Difference between revisions of "Peripheral 2 Register"
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(Core 2.00.26 changes) |
(Core 2.00.28 changes) |
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| 7 || Enable turbo mode key "F8", 0 = disabled (0 after PoR or Hard-reset) | | 7 || Enable turbo mode key "F8", 0 = disabled (0 after PoR or Hard-reset) | ||
|- | |- | ||
| − | | 6 || | + | | 6 || DMA mode (0 = zxnDMA, 1 = Z80 DMA) (0 after PoR or Hard-reset) |
|- | |- | ||
| 5 || Enable Lightpen (1 = enabled) (0 after PoR or Hard-reset) | | 5 || Enable Lightpen (1 = enabled) (0 after PoR or Hard-reset) | ||
Revision as of 17:15, 28 February 2019
| Number | $06 |
|---|---|
| Readable | Yes |
| Writable | Yes |
| Short Description | Enables Acceleration, Lightpen, DivMMC, Multiface, Mouse and AY audio. |
| Bit | Function |
|---|---|
| 7 | Enable turbo mode key "F8", 0 = disabled (0 after PoR or Hard-reset) |
| 6 | DMA mode (0 = zxnDMA, 1 = Z80 DMA) (0 after PoR or Hard-reset) |
| 5 | Enable Lightpen (1 = enabled) (0 after PoR or Hard-reset) |
| 4 | DivMMC automatic paging (1 = enabled) (0 after PoR or Hard-reset) |
| 3 | Enable Multiface (1 = enabled) (0 after PoR or Hard-reset) |
| 2 | PS/2 mode (0 = keyboard, 1 = mouse), exchanges the keyboard/mouse pins on the PS/2 connector (0 after PoR or Hard-reset) |
| 1-0 | Audio chip mode (%00 = YM, %01 = AY, %1x = Disabled) |
The bit 7 doesn't prevent SW from setting up turbo mode by writing into CPU Speed Register ($07), it is used only to enable/disable the "F8" key toggle (core 2.00.24 information).