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

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...

Or this: #asm psect text global _Curschar global _Fileend ;Init ld bc,(_Fileend) ;p=Fileend loop1: dec bc ;p-- ld a,(bc) ;get char to be moved (swap=*p) inc bc ;copy it (p++) ld (bc),a ;..to p (*p=swap) ld h,b ld l,c ld de,(_Curschar) ;have we reached the insert point? dec bc ld a,h cp d jp nz, loop...

Here's a straightforward bit of programming for you! Consider the following C code: char *p; for ( p=Fileend; p>Curschar; p-- ) { *p = *(p-1); } What it does is move a block of memory from Curschar to Fileend one byte up (to open a place in a buffer for a character that's about to be inserted). I re...

You could get the menu program to inject the launch command direct into the CCP's command buffer then jump to the routine that interprets it.. Now that would be cool, but you would need to work out where everything is by disassembling the CCP and comparing with a copy of the source (such as the one ...

Quick update, I scored some more retro swag Another 48k Speccy Apple G4 iMac "lamp stand" G3 iMac "snow" Dual G4 PowerMac Tandy TRS-80 Model 4 128k, dual drives, hard drive via CF card Tandy TRS-80 Model II with 8" floppy A Multicomp (not retro, a sort of hardware emulation ...

That's true Mark and as I recall no one was worried about waiting for orders to come in - it was the lack of communication after handing over your cash that worried people. If Zaxon's improved in this respect that can only be for the good.

Zaxon had an... errm... allegedly mixed reputation on the Atari forums with UltraSatan units. Just saying... Assuming it's the same guy.