92 lines
2.0 KiB
Go
92 lines
2.0 KiB
Go
package izapple2
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import (
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"fmt"
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"time"
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)
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/*
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A clock device that could be implemented by Fujinet:
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*/
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// SmartPortFujinetClock represents a Fujinet clock device
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type SmartPortFujinetClock struct {
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host *CardSmartPort // For DMA
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trace bool
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}
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// NewSmartPortFujinetClock creates a new fujinet device
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func NewSmartPortFujinetClock(host *CardSmartPort) *SmartPortFujinetClock {
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var d SmartPortFujinetClock
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d.host = host
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return &d
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}
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func (d *SmartPortFujinetClock) exec(call *smartPortCall) uint8 {
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var result uint8
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switch call.command {
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case smartPortCommandOpen:
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result = smartPortNoError
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case smartPortCommandClose:
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result = smartPortNoError
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case smartPortCommandStatus:
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address := call.param16(2)
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result = d.status(call.statusCode(), address)
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default:
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// Prodos device command not supported
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result = smartPortErrorIO
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}
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if d.trace {
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fmt.Printf("[SmartPortFujinetClock] Command %v, return %s \n",
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call, smartPortErrorMessage(result))
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}
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return result
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}
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func (d *SmartPortFujinetClock) status(code uint8, dest uint16) uint8 {
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switch code {
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case smartPortStatusCodeDevice:
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// See iwmNetwork::encode_status_reply_packet()
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d.host.a.mmu.pokeRange(dest, []uint8{
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0, // NA for a clock
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0, 0, 0, // Block size is 0
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})
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case smartPortStatusCodeDeviceInfo:
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// See iwmNetwork::encode_status_reply_packet()
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d.host.a.mmu.pokeRange(dest, []uint8{
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smartPortStatusCodeTypeRead & smartPortStatusCodeTypeOnline,
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0, 0, 0, // Block size is 0
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8, 'F', 'N', '_', 'C', 'L', 'O', 'C', 'K', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
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0x0f, // Type clock. See http://www.1000bit.it/support/manuali/apple/technotes/smpt/tn.smpt.4.html
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0x00, // Subtype
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0x00, 0x01, // Firmware version
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})
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case 'T':
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// Get time
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now := time.Now()
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d.host.a.mmu.pokeRange(dest, []uint8{
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uint8(now.Year() / 100),
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uint8(now.Year() % 100),
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uint8(now.Month()),
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uint8(now.Day()),
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uint8(now.Hour()),
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uint8(now.Minute()),
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uint8(now.Second()),
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})
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}
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return smartPortNoError // The return code is always success
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}
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