Search found 34 matches

by Bloodnok
Fri Aug 17, 2018 5:16 am
Forum: Software & Programming
Topic: How to get The Pawn up and running with the vDriveQL
Replies: 0
Views: 714

How to get The Pawn up and running with the vDriveQL

If you've got a vDriveQL and would like to play The Pawn adventure game then here's what to do: Due to the need to swap cartridges in mdv1_ and mdv2_ during game loading, and not being able to return to the command line to change the vDriveQL config using the vDriveQL toolkit, two SD cards are neede...
by Bloodnok
Thu Jan 04, 2018 5:58 pm
Forum: Hardware
Topic: Tetroid Disk Interface - FORMAT issue
Replies: 12
Views: 2547

Re: Tetroid Disk Interface - FORMAT issue

The problem shows up when using the FORMAT ram1_mdv1 command to copy an entire Microdrive cartridge to ram drive. The Microdrive content appears to transfer OK but the files are corrupt in the ram drive (reading them back fails). The command works OK in versions of the Trump card firmware prior to 2...
by Bloodnok
Sat Dec 23, 2017 3:15 am
Forum: Hardware
Topic: Tetroid Disk Interface - FORMAT issue
Replies: 12
Views: 2547

Re: Tetroid Disk Interface - FORMAT issue

Did some more work on this and have found the following: 1. Installing the ramprt ram disk driver from a Qpac2 package works as expected on the Tetroid interface so hardware is probably fine. 2. Reverted to an old firmware version for the interface which had TC1.31 and TK 2.23. This was the version ...
by Bloodnok
Thu Dec 14, 2017 3:19 am
Forum: For Sale
Topic: QL vDrives for Sale
Replies: 1
Views: 668

QL vDrives for Sale

A limited number of QL vDrives (and a few ZX as well) are on sale now on SellMyRetro ( https://www.sellmyretro.com/offer/details/29035) Definitely the last lot for this year! If you're not sure what a QL vDrive is and what it can do, please check out the website for more information (https://vdrivez...
by Bloodnok
Fri Dec 08, 2017 9:18 am
Forum: Hardware
Topic: ZX Interface I - under the hood
Replies: 5
Views: 1077

Re: ZX Interface I - under the hood

I believe this is what the extra transistor (Q11) is for.... To quote from the service manual: 'When /IORQ is asserted from the Spectrum, the Spectrum's own ULA may inhibit the CPU clock for several cycles. Transistor Q10 disables this action for any I/O transaction except for those during which A0 ...
by Bloodnok
Sun Dec 03, 2017 1:33 am
Forum: Hardware
Topic: Microdrive Unit Design
Replies: 118
Views: 17514

Re: Microdrive Unit Design

Hi, I would have jumped in earlier but I've been snowed under building vDrives! Gently prompted by Martyn (Hill) I've managed to put something together which hopefully helps the discussion. To better understand how data is encoded for the Microdrive here's a diagram: Header Decode-edit-resize.jpg As...
by Bloodnok
Thu Sep 21, 2017 12:24 am
Forum: Hardware
Topic: vDrive ZX: emulated ZX Microdrive
Replies: 25
Views: 4846

Re: vDrive ZX: emulated ZX Microdrive

stephen_usher wrote:Any thoughts about an internal version for the QL?


Could be refactored to replace mdv2_ I guess. Just needs a new PCB and mounting frame. If there's enough demand I'd certainly look into it. In the meantime it looks like I may be a bit busy :lol:
by Bloodnok
Wed Sep 20, 2017 9:06 pm
Forum: Hardware
Topic: vDrive ZX: emulated ZX Microdrive
Replies: 25
Views: 4846

Re: vDrive ZX: emulated ZX Microdrive

vDrive QL Update A few answers to some few pressing questions... First up, price. Both the QL and ZX versions will be offered at the same price as the original Microdrive, £49.95. The vMap QL will be at £15.95. I'll be making them in batches of 5-10 and they'll be available to buy from SellMyRetro. ...
by Bloodnok
Tue Apr 18, 2017 9:04 am
Forum: Hardware
Topic: Using ZX Microdrives on the QL
Replies: 52
Views: 8238

Re: Using ZX Microdrives on the QL

Checked my ZX drives and found a slightly later one (if they were numbered sequentially):
ZX MD Serial.jpg
ZX MD Serial

Doesn't format or save unfortunately. Resistor values are r4=150/r5=180 as expected.
by Bloodnok
Mon Apr 17, 2017 11:42 am
Forum: Hardware
Topic: Using ZX Microdrives on the QL
Replies: 52
Views: 8238

Re: Using ZX Microdrives on the QL

I've had the same experience with unmodified ZX drives. Only managed to find one to work with the QL (out of the 10 or so tested so far). And that was only after recalibrating the motor speed (2400rpm unloaded or 2250rpm loaded seems optimum). I haven't been able to locate copies of the articles men...