ROMv5a had a memory detection bug that would erroneously report 128K on my 64K FPGA.He got 64K with version 4 ROM and with 5A, he's getting 128K.
Search found 145 matches
- 18 Aug 2022, 05:22
- Forum: Hardware and software hacking
- Topic: Could a Propeller 2 make a good I/O controller for a modified Gigatron?
- Replies: 7
- Views: 2075
Re: Could a Propeller 2 make a good I/O controller for a modified Gigatron?
- 13 Aug 2022, 07:12
- Forum: Hardware and software hacking
- Topic: Novatron
- Replies: 36
- Views: 8893
Re: Novatron
Nice!!! You should be able to split the PULSE and LATCH pins and use a switch to select between keyboard and controller DATA? I've never tried swapping mid-stream, so not sure if you can get away without a reset for some edge conditions. While I understand the tradeoff you made for the RAM expander ...
- 30 Jul 2022, 07:32
- Forum: Escape Meta Alt Control Shift
- Topic: Gigatron ASIC and the Gametron Handheld
- Replies: 37
- Views: 35546
Re: Gigatron ASIC and the Gametron Handheld
https://www.hackster.io/news/google-sky ... e644a9529d
https://www.theregister.com/2022/07/29/ ... r_os_chips
now 90nm!!! There's more hope for the SRAM and ROM fitting now.
https://www.theregister.com/2022/07/29/ ... r_os_chips
now 90nm!!! There's more hope for the SRAM and ROM fitting now.
- 30 Jun 2022, 01:29
- Forum: Hardware and software hacking
- Topic: Gigatron Clone Ideas
- Replies: 46
- Views: 9326
Re: Gigatron Clone Ideas
Schweet! Fixed the FPGA code by adding if(cu_pl_n) to the PC increment. Tested on ROMv3/v4/vX0. (Love those DIP switches!)
- 29 Jun 2022, 02:21
- Forum: Hardware and software hacking
- Topic: Gigatron Clone Ideas
- Replies: 46
- Views: 9326
Re: Gigatron Clone Ideas
Sounds consistent with the two known failures we've been talking about.
- 28 Jun 2022, 15:47
- Forum: Hardware and software hacking
- Topic: Gigatron Clone Ideas
- Replies: 46
- Views: 9326
Re: Gigatron Clone Ideas
https://forum.gigatron.io/viewtopic.php?p=2301#p2301 Hmm... Looks like exactly the same thing. I haven't seen this myself, though I have had other strangeness happen specifically on ROMv3 Pictures when it showed Jupiter. Are Blinkenlights still running? I assume that you already received your Famico...
- 28 Jun 2022, 11:44
- Forum: Hardware and software hacking
- Topic: Would emulating vCPU on a Propeller 2 be feasible?
- Replies: 10
- Views: 2500
Re: Would emulating vCPU on a Propeller 2 be feasible?
I've been toying with that idea too. The 8 PIOs offload much of the serial data manipulation from the main dual core M0+. It's crazy when you think about how much processing power you get for $4.
- 28 Jun 2022, 01:05
- Forum: Hardware and software hacking
- Topic: Gigatron Clone Ideas
- Replies: 46
- Views: 9326
Re: Gigatron Clone Ideas
Congrats! I'm curious... what make/model RF modulator?
- 10 Jun 2022, 22:12
- Forum: Hardware and software hacking
- Topic: Gigatron Clone Ideas
- Replies: 46
- Views: 9326
Re: Gigatron Clone Ideas
The Gigatron avoids this issue by having a single OR-gate between the write enable and clock (U16A). The ~WE signal is one of the first to change from low to high and makes sure the write recovery (address change) happens after the write enable has ended. The ~WE I'm using goes through the GAL and ...
- 31 May 2022, 21:44
- Forum: Escape Meta Alt Control Shift
- Topic: Gigatron ASIC and the Gametron Handheld
- Replies: 37
- Views: 35546
Re: Gigatron ASIC and the Gametron Handheld
The 128Mbit Intel Strataflash between the FPGA and DIP switches stores multiple Gigatron ROM images. The board is laid out such that it can support up to a 256Mbit part that would give you 256 DIP switch selectable 64kx16 ROM images. The IDT SRAM is actually 256kx16 with high/low byte enables. I don...