izapple2/smartPortCall.go

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package izapple2
import "fmt"
/*
A smartPort device
*/
type smartPortDevice interface {
exec(call *smartPortCall) uint8
}
const (
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smartPortCommandStatus = 0
smartPortCommandReadBlock = 1
smartPortCommandWriteBlock = 2
smartPortCommandFormat = 3
smartPortCommandControl = 4
smartPortCommandInit = 5
smartPortCommandOpen = 6
smartPortCommandClose = 7
smartPortCommandRead = 8
smartPortCommandWrite = 9
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)
const (
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smartPortStatusCodeDevice = 0
smartPortStatusCodeDeviceControlBlock = 1
smartPortStatusCodeNewline = 2
smartPortStatusCodeDeviceInfo = 3
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)
const (
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smartPortStatusCodeTypeBlock = uint8(1) << 7
smartPortStatusCodeTypeWrite = uint8(1) << 6
smartPortStatusCodeTypeRead = uint8(1) << 5
smartPortStatusCodeTypeOnline = uint8(1) << 4
smartPortStatusCodeTypeFormat = uint8(1) << 3
smartPortStatusCodeTypeProtected = uint8(1) << 2
smartPortStatusCodeTypeInterruping = uint8(1) << 1
smartPortStatusCodeTypeOpen = uint8(1) << 0
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)
const (
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smartPortNoError = uint8(0)
smartPortBadCommand = uint8(1)
smartPortErrorIO = uint8(0x27)
smartPortErrorNoDevice = uint8(0x28)
smartPortErrorWriteProtected = uint8(0x2b)
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)
type smartPortCall struct {
host *CardSmartPort
command uint8
address uint16 // When the params are on the Apple memory
params []uint8 // When the params are built externally as on a ProDOS to SP translation
}
func newSmartPortCall(host *CardSmartPort, command uint8, address uint16) *smartPortCall {
var spc smartPortCall
spc.host = host
spc.command = command
spc.address = address
spc.params = nil
return &spc
}
func newSmartPortCallSynthetic(host *CardSmartPort, command uint8, params []uint8) *smartPortCall {
var spc smartPortCall
spc.host = host
spc.command = command
spc.address = 0xffff
spc.params = params
return &spc
}
func (spc *smartPortCall) unit() uint8 {
return spc.param8(1)
}
func (spc *smartPortCall) statusCode() uint8 {
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if spc.command != smartPortCommandStatus {
panic("Status code paremeter requeted for a non status smartPort call")
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}
return spc.param8(4)
}
func (spc *smartPortCall) param8(offset uint8) uint8 {
if spc.params == nil {
return spc.host.a.mmu.Peek(spc.address + uint16(offset))
}
if int(offset) >= len(spc.params) {
panic("Synthetised smartpot call out of range")
}
return spc.params[offset]
}
func (spc *smartPortCall) param16(offset uint8) uint16 {
return uint16(spc.param8(offset)) +
uint16(spc.param8(offset+1))<<8
}
func (spc *smartPortCall) param24(offset uint8) uint32 {
return uint32(spc.param8(offset)) +
uint32(spc.param8(offset+1))<<8 +
uint32(spc.param8(offset+2))<<16
}
func (spc *smartPortCall) paramData(offset uint8) []uint8 {
address := uint16(spc.param8(offset)) +
uint16(spc.param8(offset+1))<<8
size := spc.host.a.mmu.peekWord(address)
data := make([]uint8, size)
for i := 0; i < int(size); i++ {
data[i] = spc.host.a.mmu.Peek(address + 2 + uint16(i))
}
return data
}
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func (spc *smartPortCall) String() string {
switch spc.command {
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case smartPortCommandStatus:
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return fmt.Sprintf("STATUS(%v, unit=%v, code=%v)",
spc.command, spc.unit(),
spc.statusCode())
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case smartPortCommandReadBlock:
return fmt.Sprintf("READBLOCK(%v, unit=%v, block=%v)",
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spc.command, spc.unit(),
spc.param24(4))
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case smartPortCommandWriteBlock:
return fmt.Sprintf("WRITEBLOCK(%v, unit=%v, block=%v)",
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spc.command, spc.unit(),
spc.param24(4))
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case smartPortCommandControl:
return fmt.Sprintf("CONTROL(%v, unit=%v, code=%v)",
spc.command, spc.unit(),
spc.param8(4))
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case smartPortCommandInit:
return fmt.Sprintf("INIT(%v, unit=%v)",
spc.command, spc.unit())
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case smartPortCommandOpen:
return fmt.Sprintf("OPEN(%v, unit=%v)",
spc.command, spc.unit())
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case smartPortCommandClose:
return fmt.Sprintf("CLOSE(%v, unit=%v)",
spc.command, spc.unit())
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case smartPortCommandRead:
return fmt.Sprintf("READ(%v, unit=%v, pos=%v, len=%v)",
spc.command, spc.unit(),
spc.param24(6),
spc.param16(4))
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case smartPortCommandWrite:
return fmt.Sprintf("WRITE(%v, unit=%v, pos=%v, len=%v)",
spc.command, spc.unit(),
spc.param24(6),
spc.param16(4))
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default:
return fmt.Sprintf("UNKNOWN(%v, unit=%v)",
spc.command, spc.unit())
}
}
func smartPortErrorMessage(code uint8) string {
switch code {
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case smartPortNoError:
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return "SUCCESS"
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case smartPortBadCommand:
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return "BAD_COMMAND"
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case smartPortErrorIO:
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return "ERROR_IO"
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case smartPortErrorNoDevice:
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return "NO_DEVICE"
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case smartPortErrorWriteProtected:
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return "WRITE_PROTECT_ERROR"
default:
return string(code)
}
}