Search found 181 matches

by lezanderson
14 Feb 2020 12:06
Forum: OFF TOPIC
Topic: Forgotten (Legacy) Microcontrollers from Yesteryear !
Replies: 1
Views: 241

Re: Forgotten (Legacy) Microcontrollers from Yesteryear !

Designing your own Homebrew Mini PC with the D70320 (V25) MCU. [/size][/u][/i][/b] Firstly the D70320 is an enhanced 8088 based micro comptroller (MCU). Using a D70320 as the CORE to a homebrew ‘Mini’ PC will significantly simply the design. Eliminating the needs for several of the usual peripheral...
by lezanderson
13 Feb 2020 12:20
Forum: OFF TOPIC
Topic: PCBs for Spectrum Clones
Replies: 17
Views: 814

Re: PCBs for Spectrum Clones

Not that I have been paying much attention recently, but last year (or was it 2018) there was a moan about there being no published schematic for the Just CPC PCB. I recall on another forum, a member having difficulty fault finding it when it did not work. Mark I believe there's soon to be released...
by lezanderson
11 Feb 2020 12:35
Forum: OFF TOPIC
Topic: PCBs for Spectrum Clones
Replies: 17
Views: 814

Re: PCBs for Spectrum Clones

Cool ! :D You certainly work fast, it seems like only a day or two ago I posted them to Bill ! ** I've got some more ZX Harlequin (Spectrum clone) PCBs , if anyone is interested. I'n trying to get some Just CPC (Amstrad Clone) Boards and some Omega MSX-2 (Mainboard+Keyboard PCBs) for those that are...
by lezanderson
08 Feb 2020 12:34
Forum: OFF TOPIC
Topic: Forgotten (Legacy) Microcontrollers from Yesteryear !
Replies: 1
Views: 241

Forgotten (Legacy) Microcontrollers from Yesteryear !

Forgotten , Legacy Micro controllers from yesteryear  A long long time ago when Dinosaurs Roamed the earth and you could afford to buy a brand new house at a reasonable price, then these microcontrollers (MCUs) were quite popular.Now most are forgotten,but they are still useful to the DIY Homebrew ...
by lezanderson
02 Jan 2020 15:50
Forum: OFF TOPIC
Topic: Surplus FREE legacy Video display Chips...upd7220, V6366, EF9367
Replies: 1
Views: 447

Surplus FREE legacy Video display Chips...upd7220, V6366, EF9367

Thinking of design / building your own Graphics Card / video board ? Then I have some surplus legacy video Chips you can have for FREE ! [/size][/color] NEC µPD7220 >> D72020   ..The High-Performance Graphics Display Controller 7220 (commonly μPD7220 or NEC 7220) is a video display processor capabl...
by lezanderson
05 Oct 2019 11:12
Forum: OFF TOPIC
Topic: The British Camputers Lynx Microcomputer
Replies: 6
Views: 1186

Re: The British Camputers Lynx Microcomputer

Free ICs !! Hi. I've got some surplus ICs to give away ( for Free! ) to anyone into homebrew & DIY microcomputer building. Z80 CPUs DIP40 (NMOS/CMOS) type 128K SRAMs DIP32 64K EEPROM (W27C512 etc) DIP28 6845 CRTCs DIP40 82C55 Intel type PIO DIP40 82C51c Intel type SIO DIP SN76489 Sound Chips DIP MA...
by lezanderson
15 Jul 2019 11:19
Forum: OFF TOPIC
Topic: More Free Chips to Good Home
Replies: 1
Views: 808

Re: More Free Chips to Good Home

Mini Memotech MTX ? Is anyone thinking of designing their own 'Mini' Memotech ? for anyone that is i've got some FREE chips they can have to get you started. Z84C00xx CPUs DIP/PLCC Z80 CTC DIP/PLCC UM61256-xx 32K Fast SRAMs Skinny DIP UM61512-xx 64K Fast SRAM Skinny DIP IS61C1024-xx 128K Fast SRAM ...
by lezanderson
15 Jul 2019 11:10
Forum: OFF TOPIC
Topic: TMS99105 : Kit of ICs (Chips) for 'Super' Ti-99/4A Homebrew Builders
Replies: 1
Views: 789

Re: TMS99105 : Kit of ICs (Chips) for 'Super' Ti-99/4A Homebrew Builders

Musings and ideas on the design of a Enhanced Ti-99/4A Design Specification : CPU (Central processor Unit): TMS99105 24MHz processor. A improved and much faster version of the original TMS9900 CPU. Memory System Memory Mapper 74xx612 (74HCT612) to allow 1 Meg of RAM/ROM. The system would boot to 12...
by lezanderson
13 Jul 2019 12:24
Forum: OFF TOPIC
Topic: More Free Chips to Good Home
Replies: 1
Views: 808

More Free Chips to Good Home

I've still got some Surplus Chips..! Anyone building their own homebrew microcomputer may be interested. These are mainly PLCC type but some are DIP or Skinny DIP Z80 CPUs PLCC44 (Z84C0020VEC type) Z180s PLCC SRAM,EPROM DIP PLCC TMS9918ANL/TMS9929ANL DIP 8477 PLCC Advanced Floppy disk controllers M...