Search found 86 matches

by monsonite
01 Aug 2019, 16:47
Forum: Escape Meta Alt Control Shift
Topic: A very-Tiny BASIC interpreter
Replies: 0
Views: 6685

A very-Tiny BASIC interpreter

Hi All, This BASIC interpreter was featured on Hackaday on 31-7-19 and at 512 bytes long is carefully tailored to fit into a boot sector. Whilst written in 8088 assembly language and has a very limited command set, it shows what can be done with very minimal resources. Anybody interested in Tiny lan...
by monsonite
30 Jul 2019, 22:08
Forum: Hardware and software hacking
Topic: Expansion bus
Replies: 96
Views: 65184

Re: Expansion bus

Martijn,

Fantastic work!

I'm looking forwards to replicating this on my Gigatron.

regards


Ken
by monsonite
27 Jul 2019, 12:46
Forum: Hardware and software hacking
Topic: Expansion bus
Replies: 96
Views: 65184

Re: Expansion bus

Hi xopr, Marcel, This is great progress, and something I must reproduce on my Gigatron. I like your thinking of using an Arduino as a programmable SPI slave. You can program the Arduino to do whatever you want in response to a few SPI commands. There is scope for a common set of commands to access t...
by monsonite
13 Jul 2019, 14:45
Forum: Hardware and software hacking
Topic: v6502
Replies: 20
Views: 16453

Re: v6502

Marcel,

Another useful tool to make v6502 development easier.

I wrote a Z80 disassembler in BASIC whilst at school - but this is very concise.

Good Work!


Ken
by monsonite
03 Jul 2019, 16:29
Forum: Hardware and software hacking
Topic: v6502
Replies: 20
Views: 16453

Re: v6502

Hi Marcel, Pleased to see your interest in VTL02. I first came across this a few years ago when I found the original paper describing this "Very Tiny Language" which appeared initially in 1976 following the introduction of the Altair computer. It was quite an achievement to squeeze a usabl...
by monsonite
15 Jun 2019, 13:18
Forum: Hardware and software hacking
Topic: v6502
Replies: 20
Views: 16453

Re: v6502

Marcel, Thanks for the prompt reply. I was thinking that a 30Hz frame rate might be tolerable - but anything less than that would be hard on the eyes and the brain. Films, back in the old days, were shot at 24 fps, and had a sort of motion blur, depending on the shutter angle - that gave them a soft...
by monsonite
15 Jun 2019, 08:25
Forum: Hardware and software hacking
Topic: v6502
Replies: 20
Views: 16453

Re: v6502

Hi Marcel, This is a colossal, yet worthy sub-project - and judging from your test program, you have already passed the point of proving it to be viable - Well Done! I thought that we hadn't heard from you for a while - and I happened to revisit the Gigatron Github ROM repository yesterday morning w...
by monsonite
08 Jun 2019, 09:42
Forum: Hardware and software hacking
Topic: dual ported SRAM for co-processing
Replies: 5
Views: 3211

Re: dual ported SRAM for co-processing

They are listed in the 1983 TTL Handbook - see page 2-404 in the link below http://bitsavers.trailing-edge.com/components/ti/_dataBooks/1983_TI_ALS_AL_Logic_Circuits_Data_Book.pdf It looks like they are an extended version of the 74xx670 which contained 4 x 4bit registers - which did appear much ear...
by monsonite
30 May 2019, 22:26
Forum: Escape Meta Alt Control Shift
Topic: A TTL Computer Kit from 1974
Replies: 2
Views: 3141

Re: A TTL Computer Kit from 1974

Hi Marcel, I also found the Prosser and Winkel book - and found it very interesting. To find the archive on the LD12, was the "icing on the cake". Two weeks on holiday in Portugal - I have plenty of reading time. I was not aware of the Elektor "Computer 74", but the anycpu.org ha...
by monsonite
29 May 2019, 17:18
Forum: Escape Meta Alt Control Shift
Topic: A TTL Computer Kit from 1974
Replies: 2
Views: 3141

A TTL Computer Kit from 1974

Back in Autumn 1974, the engineers at MITS in Albuquerque were busy developing what was going to become the ground-breaking Altair 8800 microcomputer - for shipment to Popular Electronics Magazine, in time for their January 1975 edition. The Altair 8800 was the first, real commercial microcomputer k...