destination filespec}=drive:{source filespec}[option list]
If you're feeling masochistic there's also an interactive prompt version (just type pip and press return [control-c to exit ]).

I made a 1581 copy of cp/m the following way:

System Setup:
internal c128d 1571 device#8 = cp/m drive a:
external 1581 device#9 = cp/m drive b:

* boot cp/m from 1571 (I used the"fastfinal" version but any version will work as long as the format.com file is the June 8, 1987 version which supports the 1581)

* format 1581 floppy
>format
(follow the prompts)

* copy all files from drive a: to drive b: (including system files)
>pip b:=a:*.*[r]

After that I had a bootable 1581 version of cp/m!

To copy files to a specific user area the format would be:
>pip b:[g3]=a:*.*[g1]
which copies all (non-system) files from a: user 1 area to b: user 3 area.

Options can be combined:
>pip b:[g3]=a:*.*[g1r]
copies all files (including system files) from a: user 1 area to b: user 3 area.

Enjoy!

Paul

Quote from: bill.mann... get the utilities that make use of an REU & create a nice fast, large ramdisk.

A ramdisk is installed by default as drive m: if a REU is found at boot on versions of c128 cp/m dated 6 December 1985 or later.

Paul.

Hi

Do you have both 40 column and 80 column monitors connected?  If you only have one connected it may be that the ROM is forcing the C128 to start on the other monitor.

The 128 supports 3 different function ROM configurations in the REU ROM socket (It also has similar support for a ROM in the U36 socket on the C128 motherboard):

1. 16k ROM at $8000 thru $BFFF (ROML)
2. 16k ROM at $C000 thru $FFFF (ROMH)
3. 32k ROM at $8000 thru $FFFF (ROMHL)

A 32k ROM can also be made to appear as two separate 16k ROMs.

A 16k ROM would have a part number such as 27C128 and a 32k ROM would be 27C256.

So you need to determine the size of the ROM and configure the jumpers accordingly.  If you have a 32k ROM you short ROMHL; if you have a 16k ROM short ROML and try booting - if that doesn't work unshort ROML and short ROMH instead.

Note also that there are two types of REU controller chip: an oblong 64pin device and a square 68pin device.  You have the oblong one so you have the 3 jumpers.  REU's having the square one have only one ROM jumper (J2) which can be left as it is for 16k ROMs but the shorting track connecting two of the pads must be cut and then solder the unused pad to the middle pad to use a 32k ROM.

Hope that's of some use to you.

Cheers,
Paul

Two reasons probably.

1. The possibility of running un*x on the c128 is very tempting.  The disappointment of reading unix128.txt and realizing that it was never finished probably explains why the rest of files associated with the project are seldom downloaded.

2. Success breeds success; as it's the most downloaded file it becomes the one most newbies will want to get.

Anyway, hope everyone's enjoying the ROM images I uploaded , all three are in the top 10 most downloaded files :cool:

More historical magazine fun here:

http://www.csbruce.com/~csbruce/cbm/transactor

Hi folks.

Great to see this forum and already, within days of it appearing, there's plenty of good stuff to download

Just added Basic8 and GEOS2.0 rom images for everyones enjoyment.  I have more rom images to upload but they're on my computer at work (he, he - that's where the eprom programmer is) so I'll sort them out later.

The uploader mangled my instructions on how to start Basic8 in rom -  hold the CONTROL key down during system boot until the startup message appears.

Lets hope this place turns into _the_ C128(D(CR)) site!

Best

Paul.