*** M E M O R U M ***

I'd like to see Charlie's Einstein magic SD card system ;) Mark OK, well in that case I will have to bring the Tattie itself, as a ROM is needed (which is currently fitted to mine). Gosh, have not played with that for years. Can't remember how to use the darned thing... it's called "EinSDien" I thi...

Martin, I have gazillions of disks for the Tattie. Including Elite (which is copy protected, unfortunately). Most of them contain productivity software, but I have some games too. I also have a prototype SD card device that emulates a FDD, fits to the 50 way expansion port and has a ROM. It was made...

I have a bag of the buggers. Suspect 4116s that is. I could bring 'em to the 'fest next week if you like. However.. not sure if they really are toast or not - you know how impulsive I am with swapping out chips unnecessarily.. So if you find any good 'uns, I could use 'em back..

Mark, are you planning on building a DRAM tester? That'd be pretty cool!

As Memofest is in Hastings (reasonably nearby) I think attendance might be on the cards (pending permission from the Boss!).. I'd like to bring something, but what? As I haven't really done anything with it of note with my MTX, maybe I could bring something else of interest? Some suggestions: A TRS-...

Thanks Martin

What I'm after is a bit of general CP/M 2.2 disk driver writing advice. I think I have done it right according to the CPM Alteration Guide, but as I said it ain't working. I wonder how you debug the BDOS..?

One for the CP/M hard core guys... and apologies if you read the same question elsewhere! I'm writing a CF adapter driver for a vanilla CP/M 2.2 implementation. The read and write routines are already written and working on a different CP/M device. They use a non standard interface because they're p...

Hi Lez Looks real enough.. there was much discussion about over at VCF, although I'm pretty cynical about it myself as I have several of the real things right here, so don't really need it. Another option was mooted ( http://www.cnx-software.com/2016/02/08/k3-wintel-keyboard-pc-specs-unboxing-and-te...

Bill B wrote:Indirect addressing on Z80 is most efficient using HL.

I did wonder. I suppose I wanted it working first! Yes, 3 t-states with HL vs BC..

(edit:seems to be broken again. I think it is psect areas conflicting)

This is the problem. I am developing it on CP/M with Hi-Tech C 3.09 and there is some corruption going on. Unfortunately the manual, while detailed, doesn't give much guidance on embedding assembler inline in a C program (which this is - and I'm trying to optimise it). It seems to be stable with the...