Search found 177 matches

by lezanderson
02 Jan 2020 15:50
Forum: OFF TOPIC
Topic: Surplus FREE legacy Video display Chips...upd7220, V6366, EF9367
Replies: 1
Views: 212

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: 846

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: 527

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: 514

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: 527

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...
by lezanderson
13 Jul 2019 12:14
Forum: OFF TOPIC
Topic: Homebrew DIY SAM Coupe ?
Replies: 16
Views: 2186

Re: Homebrew DIY SAM Coupe ?

Quazar (For the SAM Coupe) >> https://www.samcoupe.com/ Quazar is currently designig a NEW SAM Coupe ?? Pandemonium - a new SAM! >> *** Extract from the Quazar website * below: **************************************************************************************************************************...
by lezanderson
13 Jul 2019 11:54
Forum: OFF TOPIC
Topic: TMS99105 : Kit of ICs (Chips) for 'Super' Ti-99/4A Homebrew Builders
Replies: 1
Views: 514

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

** TMS99105 Super Ti-99/4A ** For anyone designing or thinking of designing their own ‘Super’ Ti-99/4A microcomputer, I’ve asked a Chinese supplier to list a compilation of ICs which may help get you started. The Heart or Key to the list of ICs is the TMS99105, which is considerably faster than the ...
by lezanderson
08 Jul 2019 11:19
Forum: OFF TOPIC
Topic: The ' Grundy NewBrain' a forgotten micro from the past.
Replies: 0
Views: 886

The ' Grundy NewBrain' a forgotten micro from the past.

The Grundy NewBrain was a 80s Z80 based British microcomputer, now much forgotten. It was based on minimal hardware, probably to keep costs down very much in the style of the ZX81/ZX Spectrum. Hardware consisted of a Z80 CPU, RAM, ROM, a dedicated COP (coprocessor/ULA??) to do most of the Work , in...
by lezanderson
01 Jul 2019 19:07
Forum: OFF TOPIC
Topic: TMS9995 'Mini-Cortex' Homebrew Micro
Replies: 5
Views: 3574

Re: TMS9995 'Mini-Cortex' Homebrew Micro

Free Powertran Cortex ICs If you're building your own Powertran Cortec I may have some surplus 'FREE' chips to help you out. As usual it's First come first Served..! If your just looking for spares for old machines..then look on: eBay.com or https://www.ebay.com/str/5hk1584?_trksid=p2047675.l2563 o...