Search found 64 matches

by monsonite
03 Feb 2020, 01:20
Forum: Kit assembly gallery
Topic: Built Gigatron with IC sockets
Replies: 6
Views: 310

Re: Built Gigatron with IC sockets

Hi ECL, I built mine up entirely using sockets too. Rather than glue, I would tack the socket in place by soldering two diagonally opposing pins. Unfortunately I had just one badly soldered joint - so on first power up, operation was intermittent - but with full visual inspection - easily solved. Th...
by monsonite
28 Dec 2019, 12:09
Forum: Hardware and software hacking
Topic: dual core Gigatron CPU
Replies: 55
Views: 2685

Re: Opcode mods

Hi PurpleGirl, Using a ROM as the instruction decoder is an often used approach, but the problem is with the speed an instruction can be decoded. Fast ROMs are not very common these days and the AT27C1024 from Microchip/Atmel has an access time of 45nS. You might find that you could sample a batch o...
by monsonite
17 Nov 2019, 00:44
Forum: Escape Meta Alt Control Shift
Topic: Forth Day 2019
Replies: 5
Views: 469

Re: Forth Day 2019

Thanks Everyone,

Its been a very enjoyable day - Chuck has just finished his "Fireside Chat" presentation.

I have put a pdf of my slides online at my github repository

https://github.com/monsonite/Forth-Day-2019


Best from Stanford,


Ken
by monsonite
16 Nov 2019, 21:59
Forum: Escape Meta Alt Control Shift
Topic: Forth Day 2019
Replies: 5
Views: 469

Re: Forth Day 2019

Hi All, My presentation on the Gigatron was well received at Forth Day here at Stanford University. I presented a Gigatron kit, to Forth Founder, Chuck Moore, in appreciation for his lifetime contributions to computer science. Another kit went to Andreas Wagner, an enthusiastic young Forther, who is...
by monsonite
25 Oct 2019, 14:55
Forum: Hardware and software hacking
Topic: A Forth for Gigatron?
Replies: 10
Views: 1329

Re: A Forth for Gigatron?

That sounds like it would be a bit more than a casual hack :D I would try to leave the ROM alone and that would keep things a lot simpler. From an awkward 8-bit Harvard machine, that has to handle video timing with careful instruction timing, you come up a level to vCPU, which is already a 16-bit ma...
by monsonite
22 Oct 2019, 14:55
Forum: Hardware and software hacking
Topic: A Forth for Gigatron?
Replies: 10
Views: 1329

Re: A Forth for Gigatron?

Hi Marcel, Thanks for the encouragement and useful advice. I have found a modern Forth for 6502 in Tali Forth which might be a suitable candidate. I'll be posting on the 6502.org forum to see if the project gains any traction. Like I said elsewhere, I'm going to be taking a couple of Gigatrons with ...
by monsonite
21 Oct 2019, 12:02
Forum: Hardware and software hacking
Topic: Pluggy Reloaded
Replies: 59
Views: 2986

Re: Pluggy Reloaded

Hi Norgate, I'd be happy to give you a hand laying out the pcb. I have 10 years experience of EagleCAD - and this sounds like the sort of project that could be done using the (free) EagleCAD Lite version. I have also developed a very compact interpreted language called SIMPL, which is ideal for usin...
by monsonite
21 Oct 2019, 11:27
Forum: Hardware and software hacking
Topic: A Forth for Gigatron?
Replies: 10
Views: 1329

A Forth for Gigatron?

Forth is a programming language and computing environment developed by Charles H. Moore throughout the 1960s. It is ideal for resource limited computers and a means of being able to work directly on the machine without having to have be reliant on layers of unknown operating systems. In the 1970s it...
by monsonite
21 Oct 2019, 10:45
Forum: Hardware and software hacking
Topic: Pluggy Reloaded
Replies: 59
Views: 2986

Re: Pluggy Reloaded

Hi Norgate, I recently came across a very low cost Arduino clone from Malaysia called the Maker UNO which has the advantage of Blue LEDs to show the state of all I/O pins and a small speaker on one of the I/O pins. https://www.robotshop.com/uk/cytron-maker-uno-microcontroller.html?gclid=Cj0KCQjwrrXt...
by monsonite
21 Oct 2019, 10:06
Forum: Hardware and software hacking
Topic: Pluggy Reloaded
Replies: 59
Views: 2986

Re: Pluggy Reloaded

Hi Norgate, The ATmega328 will need a 16MHz crystal across pins 9 and 10 and 2 x 22pF capacitors to ground - in order to keep it fully compatible with the Arduino bootloader serial timing. The standard Arduino will accept interupts on Dig 2 and Dig 3 - make sure that you have these connected correct...