I don't have issues with the KFF in my SX64 regardless of the cable to the expansion port.
Are you using the right version, e.g. pal or ntsc? Also try loading the latest version of the firmware onto the KFF.
Posts by Sjaak74
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OK, gewonnen.
Dieser Hardwarenachbau ist mir völlig unbekannt und ich habe ab 1995 alles an Hardwarenachbauten/Entwicklungen für den C64 gesammelt und auf CDs gebrannt.Letztes Jahr hatte ich dann alles auf 25GB M-Disc (Blurays ohne organische Bestandteile) gebrannt. Der Nachbau hat sich wohl aufgrund des PCB und der anderen Komponten nicht gelohnt.
Zudem bezahlte man zu der Zeit ja auch keine Märchenpreise, bei dem man denken muss, ist das PCB mit goldenen Leiterbahnen bestückt oder lagert der Motor auf Rubine, Zwecks Verminderung der Reibung.
Are you planning to release those info? I recently rediscovered my 64 and love to have more hardwareprojects for it..
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can you post also pictures from the side?
Sehr tolles found!
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Sowas wie ein Action Replay etc. ?
Sozusagen der Ur-Vater des Action Replay.
Der Vorteil (aber auch Nachteil) ist, man kann/muss die Firmware laden, weil es RAM hat statt EPROM.
Ich hatte eines als Jugendlicher.
Es ist wirklich genial.
Und es gibt abartig viel Software zu dem Teil.
Aber es ist wohl eher was für Hacker ...
Man muss schon sehr genau wissen was man tut.
Für den Normal C64 Benutzer rate ich eher zu einem AR6 oder einem Nordic Replay.
I had one also. I only remember the software that came along with it.
I found the archive on Expert Cartridge - ReplayResources (pokefinder.org) Are there more programs more this? They all seem simular
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You can also use this program: zzarko / magic-desk-cartridge-generator — Bitbucket
Not completly suitable for just 1 prg but handy to make a compilation.
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I know they are different but hopes the wrom could be dumped (is it located at the same memory region as regular kickstart?) To a rom for the other amiga's
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I'm wondering would it be possible to dump this and run it on a regular Amiga (500, 2000 etc)?
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I'm in the progress of restoring a SX64. Currently it has an issue on the main cpu board (whte screen), probably due to a gone wrong socketing
I noticed missing pads and a few missing traces.Are there any good scans of the boards in the SX64? Googling didn't find any, but i would help me a lot in restoring this thing
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i did tap mine from the IO board. I made an internal magicdesk cart which provides 5v. More info here: https://smdprutser.nl/blog/add-a-512kb-magicdesk-to-a-sx64/
Yes i have some assembled but my sx64 decided to die. So cannot test them atm
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the 10 seconds copy is a nice addition to the megalodos. Nice work. It is kinda the turbotrans ramdisk clone? Prolly using a trackread from an other speeder?
The 10 sec. Copy has nothing to do with other Copy programs and nothing to do with Turbotrans.
I have disassembled some code (Dolphin 2, 15 Sec. Copy, SuperCard+ ROM, Prof-DOS ...) to learn how other solves some problems.
I have tested all this code to understand how it works.
And I saw things running good or not so good.
But I did my own thing with 10 sec. copy, using special features of the MeGALoDOS (HW GCR decoder, Banking, ...).
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The Turbotrans RAMdisk hardware is fully emulated in MeGALoDOS.
But I didn't use this Hardware.
I like 8KB banks holding one track of disk.
For me it seems much easier to handle ...
I assumed you used the ramdisk functions from turbotrans ramdisk to quickly load a disk.
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For the MeGALoDOS I've made a WIKI page, sorry it is in german only ...
https://oe7twj.at/index.php?title=FremdeProjekte/MeGALoDOS
I also had a RAM/ROM board for my 1541 (bevore MeGALoDOS) with 8KB RAM and 32KB EPROM.
Simply said the MeGALoDOS it is also a RAM/ROM board for the 1541.
But Tommi_nrw has made many other features for this wonderful board:
- 1024K RAM
- 512K Flash memory (as EPROM but programmable from the 1541 itself)
- a CPLD make possible to have many Memory Configurations (switchable)
- an Arduino
- OLED display
- rotary encoder for User Input
- some very good hardware tricks nessecary to emulate old Speeder hardware
So it is possible to switch between many DOS variants:
- Professional Dos (RAPI DOS)
- Prologic DOS 1.6 (nicht classic)
- Dolphin DOS 2.0
- SpeedDOS Expert
- QuickDOS
- SpeedDOS
- S-Jiffy DOS
- Jiffy DOS
- CBM DOS 2.6 mit Fix-Patches
- Turbo Access 2.7
- Turbo Trans 3.4 mit 512kb RAM-Disk
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The 10 second copy is a utility running on a Floppy drive with MeGALoDOS.
It can read a whole disk into the MeGALoDOS RAM.
After this you can write this back to another disk.
Cause a whole disk is in RAM, you dont need to change disks often for copiing.
And you can write it on more than one disk (for multiple copy).
This is done with a programm written for the 1541 called "trackload".
The 1541 can LOAD and execute "trackload" simply by sending the filename to channel #15.
You don't need the BASIC program for executing "trackload".
You can simply use it by sending commands to your 1541:
- @&trackload
- @u3
- @u4
Line (1) loads the code.
Line (2) read a disk into RAM.
Line (3) write from RAM to a new disk.
U4 does also format a Disk, so you can use a new disk without need to format it.
My RAMROM implemention is a bit alike megalodos. It features a 2 Mbit flashrom and 256K SRAM and the CPLD supports mapping ROM and RAM at various location in the addressing space of the 6502. It is lacking the bit shuffling of profidos, but for now Dolphin DOS is good enough. It lacks the arduino, OLED and rotary encoder, which is fine for my as it is fitted into a SX64 and i don;t think an OLED would fit into a vintage device. Probably gona use bubble display or 7 segment display with a rotary with vintage knob
Will post pictures if it ever gets into a more polished state. Unfortunately the SX has a white screen and it is nonworking at the moment so nothing much happening here soon :).
the 10 seconds copy is a nice addition to the megalodos. Nice work. It is kinda the turbotrans ramdisk clone? Prolly using a trackread from an other speeder?
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If the U64 board does not supply a stable PHI2 clock on the expansion port during power on that could explain issue but as I don't own a U64 this is purely guesswork.
Good guess - At the time where the U64 is powered on the FPGA needs to be loaded and started, therefore some time passes before PHI2 is available.
Das Laden und starten von .PRGs und .D64 klappt aber. Also wird doch das KFF ordentlich gestartet? Bzw. wo ist der Unterschied zum Start einer .CRT von der SD-Karte im Gegensatz zu .PRG und .D64?
Does it help if you keep the KFF in reset for a couple of seconds or wait a bit and reset the KFF?
The reset button is connected to the reset of the MCU (and some resistors/transistors make sure the C64 is also reset). THis perhaps can resync to the PHI2 clock.
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Both. I dont have a megalodos though (i have a ramrom which runs dolphindos just fine)
I think the dd mean you are using the dolphin dos diskfunctions?
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can you also enlighten more on the technical side of it?
I was too young at the time to fully comprehend the commodore, but now it is fascinating and more understandable for me.
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Wished it was a 1540048 PCB as I have a drive with defective pcb
What is wrong with your PCB? Normalyit can be repaired and you do not need a new PCB.
It has got a couple of ripped traces. It can be done. but this is also neat.
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to my S64
What is a S64??
I ment SX64. Also mt keyboard has issues
better sockets (machined sockets)
What's that? Precision IC sockets???
I think the official word is machined, but they sometimes called that
Short pin chips have usually been "cut" instead of being desoldered properly.
You could solder them into a precision socket to extend the legs - it's what I usually do.I personally desoldered them, but they have been filed off to make the other side less protruding. around 1 mm.
Prolly need to do this.
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I decided to add better sockets (machined sockets) to my S64, but it doesn't work anymore
I noticed some of the chip have shorter legs and doesn't make a solid connection with the socket (they are a bit loose) Also most of my desoldered chips from a regular (scrap) C64 board have it also. Is there a proper (?) way to extend the legs easily?
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i think they are compatible (have both revisions but not next to each other so cannot check)
The leds are different colors red and green vs green and yellow (anyone know a source of them as i like the 'old' colors)
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Ah thanks for the clarification. I can reuse all parts of it?
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Wished it was a 1540048 PCB as I have a drive with defective pcb
Still it is amazing people doing this things.
