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odds and ends

License: MIT License

Propeller Spin 99.53% C 0.47%

propeller-spin 6502 sid ssd1306 parallax-propeller pasm

modulity's Introduction

modulity

odds and ends (which aren't anywhere near video drivers)

SID.badge

Parallax eBadge based SID player (initial release for Dr. Wuro Industries, ZeHa)

SID.play

dual core 6502/8580 emulation

modulity's People

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modulity's Issues

[P8X32A]: wrbyte wz

This used to work, i.e. always works in test cases. Here it seems to depend on randomly inserted insn.

I found the general issue (emulator Z flag not being set)
wrbyte value, address wz with value == $xxxxxx00 should set the native Z flag
current theory is memory corruption (behaves the same on two different h/w platforms, C3+QS)

pre-charge and Vcom deselect

They are currently used with their reset settings (2/2 and 32 respectively), it is recommended to use 15/1 (DC/DC setup) and 64.

D9, F1
DB, 40

[SID.badge]: timing related replay issue

Playing song N for a specific amount of time will either mute song N+1 or let it play normally.

Other songs don't seem to be affected.

SIDcog: pin 0 fix isn't quite complete

PUB start(right, left)
' ┌──────────────────────────────────────────────────────────────┐
' │               Starts SIDcog in a single cog                  │
' ├──────────────────────────────────────────────────────────────┤
' │ Returns a pointer to the first SID register in hub memory    │
' │ on success; otherwise returns 0.                             │
' │                                                              │
' │ right - The pin to output the right channel to.              │
' │         ]0..31[ = Not used                                   │
' │                                                              │
' │ left - The pin to output the left channel to.                │
' │        ]0..31[ = Not used                                    │
' └──────────────────────────────────────────────────────────────┘
  arg1 := arg2 := r1 := 0
  ifnot -32 & left
    r1 |= |< (arg1 := $18000000 | left)
  ifnot -32 & right
    r1 |= |< (arg2 := $18000000 | right)
  sampleRate := clkfreq/trunc(C64_CLOCK_FREQ/32.0)
  combTableAddr := @combinedWaveforms
  if cog := cognew(@SIDEMU, @ch1_frequencyLo) + 1
    return @ch1_frequencyLo

[SID.badge]: I2C driver needs to be cleaned up

API can be cut down to simple byte r/w functionality
endianness stuff doesn't belong in the driver
PASM clean-up

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