Rev 0.1
Proposed specification
This is a draft specification for X16 kernel-supported generic IO devices. Devices which adhere to this spec will be able to seemlessly integrate with the CBMDOS subsystem such that kernel functions like MACPTR can initiate DMA transfers on the caller's behalf.
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| Analyze65 start | | |
| Analyze65> bp=$2e8df | | |
| Breakpoint set $02,$E8DF | | |
| Analyze65> resb=1 | | |
| $ Reset set to 1 | | |
| Analyze65> step=10 | | |
| 0 : $(ffff) : e0, VectorPull | | |
| 2 : $00:ffff e0 e0 cpx #$e0 | ???????? |
| Analyze65 start | |
| Analyze65 start | |
| Analyze65> showbus | |
| . $(ffbe) : 00, -Write, VectorPull, -Sync, -Clock *Reset | |
| Analyze65> step=8 | |
| . $(ffbe) : 00, VectorPull *Reset |
| Analyze65 start | |
| Analyze65> showbus | |
| . $(ff03) : 00, -Write, -VectorPull, -Sync, -Clock *Reset | |
| Analyze65> step=8 | |
| . $(ff03) : 00 *Reset | |
| . $(ff03) : 00 *Reset | |
| . $(ff03) : 00 *Reset | |
| . $(ff03) : 00 *Reset |
| X16 HW Analyzer> tick | |
| . $(de4b) : 55 | |
| -> lda #$55 | |
| X16 HW Analyzer> showbus | |
| . $(de4b) : 55, -Write, -VectorPull, -Sync, -Clock | |
| X16 HW Analyzer> tick | |
| X16 HW Analyzer> showbus | |
| . $(de4b) : 55, -Write, -VectorPull, -Sync, +Clock | |
| X16 HW Analyzer> tick | |
| . $(de4c) : 92, Sync |
| Starting VERA Driver. | |
| Waiting for VERA to be ready. | |
| 0 <- 2A | |
| Saw 255 waiting for VERA to become responsive... | |
| Waiting for VERA to be ready. | |
| 0 <- 2A | |
| Saw 255 waiting for VERA to become responsive... | |
| Waiting for VERA to be ready. | |
| 0 <- 2A | |
| Saw 255 waiting for VERA to become responsive... |
| /** | |
| * Arduino-based VERA driver using the MCP3017 GPIO expansion IC. | |
| * | |
| * Port A of of the MCP3017 is mapped as: | |
| * Bit(s) | Function | |
| * -------+------------- | |
| * 0-4 | VERA address 0-4 (bit 0 of port maps to A0 of VERA) | |
| * 5 | RD# | |
| * 6 | WR# | |
| * 7 | CS# |
| import random | |
| import Tkinter | |
| from Tkinter import * | |
| window = Tk() | |
| window.title('Magic 8 Ball') | |
| window.geometry("500x500") | |
| window.resizable(0,0) | |
| center_frame = Frame(window) |
| p_memo = {} | |
| def is_prime(p): | |
| # check primality using FLT | |
| # return (p > 1) and (((2**(p-1)) - 1) % p == 0) or (p == 2) | |
| # FLT gets pretty slow when p is only modestly large (~100K), so switching | |
| # back to the old iterative method. | |
| # memoizing here seems to give us a 50% boost in performance. Something | |
| # seems fishy about that fact. |