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GeneralRe: Yet another thought for some other day Pin
DRHuff15-Feb-19 9:51
MemberDRHuff15-Feb-19 9:51 
GeneralWill it ever end? Pin
CodeWraith14-Feb-19 23:56
MemberCodeWraith14-Feb-19 23:56 
GeneralRe: Will it ever end? Pin
Mike Hankey15-Feb-19 0:43
professionalMike Hankey15-Feb-19 0:43 
GeneralRe: Will it ever end? Pin
OriginalGriff15-Feb-19 1:14
mveOriginalGriff15-Feb-19 1:14 
GeneralRe: Will it ever end? Pin
Mike Hankey15-Feb-19 1:19
professionalMike Hankey15-Feb-19 1:19 
GeneralRe: Will it ever end? Pin
CodeWraith15-Feb-19 1:41
MemberCodeWraith15-Feb-19 1:41 
GeneralRe: Will it ever end? Pin
Mike Hankey15-Feb-19 1:47
professionalMike Hankey15-Feb-19 1:47 
GeneralRe: Will it ever end? Pin
CodeWraith15-Feb-19 2:12
MemberCodeWraith15-Feb-19 2:12 
This year my old Elf II will be 41 years old. The bus connectors and the keys are worn out and the whole computer suffers from bad contacts. For my experiments it's slowly becoming better to build a new one. How about this:

- 16 Mb RAM in separate three banks, no ROM in the memory map
- BIOS (or anything else) will be loaded by a microcontroller via DMA. The microcontroller also takes care of the processor modes, so that the computer can stay compatible to the old Elves and still boot like a more modern computer.
- traditional bit banged serial interface, like the old Elf
- traditional bit banged cassette interface, again to stay compatible to the old Elf
- PS/2 mouse and keyboard connectors, so that you can use more modern input devices
- Alternatively a real UART and a serial to USB converter.
- A DIY IDE port to connect one or two Compact Flash cards as 'hard drives'.
- The old CDP1861 graphics chip is extremely hard to get. I have one, just in case the old Elf ever suffers a terrible accident, so it's off limits. How about building a single board Elf with, let's say, 1 Mb graphics RAM, a MC6847 graphics chip and some yet to be determined interface to the main processor (the DGP, decelerated graphics port Smile | :) ) I want to have vector graphics on my Elf.
I have lived with several Zen masters - all of them were cats.

His last invention was an evil Lasagna. It didn't kill anyone, and it actually tasted pretty good.

GeneralRe: Will it ever end? Pin
Mike Hankey15-Feb-19 3:18
professionalMike Hankey15-Feb-19 3:18 
GeneralRe: Will it ever end? Pin
CodeWraith15-Feb-19 3:38
MemberCodeWraith15-Feb-19 3:38 
GeneralRe: Will it ever end? Pin
Mike Hankey15-Feb-19 3:46
professionalMike Hankey15-Feb-19 3:46 
GeneralRe: Will it ever end? Pin
CodeWraith15-Feb-19 4:04
MemberCodeWraith15-Feb-19 4:04 
GeneralRe: Will it ever end? Pin
Mike Hankey15-Feb-19 8:23
professionalMike Hankey15-Feb-19 8:23 
GeneralRe: Will it ever end? Pin
CodeWraith15-Feb-19 8:45
MemberCodeWraith15-Feb-19 8:45 
GeneralRe: Will it ever end? Pin
Mike Hankey15-Feb-19 8:52
professionalMike Hankey15-Feb-19 8:52 
GeneralRe: Will it ever end? Pin
CodeWraith15-Feb-19 9:06
MemberCodeWraith15-Feb-19 9:06 
GeneralRe: Will it ever end? Pin
Mike Hankey15-Feb-19 9:08
professionalMike Hankey15-Feb-19 9:08 
GeneralRe: Will it ever end? Pin
CodeWraith15-Feb-19 10:33
MemberCodeWraith15-Feb-19 10:33 
GeneralRe: Will it ever end? [WARNING: Old fart war story] Pin
Gary Wheeler15-Feb-19 1:45
MemberGary Wheeler15-Feb-19 1:45 
GeneralRe: Will it ever end? [WARNING: Old fart war story] Pin
Mike Hankey15-Feb-19 1:50
professionalMike Hankey15-Feb-19 1:50 
GeneralRe: Will it ever end? [WARNING: Old fart war story] Pin
Gary Wheeler15-Feb-19 2:01
MemberGary Wheeler15-Feb-19 2:01 
GeneralRe: Will it ever end? [WARNING: Old fart war story] Pin
Mike Hankey15-Feb-19 3:22
professionalMike Hankey15-Feb-19 3:22 
GeneralRe: Will it ever end? [WARNING: Old fart war story] Pin
Gary Wheeler15-Feb-19 3:32
MemberGary Wheeler15-Feb-19 3:32 
GeneralRe: Will it ever end? [WARNING: Old fart war story] Pin
Mike Hankey15-Feb-19 3:49
professionalMike Hankey15-Feb-19 3:49 
GeneralRe: Will it ever end? [WARNING: Old fart war story] Pin
Gary Wheeler15-Feb-19 3:52
MemberGary Wheeler15-Feb-19 3:52 

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